Testing of Open Secondary Window-Type Current Transformers-Test Plan, 46061-46062 [2015-18997]

Download as PDF Federal Register / Vol. 80, No. 148 / Monday, August 3, 2015 / Notices compatibility levels for rule requirements? Applicability to General Licensees The applicability of financial planning requirements to licensees possessing generally licensed sealed sources should be considered. According to the 2014 Disused Sources Working Group report, there are at least a few licensees who possess generally licensed sources in quantities of concern. Question 6: When necessary, what mechanism should be used to administer financial planning requirements on general licensees? mstockstill on DSK4VPTVN1PROD with NOTICES Characteristics and Qualifications of the Fund Custodian Another consideration in establishing financial planning requirements is how to determine the proper custodian for the fund that is to be earmarked for disposition. Question 7: What are the ideal characteristics and qualifications for an entity that will act as the custodian for any funds earmarked for long-term management of disused sealed sources? For instance, what characteristics and qualifications should be taken into consideration regarding the custodian’s relationship to the licensee (e.g., the ability of the custodian to access the funds, or the custodian’s independent financial viability)? In the event that there is a residual amount remaining in the fund following payment of disposition cost, what should be the fate of the residual funds? Tracking For licensees possessing Category 1 or 2 radioactive sealed sources, regulators can access the National Source Tracking System (NSTS) to determine the number and type of licensees that would be potentially impacted by end-of-life financial assurance requirements. For new sources, source manufacturers or suppliers could be contacted to determine how they would be impacted by any new requirements. However, it may be more difficult to implement requirements and ensure accountability regarding sources that are not tracked in the NSTS (e.g. Category 3 and lower). Question 8: What are the key characteristics of a tracking system for byproduct material (sealed sources) subject to financial planning requirements? Which of these characteristics are not available as part of the NSTS? The topical areas and questions that the NRC staff has identified above are consequential, but not exhaustive. Varied perspectives from a broad range VerDate Sep<11>2014 18:35 Jul 31, 2015 Jkt 235001 of stakeholders will be beneficial. Further, NRC staff anticipates that stakeholders will identify and provide their perspectives on additional issues they identify that are relevant to financial planning for management of disused or unwanted radioactive byproduct material. Based on the results of the expanded byproduct material financial scoping study, staff will compile a report with study results and recommendations for next steps to be provided to the Commission in spring 2016. Staff recommendations could include options such as limited rulemaking, broad scope rulemaking, advance notice of proposed rulemaking, development of guidance, issuance of a generic communication, or no action. IV. Topic-Specific Public Meeting The NRC will convene a topic-specific public meeting in Rockville, MD, in early fall 2015. The public meeting will include a webinar and teleconference for the convenience of participants who find attendance inconvenient or prohibitive. A meeting notice will be posted to the NRC’s public Web site at http://meetings.nrc.gov/pmns/mtg no fewer than 10 days prior to the meeting providing the date, time, and venue of the meeting, as well as remote participation instructions. A transcript of the public meeting will be made publicly available in ADAMS, as well as posted on the Federal Rulemaking Web site at http://www.regulations.gov, under Docket ID NRC–2015–0182. The Federal Rulemaking Web site allows you to receive alerts when changes or additions occur in a docket folder. To subscribe: (1) Navigate to the docket folder (NRC–2015–0182); (2) click the ‘‘Email Alert’’ link; and (3) enter your email address and select how frequently you would like to receive emails (daily, weekly, or monthly). The NRC staff will use the information gathered from the public meeting to supplement information gathered in response to this FRN and other sources to prepare a report on byproduct material financial scoping study for the Commission, which will include the NRC staff’s recommendations for next steps. Dated at Rockville, MD this 24th day of July 2015. For the Nuclear Regulatory Commission. Andrew Persinko, Deputy Director, Division of Decommissioning, Uranium Recovery, and Waste Programs, Office of Nuclear Material Safety and Safeguards. [FR Doc. 2015–18891 Filed 7–31–15; 8:45 am] BILLING CODE 7590–01–P PO 00000 Frm 00130 Fmt 4703 Sfmt 4703 46061 NUCLEAR REGULATORY COMMISSION [NRC–2015–0183] Testing of Open Secondary WindowType Current Transformers—Test Plan Nuclear Regulatory Commission. ACTION: Draft test plan; request for comment. AGENCY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment a proposed draft test plan, ‘‘Testing of Open Secondary WindowType Current Transformers—Test Plan.’’ The purpose of this testing is to better understand the following scenario: Will open circuiting of the secondary circuit of a current transformer (CT), which is operating within its rated continuous primary current limits, result in an excessively high voltage in the secondary circuit sufficient to start a fire in the form of explosion or arcing in the circuit’s insulation at the location of the CT itself or at some other location in the secondary circuit? DATES: Submit comments by September 2, 2015. Comments received after this date will be considered if it is practical to do so, but the Commission is able to ensure consideration only for comments received before this date. ADDRESSES: You may submit comments by any of the following methods (unless this document describes a different method for submitting comments on a specific subject): • Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC–2015–0183. Address questions about NRC dockets to Carol Gallagher; telephone: 301–415–3463; email: Carol.Gallagher@nrc.gov. For technical questions, contact the individual listed in the FOR FURTHER INFORMATION CONTACT section of this document. • Mail comments to: Cindy Bladey, Office of Administration, Mail Stop: OWFN–12–H08, U.S. Nuclear Regulatory Commission, Washington, DC 20555–0001. For additional direction on obtaining information and submitting comments, see ‘‘Obtaining Information and Submitting Comments’’ in the SUPPLEMENTARY INFORMATION section of this document. FOR FURTHER INFORMATION CONTACT: Shivani Mehta, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC 20555–0001; telephone: 301–415– 0860, email: Shivani.Mehta@nrc.gov. SUPPLEMENTARY INFORMATION: SUMMARY: E:\FR\FM\03AUN1.SGM 03AUN1 46062 Federal Register / Vol. 80, No. 148 / Monday, August 3, 2015 / Notices I. Obtaining Information and Submitting Comments A. Obtaining Information Please refer to Docket ID NRC–2015– 0183 when contacting the NRC about the availability of information for this action. You may obtain publiclyavailable information related to this action by any of the following methods: • Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC–2015–0183. • NRC’s Agencywide Documents Access and Management System (ADAMS): You may obtain publiclyavailable documents online in the ADAMS Public Documents collection at http://www.nrc.gov/reading-rm/ adams.html. To begin the search, select ‘‘ADAMS Public Documents’’ and then select ‘‘Begin Web-based ADAMS Search.’’ For problems with ADAMS, please contact the NRC’s Public Document Room (PDR) reference staff at 1–800–397–4209, 301–415–4737, or by email to pdr.resource@nrc.gov. The proposed draft test plan, ‘‘Testing of Open Secondary Window-Type Current Transformers—Test Plan’’ is available in ADAMS under Accession No. ML15203A228. • NRC’s PDR: You may examine and purchase copies of public documents at the NRC’s PDR, Room O1–F21, One White Flint North, 11555 Rockville Pike, Rockville, Maryland 20852. mstockstill on DSK4VPTVN1PROD with NOTICES B. Submitting Comments Please include Docket ID NRC–2015– 0183 in your comment submission. The NRC cautions you not to include identifying or contact information that you do not want to be publicly disclosed in your comment submission. The NRC will post all comment submissions at http:// www.regulations.gov as well as enter the comment submissions into ADAMS. The NRC does not routinely edit comment submissions to remove identifying or contact information. If you are requesting or aggregating comments from other persons for submission to the NRC, then you should inform those persons not to include identifying or contact information that they do not want to be publicly disclosed in their comment submission. Your request should state that the NRC does not routinely edit comment submissions to remove such information before making the comment submissions available to the public or entering the comment submissions into ADAMS. VerDate Sep<11>2014 18:35 Jul 31, 2015 Jkt 235001 II. Discussion The NRC is issuing for public comment a proposed draft test plan. The purpose of this test program is to better understand and obtain information to form a technical basis for assessing the propensity of a secondary fire or damage to the secondary side circuit or components as a result of an opencircuited current transformer (CT) secondary winding. Specifically, the test program will allow investigation of the high-voltage in the secondary circuit to determine if it is sufficient to induce a fire in the circuit’s insulation at the CT location or within the secondary circuit. The NRC is seeking public comment in order to receive feedback from the widest range of interested parties and to ensure that all information relevant to developing this document is available to the NRC staff. This document is issued for comment only and is not intended for interim use. The NRC will review public comments received on the documents, incorporate suggested changes as necessary, and make the final test plan available to the public through ADAMS and http:// www.regulations.gov at Docket ID NRC– 2015–0183, and will be documented in the final test report. No responses will be provided to specific commenters in regards to the disposition of their comments. Current transformers (CTs) are widely used to monitor the current at strategic locations of electrical power distribution systems in nuclear power plants (NPPs). The CTs provide isolation from the high-voltage primary, and step-down the magnitude of the measured current to a value that can be safely handled by the monitoring instruments. Thus, they are designed to measure the current in alternating current (AC) power systems (generally three-phase systems) in their primary winding and transform this current into a representative low secondary current for instrumentation used for remote readout of the current. An open-circuit in a CT’s secondary winding can cause high voltages on the secondary circuit as the CT attempts to maintain the current relationship dictated by the transformer’s winding turns ratio. The resulting high voltage condition in the secondary circuit from an opencircuited CT introduces a potential failure mode that warrants further investigation as part of the final resolution of circuit failure issues associated with the fire protection strategies at nuclear power plants. Specifically, an open circuit on a high voltage CT circuit may result in secondary damage, possibly resulting in PO 00000 Frm 00131 Fmt 4703 Sfmt 4703 the occurrence of an additional fire in the location of the CT itself or at a location remote to the CT. This potential event is described in Section 3.5.2.1 of the NEI 00–01, Revision 2 (ADAMS Accession No. ML091770265), and endorsed by Regulatory Guide 1.189, Revision 2 (ADAMS under Accession No. ML092580550). Accordingly, the purpose of this test program is to better understand and obtain information to form a technical basis for assessing the propensity of a secondary fire or damage to the secondary side circuit or components under an open-circuited CT secondary winding. Specifically, the test program will allow investigation of the highvoltage in the secondary circuit to determine if it is sufficient to induce a fire in the circuit’s insulation at the CT location or within the secondary circuit. Dated at Rockville, Maryland, this 27th day of July 2015. For the Nuclear Regulatory Commission. Felix Gonzalez, Acting Chief, Fire Research Branch, Division of Risk Analysis, Office of Nuclear Regulatory Research. [FR Doc. 2015–18997 Filed 7–31–15; 8:45 am] BILLING CODE 7590–01–P NUCLEAR REGULATORY COMMISSION [Docket Nos. 50–373 and 50–374; NRC–2 015–0180] Exelon Generation Company, LLC; LaSalle County Station, Units 1 and 2 Nuclear Regulatory Commission. ACTION: Environmental assessment and finding of no significant impact; issuance. AGENCY: The U.S. Nuclear Regulatory Commission (NRC) is considering issuance of amendments to Facility Operating License Nos. NPF–11 and NPF–18 issued to Exelon Generation Company, LLC (Exelon, the licensee) for operation of LaSalle County Station (LSCS), Units 1 and 2, located in LaSalle County, Illinois. The proposed amendment would revise the maximum allowable technical specification (TS) temperature of the ultimate heat sink for the plant. The NRC staff is issuing a final Environmental Assessment (EA) and Finding of No Significant Impact (FONSI) associated with the proposed license amendments. DATES: The environmental assessment and finding of no significant impact referenced in this document is available on August 3, 2015. SUMMARY: E:\FR\FM\03AUN1.SGM 03AUN1

Agencies

[Federal Register Volume 80, Number 148 (Monday, August 3, 2015)]
[Notices]
[Pages 46061-46062]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2015-18997]


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NUCLEAR REGULATORY COMMISSION

[NRC-2015-0183]


Testing of Open Secondary Window-Type Current Transformers--Test 
Plan

AGENCY: Nuclear Regulatory Commission.

ACTION: Draft test plan; request for comment.

-----------------------------------------------------------------------

SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for 
public comment a proposed draft test plan, ``Testing of Open Secondary 
Window-Type Current Transformers--Test Plan.'' The purpose of this 
testing is to better understand the following scenario: Will open 
circuiting of the secondary circuit of a current transformer (CT), 
which is operating within its rated continuous primary current limits, 
result in an excessively high voltage in the secondary circuit 
sufficient to start a fire in the form of explosion or arcing in the 
circuit's insulation at the location of the CT itself or at some other 
location in the secondary circuit?

DATES: Submit comments by September 2, 2015. Comments received after 
this date will be considered if it is practical to do so, but the 
Commission is able to ensure consideration only for comments received 
before this date.

ADDRESSES: You may submit comments by any of the following methods 
(unless this document describes a different method for submitting 
comments on a specific subject):
     Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2015-0183. Address 
questions about NRC dockets to Carol Gallagher; telephone: 301-415-
3463; email: Carol.Gallagher@nrc.gov. For technical questions, contact 
the individual listed in the FOR FURTHER INFORMATION CONTACT section of 
this document.
     Mail comments to: Cindy Bladey, Office of Administration, 
Mail Stop: OWFN-12-H08, U.S. Nuclear Regulatory Commission, Washington, 
DC 20555-0001.
    For additional direction on obtaining information and submitting 
comments, see ``Obtaining Information and Submitting Comments'' in the 
SUPPLEMENTARY INFORMATION section of this document.

FOR FURTHER INFORMATION CONTACT: Shivani Mehta, Office of Nuclear 
Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC 
20555-0001; telephone: 301-415-0860, email: Shivani.Mehta@nrc.gov.

SUPPLEMENTARY INFORMATION:

[[Page 46062]]

I. Obtaining Information and Submitting Comments

A. Obtaining Information

    Please refer to Docket ID NRC-2015-0183 when contacting the NRC 
about the availability of information for this action. You may obtain 
publicly-available information related to this action by any of the 
following methods:
     Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2015-0183.
     NRC's Agencywide Documents Access and Management System 
(ADAMS): You may obtain publicly-available documents online in the 
ADAMS Public Documents collection at http://www.nrc.gov/reading-rm/adams.html. To begin the search, select ``ADAMS Public Documents'' and 
then select ``Begin Web-based ADAMS Search.'' For problems with ADAMS, 
please contact the NRC's Public Document Room (PDR) reference staff at 
1-800-397-4209, 301-415-4737, or by email to pdr.resource@nrc.gov. The 
proposed draft test plan, ``Testing of Open Secondary Window-Type 
Current Transformers--Test Plan'' is available in ADAMS under Accession 
No. ML15203A228.
     NRC's PDR: You may examine and purchase copies of public 
documents at the NRC's PDR, Room O1-F21, One White Flint North, 11555 
Rockville Pike, Rockville, Maryland 20852.

B. Submitting Comments

    Please include Docket ID NRC-2015-0183 in your comment submission.
    The NRC cautions you not to include identifying or contact 
information that you do not want to be publicly disclosed in your 
comment submission. The NRC will post all comment submissions at http://www.regulations.gov as well as enter the comment submissions into 
ADAMS. The NRC does not routinely edit comment submissions to remove 
identifying or contact information.
    If you are requesting or aggregating comments from other persons 
for submission to the NRC, then you should inform those persons not to 
include identifying or contact information that they do not want to be 
publicly disclosed in their comment submission. Your request should 
state that the NRC does not routinely edit comment submissions to 
remove such information before making the comment submissions available 
to the public or entering the comment submissions into ADAMS.

II. Discussion

    The NRC is issuing for public comment a proposed draft test plan. 
The purpose of this test program is to better understand and obtain 
information to form a technical basis for assessing the propensity of a 
secondary fire or damage to the secondary side circuit or components as 
a result of an open-circuited current transformer (CT) secondary 
winding. Specifically, the test program will allow investigation of the 
high-voltage in the secondary circuit to determine if it is sufficient 
to induce a fire in the circuit's insulation at the CT location or 
within the secondary circuit.
    The NRC is seeking public comment in order to receive feedback from 
the widest range of interested parties and to ensure that all 
information relevant to developing this document is available to the 
NRC staff. This document is issued for comment only and is not intended 
for interim use. The NRC will review public comments received on the 
documents, incorporate suggested changes as necessary, and make the 
final test plan available to the public through ADAMS and http://www.regulations.gov at Docket ID NRC-2015-0183, and will be documented 
in the final test report. No responses will be provided to specific 
commenters in regards to the disposition of their comments.
    Current transformers (CTs) are widely used to monitor the current 
at strategic locations of electrical power distribution systems in 
nuclear power plants (NPPs). The CTs provide isolation from the high-
voltage primary, and step-down the magnitude of the measured current to 
a value that can be safely handled by the monitoring instruments. Thus, 
they are designed to measure the current in alternating current (AC) 
power systems (generally three-phase systems) in their primary winding 
and transform this current into a representative low secondary current 
for instrumentation used for remote readout of the current. An open-
circuit in a CT's secondary winding can cause high voltages on the 
secondary circuit as the CT attempts to maintain the current 
relationship dictated by the transformer's winding turns ratio. The 
resulting high voltage condition in the secondary circuit from an open-
circuited CT introduces a potential failure mode that warrants further 
investigation as part of the final resolution of circuit failure issues 
associated with the fire protection strategies at nuclear power plants. 
Specifically, an open circuit on a high voltage CT circuit may result 
in secondary damage, possibly resulting in the occurrence of an 
additional fire in the location of the CT itself or at a location 
remote to the CT. This potential event is described in Section 3.5.2.1 
of the NEI 00-01, Revision 2 (ADAMS Accession No. ML091770265), and 
endorsed by Regulatory Guide 1.189, Revision 2 (ADAMS under Accession 
No. ML092580550).
    Accordingly, the purpose of this test program is to better 
understand and obtain information to form a technical basis for 
assessing the propensity of a secondary fire or damage to the secondary 
side circuit or components under an open-circuited CT secondary 
winding. Specifically, the test program will allow investigation of the 
high-voltage in the secondary circuit to determine if it is sufficient 
to induce a fire in the circuit's insulation at the CT location or 
within the secondary circuit.

    Dated at Rockville, Maryland, this 27th day of July 2015.

    For the Nuclear Regulatory Commission.
Felix Gonzalez,
Acting Chief, Fire Research Branch, Division of Risk Analysis, Office 
of Nuclear Regulatory Research.
[FR Doc. 2015-18997 Filed 7-31-15; 8:45 am]
BILLING CODE 7590-01-P