ML17068A045: Difference between revisions
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==SUBJECT:== | ==SUBJECT:== | ||
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 6, 2017 Michael T. Markley, Chief Plant Licensing Branch 11-1 Div_ision of Operating Reactor | UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 6, 2017 Michael T. Markley, Chief Plant Licensing Branch 11-1 Div_ision of Operating Reactor | ||
.. * / Office of Nuclear Reactor Regulation | .. * / Office of Nuclear Reactor Regulation | ||
(' J ) ;, G. Edward Miller, Project Manager /// / v/ Special Projects and Process Branch/ | (' J ) ;, G. Edward Miller, Project Manager /// / v/ Special Projects and Process Branch/ | ||
;-It .. __ Division of Operating Reactor Office of Nuclear Reactor Regulation SUMMARY OF FEBRUARY 28, 2017, PUBLIC MEETING REGARDING LICENSE AMENDMENT REQUEST TO IMPLEMENT RISK-INFORMED TECHNICAL SPECIFICATION COMPLETION TIMES AT VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 (CAC NOS. ME9555 AND ME9556) On February 28, 2017, the U.S. Nuclear Regulatory Commission (NRC) staff held a public | ;-It .. __ Division of Operating Reactor Office of Nuclear Reactor Regulation | ||
The purpose of the meeting was to discuss SN C's license amendment request to implement informed Technical Specification Completion Times (RICT) for the Vogtle Electric Generating Plant, Units 1 and 2. Specifically, the discussion was focused on draft request for additional information (RAI) questions 6, 10, and 11 that were provided to SNC on February 24, 2017.2 The discussion was a continuation from a February 7, 2017, public | ==SUMMARY== | ||
The NRC staff indicated that the preferred method, consistent with Regulatory Guide 1.177, "An Approach for Plant-Specific Risk-Informed Decisionmaking for lnservice Inspection of Piping," | OF FEBRUARY 28, 2017, PUBLIC MEETING REGARDING LICENSE AMENDMENT REQUEST TO IMPLEMENT RISK-INFORMED TECHNICAL SPECIFICATION COMPLETION TIMES AT VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 (CAC NOS. ME9555 AND ME9556) On February 28, 2017, the U.S. Nuclear Regulatory Commission (NRC) staff held a public meeting 1 with staff from Southern Nuclear Operating Company, Inc. (SNC or the licensee). | ||
to address this issue would be to adjust the numerical RICT calculation to account for CCF until such a possibility had been eliminated. | The purpose of the meeting was to discuss SN C's license amendment request to implement informed Technical Specification Completion Times (RICT) for the Vogtle Electric Generating Plant, Units 1 and 2. Specifically, the discussion was focused on draft request for additional information (RAI) questions 6, 10, and 11 that were provided to SNC on February 24, 2017.2 The discussion was a continuation from a February 7, 2017, public meeting 3 on this topic. The NRC staff provided a summary of RAI 6, which focuses on accounting for the risk of common-cause failure (CCF) during emergent equipment failures. | ||
The NRC staff stated that, in lieu of numerically accounting for the increased possibility of CCF, risk management actions (RMAs) not credited in the probabilistic risk assessment could potentially be used if they were implemented prior to exceeding the front stop and were sufficient to ensure that any safety function(s) would not be lost if the remaining train failed to function upon demand. SNC noted that another way to ameliorate the increased risk from potential CCF would be to reduce the likelihood of initiating events that would place demand on the alternate train. The NRC staff indicated that such an approach would require further consideration, but that it would be difficult to compare the effect of the RMAs to the effect of CCF without calculating numerical impacts. | The NRC staff indicated that the preferred method, consistent with Regulatory Guide 1.177, "An Approach for Plant-Specific Risk-Informed Decisionmaking for lnservice Inspection of Piping," to address this issue would be to adjust the numerical RICT calculation to account for CCF until such a possibility had been eliminated. | ||
1 The original meeting notice is available via the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML 17052A 180. 2 The draft RAI is available under ADAMS Accession No. ML 17058A 127. 3 The meeting summary for the February 7, 2017, meeting is available under ADAMS Accession No. ML 17041A366. | The NRC staff stated that, in lieu of numerically accounting for the increased possibility of CCF, risk management actions (RMAs) not credited in the probabilistic risk assessment could potentially be used if they were implemented prior to exceeding the front stop and were sufficient to ensure that any safety function(s) would not be lost if the remaining train failed to function upon demand. SNC noted that another way to ameliorate the increased risk from potential CCF would be to reduce the likelihood of initiating events that would place demand on the alternate train. The NRC staff indicated that such an approach would require further consideration, but that it would be difficult to compare the effect of the RMAs to the effect of CCF without calculating numerical impacts. 1 The original meeting notice is available via the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML 17052A 180. 2 The draft RAI is available under ADAMS Accession No. ML 17058A 127. 3 The meeting summary for the February 7, 2017, meeting is available under ADAMS Accession No. ML 17041A366. | ||
M. Markley Although better understanding was reached, at the conclusion of the meeting, both parties agreed that additional interactions would be necessary with regard to RAI 6. SNC acknowledged that they understood what information was being requested for RAls 10 and 11. Another public meeting would be planned at a later date and noticed via the normal process. | M. Markley Although better understanding was reached, at the conclusion of the meeting, both parties agreed that additional interactions would be necessary with regard to RAI 6. SNC acknowledged that they understood what information was being requested for RAls 10 and 11. Another public meeting would be planned at a later date and noticed via the normal process. No regulatory decisions were made at the meeting. Following the discussion, an opportunity was afforded to any other participants who wished to ask questions or make comments. | ||
No regulatory decisions were made at the meeting. | |||
Following the discussion, an opportunity was afforded to any other participants who wished to ask questions or make comments. | |||
No questions or comments were received. | No questions or comments were received. | ||
Docket Nos. 50-424 and 50-425 | Docket Nos. 50-424 and 50-425 | ||
| Line 45: | Line 42: | ||
/,,.......l':'..6K J'S f"ra ri113 ('!\ 11 "'Z-r 0"" f' h11111lfl rr;,) ,rY/; I YI \J f.tvi ol o 11:,Q/' | /,,.......l':'..6K J'S f"ra ri113 ('!\ 11 "'Z-r 0"" f' h11111lfl rr;,) ,rY/; I YI \J f.tvi ol o 11:,Q/' | ||
;IN' e:*e;; (( 1\11 r/1Jja/ ED M1tC(f( Public Meeting With SNC To Discuss Vogtle RICT LAR Organization l...l C c;;;:i. '5#(_ | ;IN' e:*e;; (( 1\11 r/1Jja/ ED M1tC(f( Public Meeting With SNC To Discuss Vogtle RICT LAR Organization l...l C c;;;:i. '5#(_ | ||
SNC ;V( c)A/£1?/ | SNC ;V( c)A/£1?/ f)Ss I S7.S8 1,_£1 5 I\/ ( /V ( / | ||
f)Ss I S7.S8 1,_£1 5 I\/ ( /V ( / | |||
I .. ,/4l2A N Rr<. I f;c,t<, L M. Markley | I .. ,/4l2A N Rr<. I f;c,t<, L M. Markley | ||
==SUBJECT:== | ==SUBJECT:== | ||
SUMMARY OF FEBRUARY 28, 2017, PUBLIC MEETING REGARDING LICENSE AMENDMENT REQUEST TO IMPLEMENT RISK-INFORMED TECHNICAL SPECIFICATION COMPLETION TIMES AT VOGTLE ELECTRIC GENERATING PLANT, UNITS 1AND2 (CAC NOS. ME9555 AND ME9556) DATED APRIL 6, 2017 DISTRIBUTION: | ==SUMMARY== | ||
PUBLIC LSPB R/F RidsACRS_MailCTR Resource RidsNrrDorl Resource RidsNrrDorlLpl2-1 Resource RidsNrrDorlLspb Resource RidsNrrDraApla Resource RidsNrrDssStsb Resource RidsNrrLAJBurkhardt Resource RidsNrrLAKGoldstein Resource RidsNrrPMVogtle Resource RidsOpaMail Resource RidsRgn2MailCenter Resource | OF FEBRUARY 28, 2017, PUBLIC MEETING REGARDING LICENSE AMENDMENT REQUEST TO IMPLEMENT RISK-INFORMED TECHNICAL SPECIFICATION COMPLETION TIMES AT VOGTLE ELECTRIC GENERATING PLANT, UNITS 1AND2 (CAC NOS. ME9555 AND ME9556) DATED APRIL 6, 2017 DISTRIBUTION: | ||
PUBLIC LSPB R/F RidsACRS_MailCTR Resource RidsNrrDorl Resource RidsNrrDorlLpl2-1 Resource RidsNrrDorlLspb Resource RidsNrrDraApla Resource RidsNrrDssStsb Resource RidsNrrLAJBurkhardt Resource RidsNrrLAKGoldstein Resource RidsNrrPMVogtle Resource RidsOpaMail Resource RidsRgn2MailCenter Resource GMiller, NRR/DORL/LSPB CJackson, NRR/DSS ADAMS Accession No.: ML 17068A045 OFFICE NRR/DORL/LSPB/PM NRR/DORL/LSPB/LA NAME GEMiller JBurkhardt DATE 04/03/2017 3/14/2017 OFFICE NRR/DSS/STSB/BC NRR/DE/EEEB/BC NAME AKlein* JZimmerman DATE 03/20/2017 04/03/2017 OFFICIAL RECORD COPY *via e-mail NRR/DRA/APLA/BC SRosenberg 03/29/2017 NRR/DORL/LPL2-1 | |||
/BC MMarkley (SKoenick for) 04/06/2017}} | /BC MMarkley (SKoenick for) 04/06/2017}} | ||
Revision as of 23:58, 7 July 2018
| ML17068A045 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 04/06/2017 |
| From: | Miller G E Special Projects and Process Branch |
| To: | Markley M M Plant Licensing Branch II |
| Miller G E, NRR/DORL/LSPB, 415-2481 | |
| References | |
| CAC ME9555, CAC ME9556 | |
| Download: ML17068A045 (5) | |
Text
MEMORANDUM TO: FROM:
SUBJECT:
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 6, 2017 Michael T. Markley, Chief Plant Licensing Branch 11-1 Div_ision of Operating Reactor
.. * / Office of Nuclear Reactor Regulation
(' J ) ;, G. Edward Miller, Project Manager /// / v/ Special Projects and Process Branch/
- -It .. __ Division of Operating Reactor Office of Nuclear Reactor Regulation
SUMMARY
OF FEBRUARY 28, 2017, PUBLIC MEETING REGARDING LICENSE AMENDMENT REQUEST TO IMPLEMENT RISK-INFORMED TECHNICAL SPECIFICATION COMPLETION TIMES AT VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 (CAC NOS. ME9555 AND ME9556) On February 28, 2017, the U.S. Nuclear Regulatory Commission (NRC) staff held a public meeting 1 with staff from Southern Nuclear Operating Company, Inc. (SNC or the licensee).
The purpose of the meeting was to discuss SN C's license amendment request to implement informed Technical Specification Completion Times (RICT) for the Vogtle Electric Generating Plant, Units 1 and 2. Specifically, the discussion was focused on draft request for additional information (RAI) questions 6, 10, and 11 that were provided to SNC on February 24, 2017.2 The discussion was a continuation from a February 7, 2017, public meeting 3 on this topic. The NRC staff provided a summary of RAI 6, which focuses on accounting for the risk of common-cause failure (CCF) during emergent equipment failures.
The NRC staff indicated that the preferred method, consistent with Regulatory Guide 1.177, "An Approach for Plant-Specific Risk-Informed Decisionmaking for lnservice Inspection of Piping," to address this issue would be to adjust the numerical RICT calculation to account for CCF until such a possibility had been eliminated.
The NRC staff stated that, in lieu of numerically accounting for the increased possibility of CCF, risk management actions (RMAs) not credited in the probabilistic risk assessment could potentially be used if they were implemented prior to exceeding the front stop and were sufficient to ensure that any safety function(s) would not be lost if the remaining train failed to function upon demand. SNC noted that another way to ameliorate the increased risk from potential CCF would be to reduce the likelihood of initiating events that would place demand on the alternate train. The NRC staff indicated that such an approach would require further consideration, but that it would be difficult to compare the effect of the RMAs to the effect of CCF without calculating numerical impacts. 1 The original meeting notice is available via the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML 17052A 180. 2 The draft RAI is available under ADAMS Accession No. ML 17058A 127. 3 The meeting summary for the February 7, 2017, meeting is available under ADAMS Accession No. ML 17041A366.
M. Markley Although better understanding was reached, at the conclusion of the meeting, both parties agreed that additional interactions would be necessary with regard to RAI 6. SNC acknowledged that they understood what information was being requested for RAls 10 and 11. Another public meeting would be planned at a later date and noticed via the normal process. No regulatory decisions were made at the meeting. Following the discussion, an opportunity was afforded to any other participants who wished to ask questions or make comments.
No questions or comments were received.
Docket Nos. 50-424 and 50-425
Enclosure:
List of Attendees cc: Listserv
\ Sign In Sheet DATE: Feb 28, 2017 Name LIST OF ATTENDEES Public Meeting With SNC To Discuss Vogtle RICT LAR Enclosure Sign In Sheet DATE: Feb 28, 2017 Name ov-..1e..1"'"-'
\-COT I VLL/c.. I/ ,<1.-' A.t->11..rv'I.
/,,.......l':'..6K J'S f"ra ri113 ('!\ 11 "'Z-r 0"" f' h11111lfl rr;,) ,rY/; I YI \J f.tvi ol o 11:,Q/'
- IN' e
- *e;; (( 1\11 r/1Jja/ ED M1tC(f( Public Meeting With SNC To Discuss Vogtle RICT LAR Organization l...l C c;;;:i. '5#(_
SNC ;V( c)A/£1?/ f)Ss I S7.S8 1,_£1 5 I\/ ( /V ( /
I .. ,/4l2A N Rr<. I f;c,t<, L M. Markley
SUBJECT:
SUMMARY
OF FEBRUARY 28, 2017, PUBLIC MEETING REGARDING LICENSE AMENDMENT REQUEST TO IMPLEMENT RISK-INFORMED TECHNICAL SPECIFICATION COMPLETION TIMES AT VOGTLE ELECTRIC GENERATING PLANT, UNITS 1AND2 (CAC NOS. ME9555 AND ME9556) DATED APRIL 6, 2017 DISTRIBUTION:
PUBLIC LSPB R/F RidsACRS_MailCTR Resource RidsNrrDorl Resource RidsNrrDorlLpl2-1 Resource RidsNrrDorlLspb Resource RidsNrrDraApla Resource RidsNrrDssStsb Resource RidsNrrLAJBurkhardt Resource RidsNrrLAKGoldstein Resource RidsNrrPMVogtle Resource RidsOpaMail Resource RidsRgn2MailCenter Resource GMiller, NRR/DORL/LSPB CJackson, NRR/DSS ADAMS Accession No.: ML 17068A045 OFFICE NRR/DORL/LSPB/PM NRR/DORL/LSPB/LA NAME GEMiller JBurkhardt DATE 04/03/2017 3/14/2017 OFFICE NRR/DSS/STSB/BC NRR/DE/EEEB/BC NAME AKlein* JZimmerman DATE 03/20/2017 04/03/2017 OFFICIAL RECORD COPY *via e-mail NRR/DRA/APLA/BC SRosenberg 03/29/2017 NRR/DORL/LPL2-1
/BC MMarkley (SKoenick for) 04/06/2017