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{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 7, 2015  
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 7, 2015  


Mr. Edward D. Halpin Senior Vice President and   Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6 Avila Beach, CA  93424  
Mr. Edward D. Halpin Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company  
 
Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6  
 
Avila Beach, CA  93424  


==SUBJECT:==
==SUBJECT:==
SUMMARY OF THE SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT RELATED TO THE ENVIRONMENTAL REVIEW OF THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MF4019 AND MF4020)
SUMMARY OF THE SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT RELATED TO THE ENVIRONMENTAL REVIEW OF THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MF4019 AND MF4020)  


==Dear Mr. Halpin:==
==Dear Mr. Halpin:==


On September 21-23, 2015, a review team consisting of staff from the U.S. Nuclear Regulatory Commission (NRC) and contractors from the Pacific Northwest National Laboratory participated in a site audit in San Luis Obispo, California, related to the severe accidents mitigation alternatives (SAMA) environmental review of the Diablo Canyon Power Plant (DCPP), Units 1 and 2, license renewal application. The primary goal of the site visit was to review documentation and gather information to ensure that the environmental requirements for license renewal, as codified in Title 10 of the Code of Federal Regulations Part 51 were met, in accordance with the issued audit plan (ML15233A518). The enclosure is a list of representatives from NRC and personnel from Pacific Gas and Electric (PG&E) and its contractors who participated in the site audit.
On September 21-23, 2015, a review team consisting of staff from the U.S. Nuclear Regulatory Commission (NRC) and contractors from the Pa cific Northwest National Laboratory participated in a site audit in San Luis Obispo, California, related to the severe accidents mitigation alternatives (SAMA) environmental review of the Diablo Canyon Power Plant (DCPP), Units 1 and 2, license renewal application. The primary goal of the site visit was to review documentation and gather information to ensure t hat the environmental requirements for license renewal, as codified in Title 10 of the Code of Federal Regulations Part 51 were met, in accordance with the issued audit plan (ML15233A518). The enclosure is a list of representatives from NRC and personnel from Pacific Gas and Electric (PG&E) and its contractors who participated in the site audit.
 
The audit began on September 21, 2015, with an entrance meeting to introduce participants and discuss logistics of the audit. Following the entrance meeting, the NRC environmental review team and PG&E discussed the following topics relative to the SAMA analysis:  (1) Level 1 Probabilistic Risk Assessment (PRA), (2) Level 2 model PRA, (3) external events, (4) Level 3 consequence analysis, (5) SAMA identification and screening, (6) cost-benefit analysis, and (7) consideration of potentially lower cost alternative SAMAs.   
The audit began on September 21, 2015, with an entrance meeting to introduce participants and discuss logistics of the audit. Following the entrance meeting, the NRC environmental review team and PG&E discussed the following topics relative to the SAMA analysis:  (1) Level 1 Probabilistic Risk Assessment (PRA), (2) Level 2 model PRA, (3) external events, (4) Level 3 consequence analysis, (5) SAMA identification and screening, (6) cost-benefit analysis, and (7) consideration of potentially lower cost alternative SAMAs.   


During the exit meeting at the conclusion of the site audit, the NRC environmental review team summarized the status of the review with PG&E. Most of the team's questions identified in the audit plan or during the audit were answered through the conduct of the audit.  
During the exit meeting at the conclusion of the site audit, the NRC environmental review team summarized the status of the review with PG&E. Most of the team's questions identified in the audit plan or during the audit were answered through the conduct of the audit.  
 
NRC staff is preparing requests for additional information (RAIs), which will be issued in a subsequent letter. While the NRC review team did not identify any significant environmental issues during its site audit, the environmental review of the DCPP license renewal application is ongoing, and thus, any additional information necessary to support the review would be formally requested via the RAI process.
 
Sincerely,
        /RA/  Michael J. Wentzel, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation


NRC staff is preparing requests for additional information (RAIs), which will be issued in a subsequent letter. While the NRC review team did not identify any significant environmental issues during its site audit, the environmental review of the DCPP license renewal application is ongoing, and thus, any additional information necessary to support the review would be formally requested via the RAI process.
Docket Nos. 50-275 and 50-323  
Sincerely,        /RA/  Michael J. Wentzel, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323


==Enclosure:==
==Enclosure:==
Line 41: Line 50:
cc w/encl:  Listserv  
cc w/encl:  Listserv  


ML15275A094          *concurrence via email OFFICE LA:DLR* PM:RPB2:DLRBC:RPB2:DLR PM:RPB2:DLR NAME IBetts MWentzel JDanna MWentzel DATE 10/ 5 /15 10/ 6 /15 10/ 7 /15 10/ 7 /15 Letter from M. Wentzel to E. Halpin dated October 7, 2015
ML15275A094          *concurrence via email OFFICE LA:DLR* PM:RPB2:DLRBC:RPB2:DLR PM:RPB2:DLR NAME IBetts MWentzel JDanna MWentzel DATE 10/ 5 /15 10/ 6 /15 10/ 7 /15 10/ 7 /15
 
Letter from M. Wentzel to E. Halpin dated October 7, 2015  


==SUBJECT:==
==SUBJECT:==
SUMMARY OF THE SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT RELATED TO THE ENVIRONMENTAL REVIEW OF THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MF4019 AND MF4020)   DISTRIBUTION:  HARD COPY: DLR RF E-MAIL: PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource RidsNrrDlrRsrg Resource RidsOgcMailCenter Resource RidsNrrPMDiabloCanyon Resource ---------------------
SUMMARY OF THE SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT RELATED TO THE ENVIRONMENTAL REVIEW OF THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MF4019 AND MF4020)
MWentzel JDanna RPlasse YDiaz-Sanabria SLingam CKanatas, OGC JLindell, OGC THipschman, SRI JReynoso, RI GMiller, RIV DMcIntyre, OPA LUselding, OPA WMaier, RIV AMoreno, OCA ENCLOSURE LIST OF PARTICIPANTS  DIABLO CANYON POWER PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION ENVIRONMENTAL REVIEW SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT   September 21-23, 2015 PARTICIPANTS ORGANIZATION Jerry Dozier U.S. Nuclear Regulatory Commission (NRC)
DISTRIBUTION
:  HARD COPY
: DLR RF E-MAIL: PUBLIC RidsNrrDlr Resource  
 
RidsNrrDlrRpb1 Resource  
 
RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource  
 
RidsNrrDlrRsrg Resource  
 
RidsOgcMailCenter Resource RidsNrrPMDiabloCanyon Resource ---------------------  
 
MWentzel  
 
JDanna RPlasse YDiaz-Sanabria SLingam CKanatas, OGC  
 
JLindell, OGC  
 
THipschman, SRI  
 
JReynoso, RI GMiller, RIV DMcIntyre, OPA LUselding, OPA WMaier, RIV  
 
AMoreno, OCA ENCLOSURE LIST OF PARTICIPANTS  DIABLO CANYON POWER PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION ENVIRONMENTAL REVIEW SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT September 21-23, 2015 PARTICIPANTS ORGANIZATION Jerry Dozier U.S. Nuclear Regulatory Commission (NRC)
Michael Wentzel NRC Bruce Schmitt Pacific Northwest National Laboratory (PNNL)
Michael Wentzel NRC Bruce Schmitt Pacific Northwest National Laboratory (PNNL)
Bob Schmidt PNNL Nathan Barker Pacific Gas and Electric (PG&E) Al Bates PG&E Terry Grebel PG&E Tom Jones PG&E Dave Miklash PG&E Michelle Olsofsky PG&E John Pyo PG&E Jearl Strickland PG&E David Bidwell ERIN Engineering and Research, Inc. (ERIN)
Bob Schmidt PNNL Nathan Barker Pacific Gas and Electric (PG&E) Al Bates PG&E Terry Grebel PG&E Tom Jones PG&E Dave Miklash PG&E Michelle Olsofsky PG&E John Pyo PG&E Jearl Strickland PG&E David Bidwell ERIN Engineering and Research, Inc. (ERIN)
Alex Duvall ERIN Donald MacLeod ERIN}}
Alex Duvall ERIN Donald MacLeod ERIN}}

Revision as of 20:45, 30 June 2018

Summary of the Severe Accident Mitigation Alternatives Site Audit Related to the Diablo Canyon Power Plant, Units 1 and 2 License Renewal Review
ML15275A094
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 10/07/2015
From: Wentzel M J
License Renewal Projects Branch 2
To: Halpin E D
Pacific Gas & Electric Co
Wentzel M J, NRR/DLR,415-6459
References
DLR-15-0458, TAC MF4019, TAC MF4020, FOIA/PA-2016-0438
Download: ML15275A094 (5)
v • d • e


Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 7, 2015

Mr. Edward D. Halpin Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company

Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6

Avila Beach, CA 93424

SUBJECT:

SUMMARY OF THE SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT RELATED TO THE ENVIRONMENTAL REVIEW OF THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MF4019 AND MF4020)

Dear Mr. Halpin:

On September 21-23, 2015, a review team consisting of staff from the U.S. Nuclear Regulatory Commission (NRC) and contractors from the Pa cific Northwest National Laboratory participated in a site audit in San Luis Obispo, California, related to the severe accidents mitigation alternatives (SAMA) environmental review of the Diablo Canyon Power Plant (DCPP), Units 1 and 2, license renewal application. The primary goal of the site visit was to review documentation and gather information to ensure t hat the environmental requirements for license renewal, as codified in Title 10 of the Code of Federal Regulations Part 51 were met, in accordance with the issued audit plan (ML15233A518). The enclosure is a list of representatives from NRC and personnel from Pacific Gas and Electric (PG&E) and its contractors who participated in the site audit.

The audit began on September 21, 2015, with an entrance meeting to introduce participants and discuss logistics of the audit. Following the entrance meeting, the NRC environmental review team and PG&E discussed the following topics relative to the SAMA analysis: (1) Level 1 Probabilistic Risk Assessment (PRA), (2) Level 2 model PRA, (3) external events, (4) Level 3 consequence analysis, (5) SAMA identification and screening, (6) cost-benefit analysis, and (7) consideration of potentially lower cost alternative SAMAs.

During the exit meeting at the conclusion of the site audit, the NRC environmental review team summarized the status of the review with PG&E. Most of the team's questions identified in the audit plan or during the audit were answered through the conduct of the audit.

NRC staff is preparing requests for additional information (RAIs), which will be issued in a subsequent letter. While the NRC review team did not identify any significant environmental issues during its site audit, the environmental review of the DCPP license renewal application is ongoing, and thus, any additional information necessary to support the review would be formally requested via the RAI process.

Sincerely,

/RA/ Michael J. Wentzel, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation

Docket Nos. 50-275 and 50-323

Enclosure:

As stated

cc w/encl: Listserv

ML15275A094 *concurrence via email OFFICE LA:DLR* PM:RPB2:DLRBC:RPB2:DLR PM:RPB2:DLR NAME IBetts MWentzel JDanna MWentzel DATE 10/ 5 /15 10/ 6 /15 10/ 7 /15 10/ 7 /15

Letter from M. Wentzel to E. Halpin dated October 7, 2015

SUBJECT:

SUMMARY OF THE SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT RELATED TO THE ENVIRONMENTAL REVIEW OF THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MF4019 AND MF4020)

DISTRIBUTION

HARD COPY
DLR RF E-MAIL: PUBLIC RidsNrrDlr Resource

RidsNrrDlrRpb1 Resource

RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource

RidsNrrDlrRsrg Resource

RidsOgcMailCenter Resource RidsNrrPMDiabloCanyon Resource ---------------------

MWentzel

JDanna RPlasse YDiaz-Sanabria SLingam CKanatas, OGC

JLindell, OGC

THipschman, SRI

JReynoso, RI GMiller, RIV DMcIntyre, OPA LUselding, OPA WMaier, RIV

AMoreno, OCA ENCLOSURE LIST OF PARTICIPANTS DIABLO CANYON POWER PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION ENVIRONMENTAL REVIEW SEVERE ACCIDENTS MITIGATION ALTERNATIVES SITE AUDIT September 21-23, 2015 PARTICIPANTS ORGANIZATION Jerry Dozier U.S. Nuclear Regulatory Commission (NRC)

Michael Wentzel NRC Bruce Schmitt Pacific Northwest National Laboratory (PNNL)

Bob Schmidt PNNL Nathan Barker Pacific Gas and Electric (PG&E) Al Bates PG&E Terry Grebel PG&E Tom Jones PG&E Dave Miklash PG&E Michelle Olsofsky PG&E John Pyo PG&E Jearl Strickland PG&E David Bidwell ERIN Engineering and Research, Inc. (ERIN)

Alex Duvall ERIN Donald MacLeod ERIN

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