ML060330121
| ML060330121 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/27/2006 |
| From: | Wang A Plant Licensing Branch III-2 |
| To: | Kennan J Pacific Gas & Electric Co |
| Wang A, NRR/DLPM, 415-1445 | |
| References | |
| TAC MC8207, TAC MC8206 | |
| Download: ML060330121 (4) | |
Text
January 27, 2006 Mr. Jack S. Keenan Senior Vice President and CNO Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001
SUBJECT:
DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION ON LICENSE AMENDMENT REQUEST FOR RECOVERY OF LOW-POWER TESTING TIME - IMPACT ON THE REACTOR VESSEL INTEGRITY ASSESSMENTS (TAC NOS. MC8206 AND MC8207)
Dear Mr. Keenan:
By letter dated August 23, 2005, the Pacific Gas and Electric Company (the licensee) submitted a license amendment request (refer to PGE Letter No. DCL-05-098) that, if approved, would permit PGE to extend the license of the Diablo Canyon Power Plant, Units 1 and 2 (DCPP-1/2).
The licensee proposes to extend the license for the time period needed to perform low-power testing of the reactors prior to initial power operations. The licensees request is in conformance with the Nuclear Regulatory Commission (NRC) policy established in SECY-98-296, Agency Policy Regarding Licensee Recapture of Low-Power Testing or Shutdown Time for Nuclear Power Plants (December 21, 1998).
A pressurized thermal shock (PTS) assessment is required by Title 10 of the Code of Federal Regulations (10 CFR), Section 50.61 and an upper shelf energy (USE) assessment is required by 10 CFR Part 50, Appendix G. The NRC staff has reviewed the impact of the license amendment request on the assessment for protecting the DCPP-1/2 reactor vessel (RV) against the consequences of PTS and on the assessment for maintaining adequate levels of USE in the RV beltline materials. The NRC staff has determined that it requires additional information to process the license amendment request. A request for additional information is enclosed. This request was discussed with Tom Grozan of your staff on January 17, 2006, and it was agreed that a response would be provided within 60 days of receipt of this letter.
If you or your staff have any questions concerning the resolution of this matter, please contact Alan B. Wang at (301) 415-1445.
Sincerely,
/RA/
Alan B. Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosure:
Request for Additional Information cc w/encl: See next page
January 27, 2006 Mr. Jack S. Keenan Senior Vice President and CNO Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001
SUBJECT:
DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION ON LICENSE AMENDMENT REQUEST FOR RECOVERY OF LOW-POWER TESTING TIME - IMPACT ON THE REACTOR VESSEL INTEGRITY ASSESSMENTS (TAC NOS. MC8206 AND MC8207)
Dear Mr. Keenan:
By letter dated August 23, 2005, the Pacific Gas and Electric Company (the licensee) submitted a license amendment request (refer to PGE Letter No. DCL-05-098) that, if approved, would permit PGE to extend the license of the Diablo Canyon Power Plant, Units 1 and 2 (DCPP-1/2).
The licensee proposes to extend the license for the time period needed to perform low-power testing of the reactors prior to initial power operations. The licensees request is in conformance with the Nuclear Regulatory Commission (NRC) policy established in SECY-98-296, Agency Policy Regarding Licensee Recapture of Low-Power Testing or Shutdown Time for Nuclear Power Plants (December 21, 1998).
A pressurized thermal shock (PTS) assessment is required by Title 10 of the Code of Federal Regulations (10 CFR), Section 50.61 and a upper shelf energy (USE) assessment is required by 10 CFR Part 50, Appendix G. The NRC staff has reviewed the impact of the license amendment request on the assessment for protecting the DCPP-1/2 reactor vessel (RV) against the consequences of PTS and on the assessment for maintaining adequate levels of USE in the RV beltline materials. The NRC staff has determined that it requires additional information to process the license amendment request. A request for additional information is enclosed. This request was discussed with Tom Grozan of your staff on January 17, 2006, and it was agreed that a response would be provided within 60 days of receipt of this letter.
If you or your staff have any questions concerning the resolution of this matter, please contact Alan B. Wang at (301) 415-1445.
Sincerely,
/RA/
Alan B. Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 DISTRIBUTION:
PUBLIC RidsNrrLplg (DTerao)
Enclosure:
Request for Additional Information LPLIV Reading RidsNrrPMAWang RidsRegion4MailCenter (BJones) cc w/encl: See next page RidsNrrLALFeizollahi RidsAcrsAcnwMailCenter RidsNrrDorl (CHaney/CHolden)
RidsOgcRp JMedoff RidsNrrDorlDpr ADAMS Accession Number: ML060330121 OFFICE LPL4/PM LPL4/LA LPL4/BC NAME AWang LFeizollahi DTerao DATE 1/27/06 1/27/06 1/27/06 OFFICIAL RECORD COPY E:\\Filenet\\ML060330121.wpd
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION LICENSE AMENDMENT REQUEST TO RECOVER LOW-POWER TESTING TIME DIABLO CANYON POWER PLANT, UNITS 1 AND 2 DOCKET NOS. 50-275 AND 50-323 OPERATING LICENSE NOS. DPR-80 AND DPR-82 By letter dated August 23, 2005, the Pacific Gas and Electric Company (PGE) submitted a license amendment request (refer to PGE Letter No. DCL-05-098) that, if approved, would permit PGE to extend the license of the nuclear reactors for the Diablo Canyon Power Plant, Units 1 and 2 (DCPP-1 for Unit 1 and DCPP-2 for Unit 2). The amount of time for extension of the operating licenses is based on the amount of time that PGE had expended performing low-power testing of the reactors prior to initial power operations. PGEs request is proposed in conformance with the Nuclear Regulatory Commission (NRC) policy established in SECY-98-296, Agency Policy Regarding Licensee Recapture of Low-Power Testing or Shutdown Time for Nuclear Power Plants [December 21, 1998]. With respect to assessing the impact of the proposed license amendment on the structural integrity assessment for protecting the reactor vessels (RVs) against pressurized thermal shock (PTS) (i.e., PTS assessment, which is mandated pursuant to Section 50.61 of Title 10 of the Code of Federal Regulations (10 CFR) and the structural integrity assessment for ensuring the RV beltline materials will maintain adequate levels of upper shelf energy (USE) (i.e., USE assessment, which is mandated pursuant to 10 CFR Part 50, Appendix G), the NRC staff has the following question:
1.
The license amendment request proposes to add approximately 37 months of full power operation for the DCPP-1 reactor and approximately 4 months of full power operation for the DCPP-2 reactor. The additional time at full power operations will expose the RV beltline materials for the DCPP-1/2 RVs to additional neutron radiation (i.e., increasing the neutron fluence - in units of n/cm2, E > 1.0 MeV). Therefore, to support anticipated approval of the license amendment, the NRC staff requests that PGE provide the Low-power Test Recovery-Impacted PTS and USE calculations for the DCPP-1/2 RV beltline materials, as assessed through to the revised Low-Power Test Recovery expiration dates for the units.
Diablo Canyon Power Plant, Units 1 and 2 cc:
NRC Resident Inspector Diablo Canyon Power Plant c/o U.S. Nuclear Regulatory Commission P.O. Box 369 Avila Beach, CA 93424 Sierra Club San Lucia Chapter ATTN: Andrew Christie P.O. Box 15755 San Luis Obispo, CA 93406 Ms. Nancy Culver San Luis Obispo Mothers for Peace P.O. Box 164 Pismo Beach, CA 93448 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, CA 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, CA 94102 Diablo Canyon Independent Safety Committee ATTN: Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D Monterey, CA 93940 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Richard F. Locke, Esq.
Pacific Gas & Electric Company P.O. Box 7442 San Francisco, CA 94120 City Editor The Tribune 3825 South Higuera Street P.O. Box 112 San Luis Obispo, CA 93406-0112 Mr. Ed Bailey, Chief Radiologic Health Branch State Department of Health Services P.O. Box 997414 (MS 7610)
Sacramento, CA 95899-7414 Mr. James D. Boyd, Commissioner California Energy Commission 1516 Ninth Street (MS 31)
Sacramento, CA 95814 Mr. James R. Becker, Vice President Diablo Canyon Operations and Station Director Diablo Canyon Power Plant P.O. Box 3 Avila Beach, CA 93424 Jennifer Tang Field Representative United States Senator Barbara Boxer 1700 Montgomery Street, Suite 240 San Francisco, CA 94111