ML16342D402
| ML16342D402 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 08/07/1996 |
| From: | Steven Bloom NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| References | |
| GL-92-01, GL-92-1, TAC-M92669, TAC-M92670, NUDOCS 9608130109 | |
| Download: ML16342D402 (8) | |
Text
gag RE0(
+
nO I
+r gO
+w*w+
III UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2055&4001 August 7, 1996 5o-7-75>>~
Hr. Gregory H. Rueger Pacific Gas and Electric Company NPG - Hail Code AlOD P. 0.
Box 770000 San Francisco, California 94177 SUMECT:
CLOSEOUT FOR PACIFIC GAS AND ELECTRIC COMPANY RESPONSE TO GENERIC LETTER 92-01, REVISION 1, SUPPLEHENT 1
FOR THE DIABLO CANYON NUCLEAR POWER PLANT UNIT NOS..1 AND 2 (TAC NOS.
H92669 AND H92670)
Dear Hr. Rueger:
On Hay 19, 1995, the NRC issued Generic Letter 92-01, Revision 1, Supplement 1
(GL 92-01, Rev.
1, Supp.
1), "Reactor Vessel Structural Integrity."
In GL 92-01, Rev.
1, Supp.
1, the NRC requested that nuclear licensees perform a
review of their reactor pressure vessel structural (RPV) integrity assessments in order "to identify, collect, and report any new data pertinent to [the]
analysis of [the] structural integrity of their reactor pressure vessels (RPVs) and to assess the impact of that data on their RPV integrity analyses relative to the requirements of Section 50.60 of Title 10 of the Code of Federal Regulations (10 CFR 50.60),
10 CFR 50.61, Appendices G and H to 10 CFR Part 50 (which 'encompass pressurized thermal shock (PTS) and upper shelf energy (USE) evaluations),
and any potential impact on low temperature overpressure (LTOP) limits or pressure-temperature (P-T) limits."
Hore specifically, in GL 92-01, Rev.
1, Supp.
1, the NRC requested that addressees provide the following information in their responses:
(1) a description of those actions taken or planned to locate all data relevant to the determination of RPV integrity, or an explanation of why the existing data base is considered complete as previously submitted; (2) an assessment of any change in best-estimate chemistry based on consider ation of all relevant data; (3) a determination of the need for the use of the ratio procedure in accordance with the established Position 2. 1 of Regulatory Guide (RG) 1.99, Revision 2, for those licensees that use surveillance data to provide a basis for the RPV integrity evaluation; and (4) a written report providing any newly acquired data as specified above and (1) the results of any necessary revisions to the evaluations of RPV integrity in accordance with the requirements of 10 CFR 50.60, 10 CFR 50.61, Appendices G and H to 10 CFR Part 50, and any potential impact on the LTOP and P-T limits in the technical specifications, or (2) a certification that previously submitted evaluations remain valid.
9608i30i09.-960807 PDR ADQCK 05000275 P
PDR gpss Rg CRT@~
4 P
l
Mr. Gregory H. Rueger J
I l'I Revised evaluations and certifications were to include consideration of Position 2.1 of RG 1.99, Revision 2, as applicable, and'any,new data.,
The information in Reporting Item (1) was to be, submitted within,90 days of the
'ssuance of the GL.
The information in Reporting, Items (2), '(3),
and (4) was to be submitted within 6 months of the i,ssuance of the GL..
The NRC staff has noted that Pacific Gas,, and.Electric Company submitted the information requested in Reporting Items(1) 'through',(4) on August 16, 1995.
Since Pacific Gas and Electric has submitted, the reque'sted',information,and has indicated that the previously submitted evaluations remain, valid,'the staff considers the RPV integrity data for the Diablo Canyon Nuclear Power Plant, Unit Nos.
1 and 2, to be complete at this time..The'taff therefore concludes that no additional information regarding the structural integrity of the RPV at the Diablo Canyon Nuclear Power Plant, Unit Nos.
1 and 2, is available at this time, and that your efforts regarding GL 92-01, ReV., 1,Supp.
1 are complete.
This completes all actions related to the referenced TAC numbers.
Thank you for your cooperation.
Sincerely, Original s'.gned by:
Steven D. Bloom, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos.
50-275 and 50-323 cc:
See next page DISTRIBUTION Docket File PDIV-2 Reading EGAl SBloom ACRS
- KPerkins, WCFO DMcDonald PUBLIC JRoe WBateman EPeyton
- OGC, 015818
- JDyer, RIV JMedoff DOCUMENT NAME:
DC92669.LTR OFC PDIV-2 LA NNIE Elean DATE 8
96 PDIV-2 M
SBl oo 8
96 OFFICIAL RECORD COPY FI
e I,
lt E
I E
.t I
T tt I
Jj lt I
t Wr' I
1'l tt tl
/
tl I
E t
t'I I,
Mr. Gregory M. Rueger Revised evaluations and certifications were to include consideration of Position 2. 1 of RG 1.99, Revision 2, as applicable, and any new data.
The information in Reporting Item (1) was to be, submitted within 90 days of the issuance of the GL.
The information in Reporting Items (2), (3),
and (4) was to be submitted within 6 months of the issuance of the GL.
The NRC staff has noted that Pacific Gas and Electric Company submitted the information requested in Reporting Items (1) t'hrough (4) on August 16, 1995.
Since Pacific Gas and Electric has submitted the requested information and has indicated that the previously submitted evaluations remain valid, the staff considers the RPV integrity data'or the Diablo Canyon Nuclear Power Plant, Unit Nos.
1 and -2, to be complete at this time.
The staff therefore concludes that no additional information regarding the structural integrity of the RPV at the Diablo Canyon Nuclear Power Plant, Unit Nos.
1 and 2, is available at this time, and that your efforts regarding GL 92-01, Rev.
1, Supp.
1 are complete.
This completes all actions related to the referenced TAC numbers.
Thank you for your cooperation.
Sincerely, Original s'.gned by:
Steven D. Bloom, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos.
50-275 and 50-323 cc:
See next page
~OI I I ONION Docket File PDIV-2 Reading EGAl SBl oom ACRS
- KPerkins, WCFO DMcDonald PUBLIC JRoe WBateman EPeyton
- OGC, 015B18
- JDyer, RIV JMedoff DOCUMENT NAME:
DC92669.LTR OFC PDIV-2 LA NAME EPeeYn DATE 8
96 PDIV-2 M
SBl oo 8
96 OFFICIAL RECORD COPY
I
Mr. Gregory M. Rueger CC:
NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 1100 11th Street, Suite 311 Sacramento, California 95814 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. 0.
Box 164 Pismo Beach, California 93448 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, California 94102 Mr. Steve Hsu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94232 Diablo Canyon Independent Safety Committee ATTN:
Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D
Monterey, California 93940 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 5 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Christopher J. Warner, Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Robert P.
Powers Vice President and Plant Manager Diablo Canyon Nuclear Power Plant P. 0.
Box 56 Avila Beach, California 93424
0 C ~