ML16342C691
| ML16342C691 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 10/05/1994 |
| From: | Quay T Office of Nuclear Reactor Regulation |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16342C692 | List: |
| References | |
| TAC-M88648, TAC-M88649, NUDOCS 9410120265 | |
| Download: ML16342C691 (8) | |
Text
Hr. Gregory H. Rueger Nuclear Power Generation, B14A Pacific Gas and Electric Company 77 Beale Street, Room 1451
'.O.
Box 770000 San Francisco, California 94177 October 5, 199~
SUBJECT:
DIABLO CANYON NUCLEAR POWER PLANT, UNIT NOS.
1 AND 2 ASHE CODE SECTION III RELIEF REQUEST (TAC NOS.
H88648 AND H88649)
Dear Hr. Rueger:
Your January 25, 1994, letter requested relief for Diablo Canyon Power Plant, Units 1 and 2, from the 1968 ASME Code Section III, Article 9, Section N-910.8 stop valve control and interlock requirements.
You requested this relief because the volume control tank (VCT) and regenerative heat exchanger (RHE) relief valve discharge line block valves in both Unit 1 and Unit 2 do not have positive controls and interlocks.
ASHE Code Section N-910.8 requires positive controls and interlocks on stop valves in relief valve discharge lines.
We have granted relief from the 1968 ASME Section III, Article 9, Section N-910.8 control and interlock requirements for the VCT and RHE relief valve discharge line stop valves identified in our enclosed safety evaluation.
This relief allows you to use specific administrative controls on these block valves at Diablo Canyon instead.
Pursuant to 10 CFR 50.55a(a)(3)(ii),
we find that you have demonstrated that complying with Code requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.
We also conclude that granting relief would not result in unacceptable consequences or impair the ability to shut the plant down during normal operation or accident conditions.
The enclosed safety evaluation contains our review results.
~
~
Sincerely, heodore R. jjuay, Director Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos.
50-275 and 50-323
Enclosure:
Safety Evaluation cc w/encl:
See next page
- See revious concurrence DISTRIBUTION:
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October 5, 1994 Hr. Gregory H. Rueger Nuclear Power Generation, B14A Pacific Gas and Electric Company 77 Beale Street, Room 1451 P.O.
Box 770000 San Francisco, California 94177
SUBJECT:
DIABLO CANYON NUCLEAR POWER PLANT, UNIT NOS.
1 AND 2 ASHE CODE SECTION III RELIEF RE(VEST (TAC NOS.
H88648 AND H88649)
Dear Hr. Rueger:
Your January 25, 1994, letter requested relief for Diablo Canyon Power Plant, Units 1 and 2, from the 1968 ASHE Code Section III, Article 9, Section N-910.8 stop valve control and interlock requirements.
You requested this relief because the volume control tank (VCT) and regenerative heat exchanger (RHE) relief valve discharge line block valves in both Unit 1 and Unit 2 do not have positive controls and interlocks.
ASHE Code Section N-910.8 requires positive controls and interlocks on stop valves in relief valve discharge lines.
We have granted relief from the 1968 ASHE Section III, Article 9, Section N-910.8 control and interlock requirements for the VCT and RHE relief valve discharge line stop valves identified in our enclosed safety evaluation.
This relief allows you to use specific administrative controls on these block valves at Diablo Canyon instead.
Pursuant to 10 CFR 50.55a(a)(3)(ii),
we find that you have demonstrated that complying with Code requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.
We also conclude that granting relief would not result in unacceptable consequences or impair the ability to shut the plant down during normal operation or accident conditions.
The enclosed safety evaluation contains our review results.
Sincerely, Theodore R. quay, Director Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos.
50-275 and 50-323
Enclosure:
Safety Evaluation cc w/encl:
See next page
- See revious concurrence DISTRIBUTION:
Docket File, T-5C3 WRussell/FMiraglia RSpessard JRoe DFoster-Curseen GHammer Tguay GHill (2), T-5C3 OPA JHitchell, EDO PDIV-2 R/F NRC 8 Local PDRs RZimmerman JLieberman EAdensam MPadovan OGC EJordan ACRS (10), T-2E26 OC/LFDCB, T-9E10
- KPerkins, RIV/WCFO SPeterson OFC:
DRPW LA PD4-2 PM*
PD4-EMEB*
SRXB*
OGC*
PD4-2 D
NAME:
DATE:
DFoster-Cu seen 10/ /94 OFFICIAL RECORD COPY LPadovan:
k 8/9/94 Tguay SPete son RWessman RJones STurk 10/
/94 8 19 94 8/22 94 9
16 94 10/
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DC88648.REL
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 5, 1994 Hr. Gregory H. Rueger Nuclear Power Generation, B14A Pacific Gas and Electric Company 77 Beale Street, Room 1451 P.O.
Box 770000 San Francisco, California 94177
SUBJECT:
DIABLO CANYON NUCLEAR POWER PLANT, UNIT NOS.
1 AND 2 ASHE CODE SECTION III RELIEF RE(VEST (TAC NOS.
H88648 AND H88649)
Dear Hr. Rueger:
Your January 25, 1994, letter requested relief for Diablo Canyon Power Plant,-
Units 1 and 2, from the 1968 ASHE Code Section III, Article 9, Section N-910.8 stop valve control and interlock requirements.
You requested this relief because the volume control tank (VCT) and regenerative heat exchanger (RHE) relief valve discharge line block valves in both Unit 1 and Unit 2 do not have positive controls and interlocks.
ASHE Code Section N-910.8 requires positive controls and interlocks on stop valves in relief valve discharge lines.
We have granted relief from the 1968 ASHE Section III, Article 9, Section N-910.8 control and interlock requirements for the VCT and RHE relief valve discharge line stop valves identified in our enclosed safety evaluation.
This relief allows you to use specific administrative controls on these block valves at Diablo Canyon instead.
Pursuant to 10 CFR 50.55a(a)(3)(ii),
we find that you have demonstrated that complying with Code requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.
We also conclude that granting relief would not result in unacceptable consequences or impair the ability to shut the plant down during normal operation or accident conditions.
The enclosed safety evaluation contains our review results.
Docket Nos.
50-275 and 50-323
Enclosure:
Safety Evaluation cc w/enc'I:
See next page Sincerely, g~~2~g Theodore R. quay, Director Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
I
Hr. Gregory H. Rueger Pacific Gas and Electric Company Diablo Canyon 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 6715 Rocky Canyon Creston, California 93432 Hs.
Nancy Culver San Luis Obispo Mothers for Peace P. 0.
Box 164 Pismo Beach, California 93448 Hs. Jacquelyn C. Wheeler P. 0.
Box 164 Pismo Beach, California 93448 Managing Editor The Count Tele ram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. Truman Burns Hr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, California 94102 Hr. Steve Hsu Radiologic Health, Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower
- 5. Pavillio'n 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Hr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San
- Diego, Cal iforni a 92101 Christopher J.
- Warner, Esq.
Pacific Gas
& Electric Company Post Office Box 7442 San Francisco, California 94120 Hr. John Townsend Vice President and Plant Manager Diablo Canyon Power Plant P. 0.
Box 56 Avila Beach, California 93424 Diablo Canyon Independent Safety Committee ATTN:
Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D
Monterey, California 93940