ML17279A829
| ML17279A829 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 02/10/1988 |
| From: | Holahan G Office of Nuclear Reactor Regulation |
| To: | Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| TAC-67082, NUDOCS 8802230239 | |
| Download: ML17279A829 (5) | |
Text
Docket No. 50-397 February 10, 1988 Mr. G.
C. Sorensen, Manager Regulatory Programs Washington Public Power Supply System P.O.
Box 968 3000 George Washington Way Richland, Washington 99352
Dear Mr. Sorensen:
SUBJECT:
EMERGENCY TECHNICAL SPECIFICATION CHANGE - DRYWELL PURGE LIMIT This confirms our oral authorization given on February 5, 1988 for a one-time change to the WNP-2 technical Specifications regarding drywell.purging.
Technical Specification 3.6.1.8 is revised to allow 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> of purging time during the current 365 day period, which ends on April 10, 1988.
Thereafter, Technical Specification 3.6.1.8 reverts to 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per year.
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I The basis for the time limitation on purging is to limit the probability of a LOCA while the purging system.'is. in service.
You have argued that the proposed rate of purging of 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> during the 62 days remaining in the current period is equivalent to the allowable annual rate of 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per 365 days and therefore the probability of a LOCA during purging in the next 62 days will be no greater than allowed by the current limit.
The staff has concurred that" with the additiona't tendays being allowed, the probability remains acceptably low without any additional compensatory measures.
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A formal amendment will be issued in the near future.
Sincerely, QV~
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'tq'X CYXappM gWl~g Gary M. Holahan, Assistant Director for Regions III and V
Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation cc:
See next page DISTRIBUTION v~
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Mr. G.
C. Sorensen, Manager Washington Public Power Supply System WPPSS Nuclear Project Ho.
2 (WNP-2)
CC:
Nicholas S. Reynolds, Esq.
- Bishop, Cook, Purcell
& Reynolds 1200 Seventeenth
- Street, N.W.
Washington, D.C.
20036 Mr. G.
E. Doupe, Esquire Washington Public Power Supply System P. 0.
Box 968 3000 George Washington Way Richland, Washington 99532 Mr. Curtis Eschels, Chairman Energy Facility Site Evaluation Council Mail Stop PY-ll Olympia, Washington 98504 P. L. Powell, Licensing Manager Washington Public Power Supply System P. 0.
Box 968, MD 956B Richland, Washington 99352 Mr. A. Lee Oxsen Assistant Managing Director for Operations Washington Public Power Supply System P. 0.
Box 968, MD 1023
- Richland, WA 99352 R. B. Glasscock, Director Licensing and Assurance Washington Public Power Supply System P. 0.
Box 968, MD 280 Richland, Washington 99352 Mr. C.
M. Powers WNP-2 Plant Manager Washington Public Power Supply System P. 0.
Box MD 927M Richland, Washington 99352 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Chairman Benton County Board of Commissioners
- Prosser, Washington 99350
Docket No. 50-397 Mr. G.
C. Sorensen, Manager Regulatory Programs Washington Public Power Supply System P.O.
Box 968 3000 George Washington Way Richland, Washington 99352
Dear Mr. Sorensen:
SUBJECT:
EMERGENCY TECHNICAL SPECIFICATION CHANGE - DRYWELL PURGE LIMIT This confirms our oral authorization given on February 5, 1988 for a one-time change to the WNP-2 technical Specifications regarding drywell purging, Technical Specifiication 3.6.1.8 is revised to allow 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> of purging time during the current 365 day period, which. ends on April 10, 1988.
Thereafter, Technical Specification 3.6.1.8 reverts to 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per year.
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The basis for the time limitation on purging is to limit the probability of a LOCA while the purging, system is in service.
You have argued that the proposed rate of purging of 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> during the 62 days remaining in the current period is equivalent to the all'owable annual rate of 90'ours"per 365 days and therefore the probabilitygof a LOCA during purging in the next 62 days will be no greater than allowed by/the current limit.
The staff has concurred that with the additional ten days, being allowed, the'probability remains acceptability low without any additional compensating measu'res.-
A formal amendment will b'e issu d in 'the near future.
Sincerely,
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See next page DISTRIBUTION NRC 5 PDRs PDV Reading DMCrutchfield GMHolahan RSamworth CTrammell JLee Gary M. Holahan, Assistant Director for~Regions III and V
Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
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