ML17285A118
| ML17285A118 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 12/06/1988 |
| From: | Samworth R Office of Nuclear Reactor Regulation |
| To: | Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| Shared Package | |
| ML17285A119 | List: |
| References | |
| TAC-59158, NUDOCS 8812150083 | |
| Download: ML17285A118 (5) | |
Text
Docket No. 50-397 Mr. G.
C. Sorensen, Manager Regulatory Programs Washington Public Power Supply System Post Office Box 968 3000 George Washington Way
- Richland, Washington 99532 DISTRIBUTION NRC P
R Local PDR
'PD5 Rdg MVirgilio GHolahan GKnighton JLee RSamworth OGC EJordan BGrimes ACRS(10)
AThadani WHodges DLynch BAtefi (SAIC)
PEshelman (ESSA)
Dear Mr. Sorensen:
SUBJECT:
ATWS RULE 10 CFR 50.62 RELATING TO ARI AND RPT SYSTEMS (TAC NO. 59158)
The ATWS Rule (10 CFR 50.62, Requirements for Reduction of Risk from Anticipated Transients Without Scram (ATWS) Events for Light-Mater-Cooled Nuclear Power Plant" ) requires improvements in the design and operation of commercial nuclear power facilities to reduce the likelihood of failure to shutdown the reactor following anticipated transients, and to mitigate the consequences of an ATWS event.
The requirements for a boiling water reactor are to install an alternate rod injection (ARI) system, a standby liquid control system (SLCS) and to trip the reactor coolant recirculation pumps (RPT) automatically under conditions indicative of an ATWS.
Washington Public Power Supply System provided information by letters dated April 13, 1987 (G02-87-131) and June 24, 1988 (G02-88-142) concerning your implementation of the ATWS Rule.
We have reviewed this information and the updated FSAR information on the docket.
Based on this review, we have concluded that the'RI design is in compliance with the ATWS Rule.
However, the RPT design is not in full compliance with the ATWS Rule.
To achieve compliance with the ATWS Rule the RPT initiation logic should be modified to a coincident logic and relay testing features should be incorporated or a demonstration should be made to show how your design satisfies the objective of the ATWS Rule.
This modification or a demonstration that leads to acceptance should be completed before restart following the next refueling outage.
Our SER, which provides the review details regarding this conclusion, is enclosed.
Enclosures:
As stated cc:
See next page
[ATWS RULE 10 CFR 50.62]
original signed by Robert B. Samworth, Project Directorate Division of Reactor IV, V and Special Project Manager V
Projects - 'III, projects pol
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Docket No. 50-397 UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 December 6, 1988 Hr. G.
C. Sorensen, Manager Regulatory Programs Washington Public Power Supply System Post Office Box 968 3000 George Washington Way Richland, Washington 99532
Dear Hr. Sorensen:
SUBJECT:
ATWS RULE 10 CFR 50.62 RELATING TO ARI AND RPT SYSTEMS (TAC NO. 59158)
The ATWS Rule (10 CFR 50.62, Requirements for Reduction of Risk from Anticipated Transients Without Scram (ATWS) Events for Light-Water-Cooled Nuclear Power Plant" ) requires improvements in the design and operation of commercial nuclear power facilities to reduce the likelihood of failure to shutdown the reactor following anticipated transients, and to mitigate the consequences of an ATWS event.
The requirements for a boiling water reactor are to install an alternate rod injection (ARI) system, a standby liquid control system (SLCS) and to trip the reactor coolant recirculation pumps (RPT) automatically under conditions indicative of an ATWS.
Washington Public Power Supply System provided information by letters dated April 13, 1987 (G02-87-131) and June 24, 1988 (G02-88-142) concerning your implementation of the ATWS Rule.
We have reviewed this information and the updated FSAR information on the docket.
Based on this review, we have concluded that the ARI design is in compliance with the ATWS Rule.
However, the RPT design is not in full compliance with the ATWS Rule.
To achieve compliance with the ATWS Rule the RPT initiation logic should be modified to a coincident logic and relay testing features should be incorporated or a demonstration should be made to show how your design satisfies the'bjective of the ATWS Rule.
This modification or a demonstration that leads to acceptance should be completed before restart following the next refueling outage.
Our SER, which provides the review details regarding this conclusion, is enclosed.
Enclosures:
As stated cc:
See next page Robert B. Samworth, Project Directorate Division of Reactor IV, V and Special Project Manager V
Projects - III, projects
P
Hr. G. C. Sorensen, Manager Washington Public Power Supply System WPPSS Nuclear Project No.
2 (WNP-2)
CC Nicholas S. Reynolds, Esq.
- Bishop, Cook, Purcell
& Reynolds 1400 L Street NW Washington, D.C.
20005-3502 Hr. 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-11 Olympia, Washington 98504 Mr. Alan G. Hosier, Licensing Manager Washington Public Power Supply System P. 0.
Box 968, HD 956B Richland, Washington 99352 Hr. A. Lee Oxsen Assistant Managing Director for Operations Washington Public Power Supply System P. 0.
Box 968, HD 1023
- Richland, WA 99352 Hr. Gary D. Bouchey, Director Licensing and Assurance Washington Public Power Supply System P. 0.
Box 968, HD 280 Richland, Washington 99352 Mr. C. H. Powers WNP-2 Plant Hanager Washington Public Power Supply System P. 0.
Box HD 927M Richland, Washington 99352 Reg iona 1 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 Mr. Christian Bosted U. S. Nuclear Regulatory Commission P. 0.
Box 69 Richland, Washington 99352