ML20038C614
| ML20038C614 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 12/01/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Mayer L NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20038C615 | List: |
| References | |
| NUDOCS 8112110278 | |
| Download: ML20038C614 (5) | |
Text
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DEC 0 1 1981 NRC PUK l
L'POR NSIC TERA Docket Hos. 50-232 ORB #3 Rdg and 50-306 DEisenhut OELD
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Dear Mr. Mayer:
Gray Files The Comission has completed the review of Northern States Power Company's response to our request by letter dated April 12, 1976 in regard to a single failure occurringin the Emergency Core Cooling System (ECCS) at the Prairic Island Nuclear Generating Plant Unit Nos. 1 and 2.
This review is based on your submittal of letters dated December 22, 1976 July 17, August 5 and September 10, 1981.
Based on our review of your submittals we find thilt you have adequately addressed our concerns related to the potential single failure of the ECCS ant your systems are acceptable in regard to this matter except for the following:
1.
As discussed with your staff, the open position of the valves in the crossover lines on the discharge side of the safety injection pumps should be assured during all operating modes except cold shutdown.
To resolve this concern we request that you propose a technical spect-fication change to Appendix A of the license within 45 days from the date of this letter. The proposed technical specification should address the open position of the specific valves for both units as a limiting condition for operation as described above.
2.
Safety related equipment in the ECCS and its associated subsystems that do not qualify for adequate radiation exposure levels should he added to the equipment qualification program. The implementation schedules of this equipment will be the same as those in your equip-aent qualifications program.
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. In c.onclusion, you should consider.the review of the single failure of' the ECCS and its associated subsystem for the Prairie Island Nuclear Generating Plant Unit Nos. 1 and 2 as being complete.
A copy of our Safety Evaluation Report and our consultant's report is enclosed.
Sincerely, Original c!gned by Robert A. Clark Robert A. Clark, Chief i
Operating Reactors Branch #3 Division of-Licensing
Enclosures:
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DEC 01I38I Docket Nos. 50-282 and 50-306 Mr. L. O. Mayer, Manager Nuclear Support Services Northern States Power Company 414 Nicollet Mall - 8th Floor Minneapolis, Minnesota 55401
Dear Mr. Mayer:
The Commission has completed the review of Northern States Power Company's response to our request by letter dated April 12, 1976 in regard to a single failure occurring in the Emergency Core Cooling System (ECCS) at the Prairie Island Nuclear Generating Plant Unit Nos. I and 2.
This review is based on your submittal of letters dated December 22, 1976, July 17, August 5 and September 10, 1981.
Based on our review of your submittals we find that you have adequately addressed our concerns related to the potential single failure of the ECCS and your systems are acceptable in regard to this matter except for the following:
1.
As discussed with your staff, the open position of the valves in the crossover lines on the discharge side of the safety injection pumps should be assured during all operating modes except cold shutdown.
To resolve this concern we request that you propose a technical speci-fication change to Appendix A of the license within 45 days from the date of this letter. The proposed technical specification should address the open position of the specific valves for both units as a limiting condition for operation as described above.
2.
Safety related equipment in the ECCS and its associated subsystems that do not qualify for adequate radiation exposure levels should be added to the equipment qualification program. The implementation schedules of this equipment will be the same as those in your equip-ment qualifications program.
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2-In conclusion, you should consider the review of the single failure of the ECCS and its associated subsystem for the Prairie Island Nuclear Generating Plant Unit Nos. 1 and 2 as being complete.
A copy of our Safety Evaluation Report and our consultant's report is enclosed.
Sincerely,
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C Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosures:
As stated cc: See next page
Northern States Power Company cc:
Gerald Charnoff, Esquire Bernard M. Cranum Shaw, Pittman, Potts and Trowbridge.
Bureau of Indian Affairs, DOI 1800 M Street, N.W.
15 South 5th Street Washington, D. C.
20036 Minneapolis, Minnesota 55402 Mr. Louis J. Breimburst Mr. R. L. Tan'nner Executive Director County Auditor Minnesota Pollution Control Agency Red Wing, Minnesota 55066 1935 W. County Road S2 Roseville, Minnesota 55113.
U. S. Environmental Protection Agency Federak Activities Branch The Environmental Conservation Library Region V Office
'jinneapolis Public Library ATTN:
Regional Radiation 300 Nicollet Mall Representative Minneapolis, Minnesota 55401 230 South Dearborn Street Chicago, Illinois 60604 lir. F. P. Tierney, Plant Manager Prairie. Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Jocelyn F. Olson, Esquire Special Assistant Attorney General
"'enesota Pc11uticn Control Agency 1935 E. County Rcad E2 Roseville, ".inneesta 55113 U.S. 'Juclear Regulatory Commission Resident 'nspectcrs Office Route =2, Box 500*
.leich, Mi nnesoti 550E9 e
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