ML19318A444
| ML19318A444 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 06/10/1980 |
| From: | Martin R Office of Nuclear Reactor Regulation |
| To: | Zudans J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8006230142 | |
| Download: ML19318A444 (2) | |
Text
BEGUuT0llY D02ET Hl.E CO
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UNITED STATES
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June 10,1980 Docket No. 50-282 306 MEliORANDUli FOR:
J. Zudans Equipment Qualification Branch, DE FROM:
R. Martin Operating Reactors Brar.ch #3, DL
SUBJECT:
PRAIRIE ISLAl D PURGE & VENT VALVES - LONG TER1 MECHANICAL OPERABILITY I am responding to E. Reeves' memo of 6/2/80 to all PM's.
The following is a list of the documentation and applicable comments on this subject to date.
.9/27/79 Subject letter sent to fiorthern States Power (NSP).
10/1/79 Request for Additional Information (RAI) from G. Lairias, PSB, DOR.
10/29/79 Letter sent to USP trasmitting interim position for valve operation pending resolution of operability issue.
11/14/79 NSP response to NRC letter of 9/27/79.
Says valves will be closed when above cold shutdown.
Also says valve vendor is being requested to develop information to show valves will close in event of LOCA.
As of 6/5/80, NSP says this work is ongoing.
NSP did not identify a completion date for it.
They rely on keeping the valves closed when above cold shutdown having operated in this manner for about one year.
12/17/79 RAI memo from PSB on electrical aspects.
12/27/79 Memo from E. Reeves to all FM's requesting Pli evaluation relative to the Interim Position of 10/29/79.
1/9/80 NRC letter to HSP on electrical aspects.
1/25/80 Clarification notes on the 9/27/80 letter.
s ooesaol41 P
. 3/6/80 Telecopy from NRC to NSP requesting evaluation relative to BTP CSB 6-4, Rev. 1.
3/12/80 Memo from ORB #1 on status of conformance of Prairie Island to Interim Position.
3/17/80 USP letter to NRC responding to staff's 1/9/80 letter and to the 3/6/80 telecopy on BTP 6-4.
4/12/80 NSP letter to NRC on radiological consequences of LOCA with the valves open at the beginning but closing on demand.
4/' 0/80 PM's evaluation of NSP's 11/14/79 lette*
3 Conclusion Prairie Island meets the interim position. Work to qualify the valves was authorized in March, 1980.
An estimate of three months was provided to complete that work.
The Henry-Pratt valves, the Prairie Island type, are being qualified in a group effort to include the plants using this valve type. NSP will provide a more precise estimate of a submittal date at a later time.
I will then inform you of that date.
5 at>bs.
/ Robert-. Martin Operating Reactors Branch #3 Division of Licensing l
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