ML20090M522
| ML20090M522 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 08/07/1975 |
| From: | Mayer L NORTHERN STATES POWER CO. |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9105030434 | |
| Download: ML20090M522 (4) | |
Text
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...s s-NSEB NONTHERH STATE 5 POWER COMPANY MIN H R A PCs.l S, MlN N E S OTA 5540%
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Dear Mr Ziemann:
MONTICELID NUCLEAR GENERATING pIANT Docket No. 50-263 License No. DPR-22 Additional Containment Design Information In the July 17, 1975, meeting in Bethesda it was agreed that information would be sub-mitted concerning th evaluation program undervay for our Mark I containment. nis evaluation is being i ducted in response to NRC letters dated February 14, 1975, and April 17, 1975, pursu.t to para. 5454f of 10CTR part 50. We previously responded to your letters with our fy 8 and 30 letters in which we provided a preliminary action plan to address the relfef valve and IDCA load concerns. Subsequent to that, and on our behalf, Cencral Electric transmitted to Mr Tedesco via Mr Stuart's June 13 letter a sunnary of the proposed Short Tenn Containment Program, which was referenced in our July 9 letter, and suggested that a review meeting be held in your Staff offices for further discussion. The July 17 meeting was the result of that suggestion. ne General Electric reference plant analysis that was discussed with you by General Electric on April 10 was further documented and updated to include the conruitments made on that date by Dr Gyorey's June 26, 1975, letter to Mr Maccary.
In addition, General Electric completed their work on the safety / relief valve vent clearing model. This has been transmitted to you via GE's July 8 letter, and the model is described in report NED-20942P.
To further supplement your review, General Electric has prepared a Mark 1 Containment Status Report. This report has been transmitted to the NRC by GE's July 31, 1975, letter to Mr A Giambusso from I F Stuart. This report sunnarizes the Mark 1 Short and Long Tenn Programs and provides status as of July 18, 1975, on the work that has been completed.
We have conducted a thorough review of the information presented by General Electric and our consultants and have evaluated the work done on the reference plant investi-gation performed by Cencral Electric this Spring.
In consideration of the facts that this material has been determined to be applicable to Monticello, and the extremely low probability of a 1DCA event occurring at our plant during the period of time required to ccruplete the Short Term Program, and the results of these investigations 9105030434 750007 DR ADOCK 05o 3
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NO /HERN CTATEO POWER C MPANY 1
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l Mr D L Ziemann i
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August 7, 1975 1
i to date, we have concluded that Monticello can continue operation without danger to public health and safety while evaluation work continues. As discussed wf t;. yc 2, the j
Short Tem Program is scheduled to be canpleted in September,1975,.and we will also i
be submitting our planned Long Tem Program course of action at that titne.-
t Yours very truly, 6&
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L 0 Mayer, PE l
Manager of Nuclear Support Services i
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Minnesota Pollution Control Agency 4
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UNITED STATES NUCIIAR REGULATORY CORilSSION l
NORTIIERN STATES POWER COMPANY
}DNTICELLO NUCLEAR GENERATING PLANT i
Docket No. 50-263
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License No. DPR-22 I
LETTER DATED AUGUST 7,1975 RESPONDING TO NRC REQUESTS FOR INFORMATION ON CONTAINMENT DESIGN Northern States Pwer Ccupany, a Minnesota corporation, by this letter dated August 7, 1975, hereby submits information in response to NRC i
requests dated February 14, 1975, and April 17, 1975, for analyses and programs related to containment design and performance.
Previous re-sponses by Northern States Power Company, dated May 8,1975, and May 30, 1975, were submitted without execution by the applicant under oath or affirmation so they have been specifically referenced in the attached letter.
This request contains no restricted or other defense information.
NORTl[ERN STATES PORER COMPANY Q$h By L'I Wachter Vice President, Power Production
& System Operation On this 7th day of August, 1975, before me a notary public in and for said County, personally appeared L J Wachter, Vice President, Pwer Production and System Operation, and being first duly sworn acknwledged that he is authorized to execute this document in behalf of Northern States Pwer Company, that he knws the contents thereof and that to the best of his knowledge, information and belief, the statements made in it are true and that it is not interposed for delay.
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@ ByCommission Empirs DENISE E. BRANAU NOTARY PUBUC-WINNE30TA HENNEPIN COUN1Y Oct10.1b81
N R C D l!.lBUTION FOR PART SO DOCKET f VERIAL e
(TEMPORARY FORM)
CONTROL NO: W93 FILE:
filOM: Northern states Power Co DATE OF DOC DATE REC'D LTR TWX RPT OTHER Hinneapolis, Mn 8 7 ~5 8-11-75 XXXX alG CC OTHER SENT NRC PDR vv5 TO:
Hr Ziemann one signed SENT LOCAL PDR l
CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:
1 50-263 XXXX ENCLOSURES:
DESCRIPTION:
Ltr notarized 8-7-75....re the 7-17-75 meeting with NRC staf f.... furnishing addl info concerning Mark I containembt design
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