ML20090L567
| ML20090L567 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 03/01/1976 |
| From: | Mayer L NORTHERN STATES POWER CO. |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| 2124, NUDOCS 9102120420 | |
| Download: ML20090L567 (3) | |
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March 1, 1976
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,O Mr Victor Stello, Director
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Dear Mr Stello:
HONTICELID NUC12AR GENERATING PIANT Docket No. 50-263 License No. DPR-22 Establishment of Drywell-Torus Pressure Differentia _1 In accordance with discussions with the NRR staff on February 26, 1976, Northern States Pcuer Company will initiate measures to enhance the safety margins for the Monticello Plant Mark I Containment System by establishment of a differential pressure of at least 1 psi between the dry-well atmosphere and the tonis when the unit is in operation.
The Monticello Plant has been out of service since February 19, 1976 for maintenance. Access for inspection and maintenance has precluded establish-ment of containment and inerting conditions to operationally demonstrate the proposed measures. These procedures will be initiated when the re-l quired containment and inerting conditions have been established for unit restart, which is expected to take place later today. We will continue to maintain the 1 psi dryvell-torus differential by these interim operating procedures until other appropriate measures have been instituted.
Yours very truly, he L 0 Mayer, PE Manager of Nucicar Support Services l
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loH/ak cc: J G Keppler G Charnoff MPCA Attn: J W Terman 9102120420 760301 PDR ADOCK 05000263 P
e UNITED STATES NUCII.AR RECUIATORY COMMISSION NORTHERN STATES POWER COMPAhT HONTICELID NUCIIAR CENERATING PIANT Docket No. 50-263 License No. DPR-22 LETIER DATED MARCll 1, 1976 RESPONDING TO NRC RLyUESTS FOR INFORMATION ON CONTAINMENT DESIGN Northern States Pwer Company, a Minnesota corporation, by this letter dated March 1, 1976, hereby submits information in response to hKC y'
requests for information concerning the Mark 1 Containment.
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'Ihis request contains no restricted or other defense information.
i NORTHERN STATES POWER COMPANY
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i By CY W 2h;">
L *fWacht e r Vice President, Pwer Production j
& System Operation l
On this 1st day of
- March, 1976, before me a notary public in and for
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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 on behalf of Northern States Pwer i
Ccanpany, that he knws the contents thereof and that to the best of his knwledge, infonnation and belief, the statementa made in it are true and that j
it is not interposed for delay.
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U S. NUCLE Am atGULAYORY CC SS 60N OOCkt T NUM et m tm: Pomu 19S ir m rn.2rA NRC DISTRIBUTION rOn PART 50 DOCKE'i MATERIAL D*T"D'D CV""N' F ROM: Northern States PoNer Co.
To:
V. Stello Minneapolis, Minn.
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. DIS C RIP T ION ENCLOSumt Ltr. notarized 3-1-76...
Establishment of Drywell Torus Pressure Differential.....
(1 Signed & M C. Cy. Received)
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PLANT NAME:
Monticello SAFETY FOR ACTION / INFORM ATION ENVIRO (AR ns.7g
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PROJECT MANAGER:
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