ML20090L805
| ML20090L805 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 06/30/1976 |
| From: | Mayer L NORTHERN STATES POWER CO. |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9102120690 | |
| Download: ML20090L805 (4) | |
Text
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D'f7 ". 'b E Mr Victor Stello, Director Division of Operating Reactors f
JUL 2 1976 d
U S Nuclear Regulatory Comission u.s, em n y Washington, DC 20555 (ggy, sg 9
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Dear Mr Stello:
10NTICELID NUCLEAR GENERATING P! ANT Docket No. 50-263 License No. DPR-22 Withdrawal of PRT License Amendment Request Dated March 1. 1974 Over the past three years, we have been evaluating the effects of the shif t in end-of-cycle scram reactivity.
In early 1974, we proposed to install a Prompt Relief Trip system (PRT) to mitigate the effect of the shift. After a series of written and verbal com:nunications with your staff, we agreed in our May 22, 1975 letter to amend or re-submit our description and safety evaluation of the PRT system by June of 1976 should it be required in Cycle 5.
We later stated verbally that we no longer intend to install this system. 'Ihis letter is to formally document the final status of matters related to PRT.
We have concluded that PRT is not a viabic solution to the end-of-cycle scram reactivity situation because of licensing difficulties and potential undesirable operating characteristics.
Engineering and licensing efforts by General Electric have been terminated and Northern States Pwer no longer intends to i
install the system at Monticello. Alternative means of dealing with the shift in scram reactivity are currently being evaluated. Any proposed action requiring your review in the future will be presented to you in a timely manner. Results frca Monticello transient analyses indicate that because of l
the 1::rge relief capacity and the amount of Iw exposure fuel l
at Monticello, no further action with respect to scram reactivity is necessary for the next two years and most likely for a third year.
l 663a 9102120690 760630 PDR ADOCK 05000263 P
NORT IRN OTATED POWER Coh ANY Mr Victor Stello Jut.e 30, 1976 Technical Specifications changes related to l'RT were included in our License Amendment Request dated March 1,1974 and have not been acted upon. We request that the unissued portions of the March 1,1974 License Amendment Request be withdrawn.
Yours very truly, h.
j L 0 Mayer, PE Manager, Nuclear Support Services LoMhntv/cmh Attachment cct J G Keppler G Charnoff MPCA Attn: J W Ferman MCCCA Attn: II J Vogel City of St Paul Attn:
D L Ficker S J Gadler 4
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j UNITED STATES NUCLEAR REGU1ATORY COMMISSION NORTHERN STATES POWER CGtPANY 1
MONTICELLO NUCL1AR GENERATING PLANT l
Docket No. 50-263 i
i License No. DPR-22 2
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LETTER DATED JUNE 30, 1976 Withdrawal of License Amendment Request i
Dated March 1, 1974 d
i Northern States Power Company, a Minnesota corporation, by this letter j
dated June 30, 1976, hereby submits information on the status of the Prompt Relief Trip system (PRT) and requests that the unissued portions j
of the March 1,1974 License Amendment Request be withdrawn.
This request contains no restricted or other defense infomation.
I NORIMERN STATES POWER COMPANY l
I By GWe}AET) l L*7 Wachter i
Vice President, Power Production 6 System Operation i
On this 30th day of June 1976, before me a notary public in and for said i
County, personally appeared L J Wachter, Vice Prasident, Power Production and System Operation, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the contents thereof and that to the best of his knowledge, infomation and belief, the statements made in it are true and that it is not interposed for delay.
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Northern Sta,tes Power Company 6/30/76 I
Mr. Victor Stello Minneapolis, Minnesota oire )2f avio e
7 76 Mr. L. O. Mayer
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