ML20024G249

Forwards Application for Amend to License DPR-22.Amend Revises Tech Specs to Permit Containment Integrated Leak Rate Tests to Be Terminated in Less than 24 H

ML20024G249
Person / Time
Site:	Monticello
Issue date:	09/02/1977
From:	Mayer L NORTHERN STATES POWER CO.
To:	Stello V Office of Nuclear Reactor Regulation
Shared Package
ML20024G250	List: ML20024G249 ML20024G253 ML20024G259
References
NUDOCS 9102080420
Download: ML20024G249 (3)

Text

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NORTHERN DTATES POWER COMPANY M f N N E A POLI t. MINNE SOTA 55401 1

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s September 2, 1977

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pi@@il l y v.s? 31977u 3 h Mr Victor Stello, Director b  % E i Division of Operating Reactors 4 c/o Distribution Services Branch, DDC, ADM N

U S Nuclear Regulatory Counission Nh_ W Washington, DC 20555 i

Dear Mr Stello:

MONTICELLO NUCLEAR GENERATING PIN G Docket No. 50-263 License No. DPR-22 License Amendment *aquest Dated September 2, 1977 Attached are three origincts and 37 confonned copies of a request for a change of Technical Specifications, Appendix A, of the Pro-visional Plant. Operating L'. cense for the Monticello Nuclear Generating The requested change would revise the Technical Specifications to permit' containment integrated leak rate tests to be terminated in less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The proposed test duration would be at least eight hours, be long enough to accumulate at 1 cast 20 sets of data points at approximately equal time intervals, and have a duration long enough to accumulate and analyze enough data to verify that the measured leakage rate, at the 957. confidence level is less than the test acceptance criterion.

Because of improved instrumentation, testing techniques, and the

• use of a small computer to perform leakage and error analysis f rapidly, we believe a valid containment integrated leakage rate test can be successfully completed in less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Our attached License Amendment Request contains a description of our proposed test procedure, instrumentation, and computational methods.

We believe this will demonstrate to your satisfaction that the leakage rate can be accurately determined during a shorter test period.

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'Mr Victor Stallo Page 2 September 2, 1977 The proposed Technical Specification changes are requested on an interim basis until changes requested in our License Amendment c Request dated January 30,1976 (as amended by our letter dated Hay 5,1976) are issued by the Commission. These changes address all aspects of conformance to 10CFR50, Appendix J, at Monticello.

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7 Lg To permit us to implement the requested change during the Autumn 1977 refueling outage containment test, we ack that this request be reviewed and approved no later than October 1, 1977.

4 Yours very truly, y h.

L 0 Mayer, PE Manager of Nuclear Support Services lam /DMH/deh cc: J G Keppler G Charnoff MPCA Attn: J W Ferman MCCCA Attn: H J Vogel S J Gadler

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