ML20154H498

Comment Supporting Proposed Rule 10CFR50 Re Use of ANSI/ANS-56.8-1987 to Calculate Containment Leakage Rates

ML20154H498
Person / Time
Site:	Kewaunee
Issue date:	03/29/1988
From:	Hintz D WISCONSIN PUBLIC SERVICE CORP.
To:	NRC OFFICE OF THE SECRETARY (SECY)
References
CON-NRC-88-39, FRN-53FR5985, RULE-PR-50 53FR5985-00010, 53FR5985-10, NUDOCS 8805250375
Download: ML20154H498 (2)

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Uu PROP a u h Rul.E u m W- - 5 2/ % /d NRC-88-39 3 g gg-8 WPSC (41414331598 TELECOP1ER (414) 4331297 gSYLINK 62891993 WISCONS'fN PuBLIC SERVICE CORPORAfl0N 600 North Adams

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• Green Bay, WI 543o7 9002 88 MR 31 P4 :11 fo'cN10 i.,v ci 3RANW March 29, 1988 Secretary of the Commission Attention Docketing and Service Branch U. 5. Nuclear Regulatory Commission Washington, D.C. 20555 Gentlemen:

Docket 50-305 Operating License DPR-43 Kewaunee Nuclear Power Plant Coments on Proposed Rule Allowing the Use of ANS!/ANS-56.8-1987 (Mass Point Technology) to Calculate Containment Leakage Rates Federal Register 5985, Monday, February 29, 1988, Vol. 53 No. 29

References:

1) D. C. Hintz to NRC Office of Administration, Comments on Duke Power Company's Amendments to Facility Operating Licenses, September 11, 1986

2) O. C. Hintz to NRC, Comments on Proposed 10 CFR 50, Appendix J.

April 24, 1997 Wisconsin Public Service Corporation (WPSC) concurs with the NRC on its position to allow the use of mass point methodology in the calculation of containment leakage rates. The above references document WPSC's support for this tech-nically superior method of calculating containment leakage. The use of this method should yield a more accurate indication of actual leakage rates.

For these reasons WPSC supports the proposed rule to allow the use of mass point methodology with one exception. The proposed rule requires a 24-hour test dura-tion. This time limit appears arbitrary and is in conflict with ANSI /ANS 56.8-1987 "Containment System Leakage Testing Requirements." Section 5.4 of this ANSI /ANS standard states the following with regard to test duration: "The duration of the test period must be sufficient to enable adequate data to be accumulated and statistically analyzed" and, "A type A test shall last a minimum of eioht hours after stabilization." WPSC therefore encourages the NRC to eli-minate the 24-hour test duration in favor of criteria consistent with the ANSI /ANS standard, h52 375 080329 30 53FR5985 pon

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Secretary of ti.e Comission March 29, 1988 Page 2 It is hoped that this proposed rule reflects an NRC trend toward incorporating more modern and accurate testing methods which will eliminate unnecessary con-servatisms while maintaining plant safety.

Sincerely, D. C. Hintz Vice President - Nuclear Power ALH/jms cc - Mr. Robert Nelson, US NRC US NRC, Region !!I US NRC Document Control Desk

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