ML20244D708

Requests Clarification as to Acceptable Containment Integrated Leak Rate Test Methods by 860307.Problems Occur When Facilities Pass W/Use of One Method But Fail by Another.Licensees Currently Use Three Computation Methods

ML20244D708
Person / Time
Issue date:	02/26/1986
From:	Partlow J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:	Eisenhut D Office of Nuclear Reactor Regulation
Shared Package
ML20244D710	List: DD-87-02, Informs That Secy Received Ltr from Professor Z Reytblatt Requesting Review by Commission of Directors Decision DD-87-02.On Advice of Ofc of General Counsel,There Is No Adjudicatory Prohibition in Circulating Professor Ltr ML20244D708 ML20244D778 ML20244E095 ML20244E482 ML20244E507 ML20244E518 ML20244E520 ML20244E526 ML20244E529 ML20244E533 ML20245A325 ML20245A347 ML20245A352 ML20245A357 ML20245A360 ML20245A364 ML20245A369 ML20245A371 ML20245A381 ML20245B280 ML20246M232
References
TAC-52665, NUDOCS 8603040164
Download: ML20244D708 (2)

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February 26,19S6 Darrell G. Eisenhut, Deputy Director MEMORANDUM FOR:

Office of Nuclear Reactor Regulation James G. Partlow, Director Division of Inspection Programs FROMi Office of Inspection and Enforcement CONTAINMENT INTEGRATED LEAK RAT FOR GUIDANCE ON ACCEPTABILITY OF

SUBJECT:

tly there Regional inspection of perfomance of CILRTs t ble to NRR Section !!!.A.3(a) of App. J statesith the prov with respect to 10 CFR ED, Appendix J.

that all CILRTs "...shall be conducted in accordance wAN51 N45.4 provid the American National Standard (ANSI) N45.4 1972...*

h d" and the

• reference-two different test methods which are the

• absolute me In addition, two methods of leak rate computation are ANSI M45.4. These specified for use when perfoming the " absolute method" of vessel method".

ANSI W45.4 also consist of the ' point to point

• and " total time

• methods.

test method used requires CILRT test duration,to be at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for any d

h e the leak rate with the exception of those accepted, abbreviated metho s w er can be accurately dete6nined during the shorter test period.

mputation Currently. licensees are utilizing three different CILRT test co d in ANSI M45.4), a methods which consist of the

• total time" method (specifie l

t EN-TOP-1, shortened time duration method (provided by Sechtel Topica 56.6-1981 which Rev.1), and the " mass point

• method (described in AN51/AN was issued to replace ANSI W45.4).

point

• method to esiculate containment integrated leakage ra hd provides more accurate results than the " total t thod of BN-TO i

i that ir, prove to detemine the integrated lestage rate.' total t'ime* met the accuracy of the test.

ble has been The lack of clear guidance as to which test methods are accep l t here it was most recently demonstrated at the Catawba nu

~

h *mtss point" l time

• method.

computational method but had failed when using the ' tota EU3 Q Q I 6) 99 g

t Darrell G. E'itinhut ctions,IE In order to facilitate the proper performance of CILRT T test methods are headquarters requests clarification as to which CILR considered to be acceptable to NRR.

appreciated.

etnintt stCC SY-gut C. rMLOW James G. Partlow Director j

Division of Inspection Programs Office of Inspection and Enforcement Distribution:

DC5 016 CRPB Reading i

DI Reading S.A. McNeil. IE

. L.L. Whet 1er, SE P.F. McKee, IE R.L. Spessard, IE J.G. Partlow, IE E.L. Jordan, !E R.H. Vollmer, IE l

J.M. Taylor, IE 4.M. Chung, R1 H.L. Whitener, RII F.A. Maura, R111 J.I. Tapia, RIV C.A. Clark, RV See previous concurrence)

Concurrence

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