ML19326B662

Forwards Final Rept AO 50-313/74-11B Promised in Util 750205 Ltr.Investigation Complete Except for Study Re Probability of Catastropic Failure of Schedule 10 Stainless Steel Piping Under Design Stresses

ML19326B662
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/29/1975
From:	Phillips J ARKANSAS POWER & LIGHT CO.
To:	Rusche B Office of Nuclear Reactor Regulation
Shared Package
ML19326B653	List: ML19326B651 ML19326B658 ML19326B662 ML19326B664 ML19326B670 ML19326B676 ML19326B683 ML19326B687 ML19326B691 ML19326B694
References
NUDOCS 8004170508
Download: ML19326B662 (3)

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( H E L PIN G U UILO A R o< A N S A S V)

ARK ANS AS POWER & LIGHT COMPANY 97H S. LOUISlANA STAEETS Lt?TLE ACCK. A AK ANSA S 72203 15013372-4311 August 29, 1975 s

Mr. B. C. Rusche, Director Office of Nuclear Reactor Regulation U. S. Nuc1 car Regulatory Commission Washington, D. C. 20555 / _

Subj ect: Arkansas Power S Light Company Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 Abnormal Occurrence Report No. 50-313/74-11B

Dear Mr. Rusche:

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My letter to Mr. Case of Februaly 5,1975, provided preliminary results of the investigations into the cause of leaks in the schedule 10 stain-less steel' reactor building spray system piping at Arkansas Nuclear One-Unit I and promised a final report upon completion of all investigations.

At this time all investigations are complete, with the exception of a study to determi.1e the probability of catcstrophic failure of the affected piping under design stresses. Attached find the final report promised in "

the November 1974 letter. 'lko copies of a more detailed report are also attached. Single etnies of the detailed report are also being provided i to the NRC Inspection and Enforcement Region II and IV offices.

Very truly yours, )

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/,// \' p' J. D. Phillips Senior Vice President ,

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MEMBE A MIODLE SOUTH UTILITIES SYSTEM fePY StWT REGION, 2 1

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Mr. B.-C. Rusche_ August 29, 1975 -

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• I i cc: . Mr. Norman C. Moseley,' Director Office of Inspection and Enforcement

• Region II U. S. Nuc1 car Regulatory Commission 230 Peachtree Street, N.W., Suite 818 Atlanta, Georgia' 30303

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Mr. E. Morris lloward, Director Office of Inspections 6 Enforcement Region IV

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U. S. Nuclear Regulatory Commission

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611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

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ADDENDUM i

3 This report is being sent to the ANO plant site for review concurrently  :

in order to expedite NRC review. This-report has not been endorsed by l

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plant ute personnel but has been prepared and reviewed by general office nuclear services personnel. A copy of the detailed report is ~

available at the plant site.

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