ML20041E492

Ro:On 820225,RHR Svc Water MOV 1947 at Outlet from B RHR Heat Exchanger Would Not Close.A RHR Sys Had Previously Been Declared Inoperable

ML20041E492
Person / Time
Site:	Duane Arnold
Issue date:	03/01/1982
From:	Mineck D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
DAEC-82-147, NUDOCS 8203110006
Download: ML20041E492 (1)

Text

lowa Electric 1.ight .md the- Cempany March 1, 1982 DAEt,-82-147 Mr. James G. Keppler co Regional Administrator " O Region III O U. S. Nuclear Regulatory Conmission 799 Roosevelt Road FIECE!VED G1en Ellyn, IL 60137 g MAR] 0798 5 ~il

Subject:

Prompt Notification of a Y

[:$NPgua Reportable Occurrence '4 P File: A-118a, TE-4 0' ' sa

Dear Mr. Keppler:

This letter, telecopied to your office, is intended to satisfy the requirement for prompt notification of a Reportable Occurrence in accordance with Specification 6.11.2.a of the Duane Arnold Energy Center Technical Specifications.

Technical Spectfication paragraph (s) violated:

Description Occurrence:

During normal operation on 2/25/82 it was found that RHR service water MOV 1947 at the outlet from the "B" RHR heat exchanger would not close.

This valve is used to maintain a differential pressure between the "B" RHR and "B" RHR$W systems during system operation. The "B" RHRSW system was declared inoperable. This degraded condition affectively compromised the operability of the "B" containment spray system. Due to the "A" RHR (LPCI) system having previously been declared inoperable, a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> LC0 was entered per Technical Specification 3.5.A.6.

This written notification is being submitted late due to over sight.

Very truly yours, k fhh Daniel L. Mineck Chief Engineer Duane Arnold Energy Center DLM/JVS/pl cc: NRC Resident Inspector 8203110006 820301 PDR ADOCK 05000331 S PDR

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