ML20009G063

Ro:On 810506,investigation on RHR Heat Exchangers Determined That B Heat Exchanger Baffle Was Deformed at Bottom Allowing Bypass Flow.Cause Being Evaluated.Repairs on 2B RHR Heat Exchanger in Progress

ML20009G063
Person / Time
Site:	Brunswick
Issue date:	05/06/1981
From:	Dietz C CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
BSEP-81-0945, BSEP-81-945, NUDOCS 8108030294
Download: ML20009G063 (2)

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SNRC REGy -

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""""",m c- % u "e : ", . 3I lay 7 Al0 38 Brunswick Steam Electric Plant l P. O. Box 10429 Southport, NC 28461 May 6,1981 REG!ONAL DIRECTOR L DEPUTY DIRECTOR ASSISTANT TO DIRECTOR '

DIRECTOR, RRIT FILE: B09-13516 -@ ll/.E;> DIRECTOR; EPOS SERIAL: E3EP/81-0945 '

N DIRECTOR, ENF/INV f W DIRECTOR, ET!

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PUBLIC AFFAIRS OFFICER

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Mr. James P. O'Reilly, Director #

I U. S. Nuclear Regulatory Commission" Region II 101 Marietta Street, Suite 3100 y;7Fw l 5y[

Atlanta, GA 30303 BRUNSWICK STEAM ELECIRIC PLAVI, UNIT NO.1 -

I.ICENSE NO. DPR-71 DOCKET NO. S0-32S -

CONFIRMATION FACSIMILE OF AN IMMEDIATELY REPORTABIE EVENT, (2-81-49)

Dear Mr. O'Reilly:

This confirms the teleph ne conversation between Mr. R. M. Poulk, Jr.,

Regulatory Specialist, and Mr. C. Julian of your office at 0920 on May 6,1981 concerning an immediately reportable event.

While investigating the Unit No. 2 RHR heat exchangers to determia-,the status of the flow separation baffle, it was determined that the B heat exchanger baffle was deformed at the bottom allowing bypass flow. An investigation of the A heat exchanger determined that the' baffle was correctly oriented; however, additional testing determined that a higher than design value differential prussure would be experienced across its baffle at the required flow rate of 4,000 spe. As a result of this determination, this heat exchanger was declared inoperable and a unit shutdown was commenced.

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Repairs are in progress on the 2B RNR heat exchanger at the present time. The unit will be p1hed and maintained in cold shutdown using the A heat exchanger by maintaining the airimum flow required for cooldown through that heat exchanger. Prior to unit startup, both heat exchangers will be repaired and restored to normal service. Ja Engineering evaluation is being terformed to determine the cause of these failures and to ensure appropriate action is taken to prevent them in the future. This event is being reported under Technical Specification 6.9.1.81.

Very truly yours, d*.  %

C. R. Dietz, General Manager Brunswick Steam Electric Plant -

RMP/gvc cc: Mr. R. A. Hartfield Mr. V. Stello, Jr.

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