ML20091L781

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Interim Deficiency Rept Re Small Break/Reactor Coolant Pump Operation Interaction During Primary Sys High Void Fraction Conditions.Investigation Incomplete.Next Rept Will Be Submitted by 840831
ML20091L781
Person / Time
Site: Midland
Issue date: 06/01/1984
From: Jackie Cook
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
30297, 79-03-#10, 79-3-#10, OL, OM, NUDOCS 8406080207
Download: ML20091L781 (4)


Text

Consumers power James W Cook h

hhf Vice President - Projects, Engineering and Construction General officos: 1945 West Pamall Road, Jackson, MI 49201 *(517) 788-0453 June 1, 1984 79-03 #10 Mr J G Keppler, Regional Administratior US Nuclear Regulatory Commission Region.III 799' Roosevelt Road Glen Ellyn, IL 60137

. MIDLAND ENERGY CENTER PROJECT DOCKET NOS 50-329 AND 50-330 SMALL BREAK / REACTOR COOLANT PUMP OPERATION INTERACTION FILE 0.4.9.28 SERIAL 30297

References:

CPCo letters to J G Ke-e

Subject:

1) Serial Howe

..:ed August 15, 1979

2) Serial Howe-2.

uated October 19, 1979

3) Serial Howe-25,~, dated February 8, 1980
4) Serial 9770, dated October 10, 1980
5) ' Serial 12010, dated May 29, 1981

'6)

Serial 14268, dated December 4, 1981

7) Serial 17540, dated July 9, 1982

-8)

Serial 22265, dated July 11, 1983

9) Serial 27996, dated February 1, 1984 This letter, as were the referenced letters, is an interim 10CFR50.55(e) report concerning a potentially unsafe situation with respect to the tripping of reactor cooiant pumps during certain primary system high void fraction conditions.

Consumers Power Company (CPCo) has recently received the results of the B&W Owners Group analysis concerning the_ reactor coolant (RC) pump trip issue. The report entitled " Analytical Justification for Treatment of

-RC Pumps Following Accident Conditions", B&W Document #77-1149091-00, is currently undergoing technical review by both Bechtel'and CPCo -- The review 8406000207 84060.1 0

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process is expected to be completed by June, 1984. This report will then be provided to the NRC staff for review.

It is expected that this report will provide'the staff with the additional information requested at the December 14, 1983 meeting.

s Another report, either interim or final, will be submitted on or before August' 31, 1984.

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Chief, Docketing & Services if l Lansing, MI 48913 U S Nuclear Regulatory Commission Office of the Secretary Washington, DC 20555

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. Midland,'MI 48640 Mr Wendell H Marshall.

Mr William D'Paton, Esq

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