ML20040G695

Interim Deficiency Rept Re Pneumatic Logic for Delaval Standby Diesel Generators,Initially Reported 811231.Engines Could Be Shut Down on 2-out-of-6 Logic.Vendor Evaluating Condition.Next Rept by 820324

ML20040G695
Person / Time
Site:	Grand Gulf
Issue date:	02/01/1982
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-82-53, NUDOCS 8202160381
Download: ML20040G695 (3)

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MISSISSIPRtWOWER & LIGHT COMPANY l ' Helping Build Mississippi P. O. B O X 16 4 0. J A C S Oy, MIS SIS SIP PI 3 9 2 0 5 JAMES P. McGAUGHY, JR.

• ssisvam va msaur lJ f.3 A February 1, 1982

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Office of Inspection & Enforcement -

U. S. Nuclear Regulatory Commission x i Region II g

101 Marietta Street, N.W.

Suite 3100

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Atlanta, Georgia 30303 ',

Attention: Mr. J. P. O'Reilly, Regional Administrator -y ,

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SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2

~

,_ Docket Nos. 50-416/417 File 0260/15525/15526 PRD-81/53, Status Report, Pneumatic Logic for the Delaval Standby Diesel Generators AECM-82/53 On December 31, 1981, Mississippi Power & Light Company notified Mr. R.

Butcher, of your of fice, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns the pneumatic logic of the Delaval Standby Diesel Generators.

Our investigation into this matter is continuing. The determination of reportability under the provisions of 10CFR50.55(e) has not been made. Our Status Report is attached and we expect to submit our Final Report on or before March 24, 1982.

Yours truly, J. P. McGaughy, Jr.

ACP:dr ATTACHMENT cc: See page 2

a 8202160381 820201 'UNIAL CO# '

PDR ADOCK 05000416 ,-

S PDR Member Middle South Utilities System 1 b5 17 t - -

_ _ _ - - - '/

.9l l Mr. J. P. O'Reilly AECM-82/53

.NRC Page'2' ,

cc: Mr. N. L. Stampley Mr. R. B. McGehee '

Mr. T. B. ' Conner Mr. Richard C. DeYoung, Director l

- Of fice of Inspection & Enforcement U. ' S. Nuclear Regulatory' Commission Washington, D.C. 20555 Mr. C. B. Taylor

! South Miss. Electric Power Association P. O. Box 1589 Hattiesburg, MS 39401 l

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,_ ~ m a f. , ,

Attrchment to AECM-82/53 Page_1 of 1 4

STATUS REPORT FOR PRD-81/53 I. Description of the -Deficiency The present arrangement of the Standby Dieael Generator pneumatic logic is such that the diesels may inadvertently shut down under certain conditions. The Standby Diesel Generator pneumatic. logic is to be designed such that the engines will automatically shutdown on either low lube oil pressure with a 2-out-of-3 logic or high crankcase pres-sure with a 2-out-of-3 logic. However, due to the two logic lines being tied into a common line, it is possible that the engines could be shutdown on a 2-out-of-6 logic.

The plant system affected by this deficiency is System P75 - Standby Diesel Generator System. This deficiency is applicable to both Unit 1 and Unit 2.

II. Approach to Resolution of the Problem The vendor is to evaluate the condition, determine the cause and estab-lish corrective actions.

III. Status of Proposed Resolution The vendor has been requested, by our Architect / Engineer, to determine the cause, the corretetive actions, and to evaluate the condition for reportability.

IV. Reason Why a Final Report Will be Delayed The vendor has not completed the evaluation of the condition.

V. Date When a Final Report Will be Submitted MP&L expects to submit a Final Report on or before March 24, 1982.