AECM-84-0212, Final Part 21 & Deficiency Rept for Unit 1 & Interim Rept 1 for Unit 2 Re Failure of Deluge Valves Mfg by Automatic Sprinkler Corp of America.Initially Reported on 840319

Final Part 21 & Deficiency Rept for Unit 1 & Interim Rept 1 for Unit 2 Re Failure of Deluge Valves Mfg by Automatic Sprinkler Corp of America.Initially Reported on 840319

ML20083K266
Person / Time
Site:	Grand Gulf
Issue date:	04/06/1984
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-84-355-000 AECM-84-0212, AECM-84-212, PT21-84-355, PT21-84-355-000, NUDOCS 8404160117
Download: ML20083K266 (5)

Text

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MISSISSIPPI POWER & LIGHT COMPANY

] Helping Build Mississippi M P. O. B O X 16 4 0, J AC K S O N, MIS SIS SIP PI 3 9 2 05 11 .-da . O B J AMES P. McGAUGHY. JR.

April 6, 1984 m e m ..n =

U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W.

Suite 2900 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket No. 50-416/417 License No. NPF-13 File 0260/15525/15526/16694.4 PRD-84/04, Final Report for Unit 1, Interim Report No. 1 for Unit 2, Failure of ASC0A Deluge Valves AECM-84/0212 On March 19, 1984, Mississippi Power & Light Company notified Mr. P.

Fredrickson, of your office, of a Reportable Deficiency at the Grand Gulf Nuclear Station (GGNS). The deficiency concerns the failure of two Automatic Spfinkler Corporation of America (ASC0A) deluge valves to open upon receipt of an actuation signal.

Although the fire protection system deluge valves were procured and installed as non-safety related equipment, the fire protection system for the diesel generator building is included in the MP&L Operational Quality Assurance Program. Due to the possible effect on safety related equipment in the diesel generator rooms, MP&L has concluded that the failure of the diesel generator room deluge valves is reportable under the provisions of 10CFR21 for Unit 1.

Determination of reportability for this deficiency for Unit 2 is still under way at this time. We expect to submit a Final Report on Unit 2 by May 31, 1984.

This report was originally due on March 23, 1984, but a two week extension until April 6, 1984, was granted on that day by Mr. R. Carroll.

Yours truly, 8404160117 840406 PDR ADOCK 05000416 S PDR ffy J. P. McCaughy, e. (jppj(31, dd1T CHMENT cc: See page 2 Member Middle South Utilities System I I

Mr. J. P. O' Reilly AECM-84/0212 NRC Page 2 cc: Mr.-J. B. Richard Mr. R.-B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589

-Hattiesburg, MS 39401 e

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}7 f-INTERIM REPORT NO. 1 FOR PRD-84/04

1. Name and address of the individual ... informing the coussission:

_J. P. McGaughy, Jr.

Vice-President, Nuclear P.O. Box 1640 -1 Jackson, Mississippi 39205 '!

' 2. . Identification of the facility .. . which .. . contains a deficiency: I

, Grand Gulf Nuclear Station (GCNS) Unit 1

• Port Gibson, Mississippi .39150

,_ Determination of reportability for Unit 2 is continuing at this time.

3. Identification of the firm .... supplying the basic component which .. .

contains a deficiency:

The 6 inch Model. C deluge valves were manufactured by Automatic' Sprinkler Corporation of heerica ( ASCOA) of Cleveland, Ohio, and supplied to Grand Gulf by Bechtel Power Corporation, Gaithersburg, Maryland.

l' -4. Nature of' the deficiency . .. and the safety hasard which . .. could be created by such a deficiency .. . :

A. Description of the Deficiency ie' The deficiency. involves a condition on the Unit 1, Division I and II diesel generator rooms automatic pre-action sprinkler systems. The.

normally pressurised 6 inch Model C deluge valves failed to operate upon receipt of an actuation signal. Investigation of the failures and testing was performed by Middle South Services (MSS) and ASCOA-to determine the cause of the failures. To simulate the GGNS firewater system operating pressure, the testing by ASCOA and MSS was performed ,

with 'approximately 140 psig on the' deluge valves. From the test ,

results,' the failures were attributed to the rough surface' finish of the mating surfaces between the clapper nose and _ latch.

B. Analysis ~ of Safety Implications GGNS Unit I has eleven 'normally pressurised 6' inch Model' C ASCOA deluge valves. 'Eight-of the eleven'are used for deluge systems on the main and balance of plant (BOP) transformers. The'other three valves are used in

the automatic pre-action sprinkler systems in the diesel generator-rooms.- ~ 1f 'a' fire occurred in the area of the fuel oil. day tank, the

' failure of the deluge ' valve to open could result in the.-fire spreading to the ' diesel generator _and ' prevent the diesel generator from performing its design function in the event of 'a loss of offsite Jpowe'r..

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5. The date on which the information of such deficiency . . . was obtained.

Mississippi Power and Light received information of the deficiency on September 4,1983. This deficiency was reported to the NRC by MP&L as a liscensee event in LER 50-416/83-126 on September 16, 1983. An evaluation for reportability under 10CFR21 for Unit I was completed and the deficiency reported to Mr. P. Fredrickson, of your of fice, as a reportable deficiency on March 19, 1984. The MP&L " Responsible Of ficer" Mr. J. P. McGaughy, Jr. will be notified when he returns to his of fice.

6. In the case of the basic compbnent . .. the number and location of all such components.

There are eleven (11) normally pressurized 6 inch ASCOA Model C deluge valves on Unit 1 at Grand Gulf. We do not have knowledge of the location of other defective equipment.

.7. The corrective action which has been taken ... the name of the individual ...

responsible for the action; and the length of time that has been ... taken to complete the action.

A. Corrective Actions Taken

1. The clapper and latch mating surface were smoothed with sandpaper and crocus cloth. . This action, which was recommended by the manufacturer, has been completed for the eleven 6 inch Model C deluge valves on Unit 1.

2. - The ASC0A technical information bulletins were revised by ASC0A to address the condition of the mating surfaces and to ensure that functional tests are performed with pressure on the clapper.

3.- The reportability of this deficiency for Unit 2 has not been determined at this time. However,. our Architect / Engineer has issued QAR F-451 to track the concern.

'B. . ' Responsible Individual

- Unit 1:

J. E. Cross Plant Manager Mississippi Power . & -Light. Co.-

'C. . Length of ' Time to Complete Actio'ns

- 1. I A11. corrective actions for the eleven (11) Unit 1, 6 inch Model C) deluge .' valves - are complete..

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' 8. - Any advice related to the -deficiency ... that has been, is being, or will be j given to purchasers or 1.icensees:

l As the deficiency did not originate with MP&L, we have no advice to offer.

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