AECM-83-0445, Interim Deficiency Rept Re Asco Spare Part Kits for Scram Pilot Valve Solenoids.Initially Reported on 830804.Kits to Be Inspected & Air Supply to Be Flushed.Also Reportable Per Part 21.Next Rept by 830909

Interim Deficiency Rept Re Asco Spare Part Kits for Scram Pilot Valve Solenoids.Initially Reported on 830804.Kits to Be Inspected & Air Supply to Be Flushed.Also Reportable Per Part 21.Next Rept by 830909

ML20076A771
Person / Time
Site:	Grand Gulf
Issue date:	08/05/1983
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, AECM-83-0445, AECM-83-445, NUDOCS 8308180326
Download: ML20076A771 (5)

Text

_ _ _ _ _ _ _ _ _ _

O MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. O. B O X 16 4 0. J A C K S O N. MISSISSIPPI 39205 NUCLE AR PRODUCTON DEPARTMENT August 5,1983 Of fice of Inspection & Enforcement c0

~Y.

'Q 's U. S. Nuclear Regulatory Commission N Region 11 6 101 Marietta Street, N.W. "

Suite 2900 # "..

Atlanta, Georgia 30303 .p y '.,

<:9

• • ^

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

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 l License No. NPF-13 l File 0260/15525/15526/16694.4 l PRD-83/10, Interim Report, ASCO Spare Parts Kits for Scram Pilot Valve Solenoids

! AECM-83/0445

)

! On August 4,1983, Mississippi Power & Light Company notified Mr. Paul Fredrickson, of your of fice, of a Reportable Deficiency at the Grand Gulf Nucinar Station (GGNS) which MP&L has evaluated and determined to be reportable under the provisions of 10CFR21 for Unit 1. The deficiency concerns the receipt of improperly assembled ASCO spare parts kits for the scram pilot valve solenoids. It is indeterminate at this time as to whether i l this deficiency is applicable to Unit 2. l Details are in our attached Interim Report. We expect to submit our next l i

report by September 9,1983.

1 Yours tru ,

s

%:Jn ,

El g h.P.McGaughqJr.

'I J y, RDC:dr ATTACHMENT cc: See page 2 8308180326 830805 DR ADOCK 05000416 PDR

~ OFFICIAL COW Member Middle South Utilities System _

7

Q Mr. J. P. _0'Reilly ABCM-83/0445 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 Misa. Electric Power Association j P. O. Box 1589

, Hattiesburg, MS 39401 a

f

- . > - - - ~ ~ -- --

o Attachment to AECM-83/0445 Page 1 of 2 INTERIM REPORT NO. 1 FOR PRD-83/10

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

J. P. McGaughy, Jr.

Vice-President, Nuclear .

P.O. Box 1640 Jackson, Mississippi 39205 Notification of Part 21 applicability made to Mr. J. P. O'Reilly, NRC, Region II by letter AECM-83/0445, August 5, 1983.

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

Grand Gulf Nuclear Station (GGNS) Unit 1 Port Gibson, Mississippi 39150

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

contains a deficiency:

Supplied to Grand Gulf by General Electric Co. (G. E.) and manufactured by Automatic Switch Company (ASCO).

4. Nature of the deficiency .. . and the safety hazard which ... could be created by such a deficiency ...:

A. Description of the Deficiency Several hydraulic control unit scram pilot valves were determined to be buzzing, chattering and/or leaking air through the solenoid valves' vent. Examination of spare parts kits manufactured by ,

l ASCO and supplied by G. E. has revealed ASCO preassembled items which'were not assembled according to ASCO assembly procedures.

The items in question are the solenoid base subassembly, core spring, and core assembly for the "A" solenoid side of the valve. The core springs are installed in reverse direction into the core contrary to ASCO procedures.' Approximately 30% of the new preassembled spare parts kits, to date, from ASCO have been found with the core springs reversed. Discussions with ASCO and  ;

G. E. indicate that reversed ' core springs will cause " chattering" and eventual failure of the valve.

B. Analysis of Safety Implications ' .l Failure of the solenoid valve due to damaged internals challenges the ability to scram a control rod, thus presenting a situation which could represent a substantial safety hazard. No failures to

~

+ acram control rods due to faulty scram pilot valve solenoids have I been reported at GGNS as of this date.

i' 4

9

. . . - . __m._ . ,~-.,_m-,

• m , ,

, e

, Attachment to AECM-83/0445 Page 2 of 2

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

Mississippi Power and Light discovered the defect on July 27, 1983. We then evaluated the deficiency and determined the deficiency could represent a substantial safety hazard. The deficiency was then reported to Mr. Paul Fredrickson, of your of fice, on August 4,1983. The MP&L

" Responsible Of ficer," Mr. J. P. McGaughy, Jr. , has been notified. ,

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

We do not have knowledge of the location of defective equipment located other than at GGNS.

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) All spare parts kits will be inspected prior to use to ensure the preassembled items are properly assembled.

2) . All 193 Hydraulic Control Unit (HCU) scram pilot valves have been refurbished.

3) A chemical flush of adjacent air supply is in process.

l 4) Testing of all affected components will be completed prior to the closure of nonconformance tracking documents.

B. Responsible Individual C. K. McCoy.

Plant Manager Mississippi Power & Light Co.

I Responsible for Unit 1 C. Imnath of Time to Complete Actions Inspection of- spare parts kits prior to use will be an ongoing evolution as spare parts kits are received.

We expect to provide additional information by September 9,1983.

8. Any advice related to the _ deficiency .... that has been, is being, or will be given to purchasers or licensees:

l I MP&L has no advice to offer relative to this matter to other purchasers

! or licensees.

l

, .=

bec: Mr.' D. C. Lutken Mr. J. P. McGaughy, Jr.

Mr . T. E. Re ave s, Jr .

Middle South Services Nuclear Activities Mr. J. F.- Hudson Mr. C. D. Wood Mr. Adrian Zaccaria Mr. A. R. Smith Mr. R. S. Trickovic Mr. M. D. Archdeacon Mr. J. W. Yelverton Mr. L. F. Dale Mr. C. K. McCoy Mr. T. M. Cloninger Mr. L. F. Daughtery Mr. J. F. Pinto Mr. S. H. Hobbs Mr. C. C. Hayes Mr. A. G. Wagner Mr. A. S. McCurdy

Mr. W. E. Edge Mr.-J. E. Reaves File (LCTS) (2)

, PRD File Manual File File (Plant)

File (Project) [6]

Mr. M. D. Hous ton i U. S. Nbelear Regulato ry Commission Division of Licensing Wa shington, D. C. 20555 2

l 1

i 1

. . . _ _ _ , , . . - _.--. -