AECM-83-0759, Final Part 21 Rept PRD-83/16 for Unit 1 & Interim Part 21 Rept for Unit 2 Re Failure of Internal Coating of Automatic Depressurization Sys,Main Steam Safety Relief Valve & MSIV Accumulators.Final Rept Expected by 840531

Final Part 21 Rept PRD-83/16 for Unit 1 & Interim Part 21 Rept for Unit 2 Re Failure of Internal Coating of Automatic Depressurization Sys,Main Steam Safety Relief Valve & MSIV Accumulators.Final Rept Expected by 840531

ML20082F121
Person / Time
Site:	Grand Gulf
Issue date:	11/18/1983
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-83-056-000 AECM-83-0759, AECM-83-759, PT21-83-056-000, PT21-83-56, TAC-49992, NUDOCS 8311280438
Download: ML20082F121 (5)

Text

. .

E MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. .

g ig O,.g C K S O N. MI S SIS S IP PI 3 9 2 0 5 November 18, 1983 JAMES P. McGAUGtf Y. JR.

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

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

SUBJECT:

Grani Gulf Nuclear Station Units 1 and 2 License Ne. NPF-13 Docket Nos. 50-416/417 File 0260/15525/15526/16694.4 PRD-83/16, Final Report Unit 1, Interim Report #1 Unit 2, ADS, MSRV, MSIV Accumulator s AECM-83/0759 On November 15, 1983, Mississippi Power & Light Company notified Ms. L.

Watson, of your of fice, of a Reportable Deficiency at the Graal Gulf Nuclear Station (GGNS). The deficiency cor.cerns failure of the internal coating of the ADS, MSRV, MSIV accumulators. This deficiency af fects thirty-six (36)

Unit 1 accumulators. The condition has been determined to be reportable under the guidelines of 10CFR21 for Unit 1.

Investigation into the applicability of this condition to Unit 2 is c ont inuing . We expect to submit a Final Report by May 31, 1984.

Yours truly J. P. McGaughy, Jr.

KDS:dr ATTACHMENT cc: See page 2 8311280438 831118 PDR ADOCK 05000416 S PDR ;j q g

Member Middle South Utilities System j(

r. .,

- Mr . 'J . P . O ' Re il ly AECM-83 /0759

' NRC Page 2 cc: Mr. J. B. Richard Mr. R. B. McGehee Mr. T.'B. Conner Mr. Richard C. DeYoung, Director Of fice 'of Inspect ion &' Enforcement U.~ S. Nuclear Reguletory Comunission Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association

- P. O.' Box 1589 Hattiesburg, MS 39401-

)

f

, m --- ,,, g -

,- e--.,

Attachment to AECM-83/0759

. Pcgt I cf 3 FINAL REPORT FOR UNIT 1, ON PRD-83/16 INTERIM REPORT fl FOR UNIT 2

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

J. P. McGaughy, Jr .

. .Vice-Pres ident , Nuc lea r P.O. Box 1640 Jackson, Mississippi 39205

2. Identification of the facility . . . which . . . contains a de ficiency:

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

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

contains a deficiency:

The Main Steam Isolation Valve (MSIV) and Main Steam Safety Relief Valve (MSRV) accumulators were manufactured by the Buf falo Tank Division of Bethlehem Steel Corporation and supplied to Grand Gulf by the Bechtel Power Corporation, Gaithersburg, Maryland.

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

A. Description of the Deficiency The deficiency concerns' the failure of the internal coating applied to the MSIV and MSRV valve accumulators. The coating application on the accumulators was not ad eq ua t e.

The results of " air blows" conducted as a result of an earlier defic-iency of the instrument air system prompted an internal inspect ion of the coated carbon steel accumulators and ADS receivers. This inspec-tion revealed failures in the internal coating of the accumulators.

However, the internal coating on the four (4) ADS receivers was s atis facto ry. The failure of the coating was exhibited by blister-ing, peeling and uncoated areas Which resulted in rust fo rmat ion inside the vessels. It has been detennined that the cause of failure was due to improper surface preparation and/or application of the coating.

B. Analysis of Safety Implications The existence of uncoated carbon steel vessels could result in corrosion products being introduced 'into the air supply to the MSIV's, ADS and Safety / Relief valves which could impair the

r~- ~ r' ,

3,

^

.. 1 Attachment tio AECM-33/0759

!! Pega 3 of 3

'C.  : Length of Time to Complete Actions The corrective actions for .the thirty-six (36) Unit I accumulators have been completed.

Corrective Actions for Unit 2 will be completed prior to Unit 2 fuel .

load.

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

As the deficiency = did not originate with MP&L, we hava no advice to of fer.

N

[

r

- ,. . ._ # . . _ , , . , _, . . , _ _ _ ...,..$.m,....... , . , . _ , . . . _ , . . . _ _ _ , . . . . , . , , , . _ , _ , . . . . _ . . . . . . . . . - _ _ , ~ . , _ . . , , , _ , . _ _ .

.  ?* Attachment to AECM-83/0759 R _Pcgs 2 of 3 performance of these valves. The corrosion products could prevent -

the MSIV solenoid valves 1f rom changing position, when required, during a steam. line break. This _ vould prevent closure of the MSIV's which could lead to exceeding the' limits of 10CFR100. -

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

Mississippi Power and Light received information of the deficiency on July 2, ~1983. We reported the deficiency to Ms. L. Watson, of your office, as a Reportable Deficiency for Unit 1 on November 15,'1983. An evaluation for Part 21 has been completed -for. Unit 1 and the MP&L "Res ponsible

Of ficer," Mr. - J. P. McGaughy, Jr. , will be notified when he returns to his office.

-6. In -the case of the basic component . .. the. nudber and location of all such c omponent s.

The thirty-six (36) accumulators are located at the Grand' Gulf Nuclear

. Station, Unit 1.-

It is not known at this time .if this deficiency af fects Unit 2.

We do not have knowledge of the location of defective equipment located other than at Grand Gulf Nuclear Station.

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

. . . responsible for the act ion; and the length of time ' that has been . . .

taken to complete the action.

A. Corrective Actions Tanen All thirty-six (36) Unit 'l coated carbon ~ steel accumulators supplying

~

the MSIV's, ADS and l Safe ty/ Relief valves have been repaired. The

~

vessel internals were vacublasted and recoated with Ameron Amercoat

90. E1cometer adhesion tests were conducted on, sample discs coated with Ameron Amercoat 90 with resultant values larger than those required by , ANSI N5.12-1974, " Protective Coating's (paints) for the Nuclear Industry".

Applicability and action required for Unit 2 is being deteneined at this time.

B. Responsible Individual Unit 1 Unit 2 C. K.-McCoy T. H. Cloninger Plant Manager Unit 2 Project Manager Mississippi Power & Light Co. Mississippi Power & Light Co.

. _ _