ML20003H254

Interim Deficiency Rept 3 Re Incorrectly Ordered Throttling Valves,Initially Reported on 800912.Supplier Mod of Valves Underway.Final Rept to Be Delayed Until 811016 to Assure All Affected Sys Adhere to Design Specs

ML20003H254
Person / Time
Site:	Grand Gulf
Issue date:	04/29/1981
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-81-149, NUDOCS 8105050423
Download: ML20003H254 (3)

Text

1

- N dj.t WbD

.n e

t MISSISSIPPI POWER & LIGHT COMPANY l

• 4 'b Helping Build Mississippi EdelMdag P. O. B O X 16 4 0. J A C K S O N MIS SIS SIP PI 3 9 2 0 5 JAMES P. McGAUGHY JR.

^**'"^""5" April 29f 1981 ,

l r;e.' ' N~2. . ..;n j. \

/ *

Office of Inspection & Enforcement '. ,.

U. S. Nuclear Regulatory Commission / ' .X, N/j/, / , C \

(*fj b.

' l Regior, '.2 '< g' Q, ~

L 101 Marietta Street, N.W.

Suite 3100 i g ' ,' . A* /gy

" /.s %

Atlanta, Georgia 30303 .J *'/ 4.) ",<f

~

\v. ; ,. , ',-

Mr. J. P. O'Reilly, Director N .~.'

7 Attention:

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 j' PRD-80/58, Interim Report No. 3.

Incorrectly Ordered Throttling Valves AECM-81/149

References:

1) AECM-80/253, 10/13/80

2) AECM-81/46, 1/23/81 On September 12,'1980, Mississippi Pover & Light Company notified Mr. M.

Hunt, of your office, of a Potentially Report.able Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerned incorrectly ordered throttling valves for the Residual Heat Removal (RHR)

System, and the Low Pressure Core Spray (LPCS) System. As a result of additional investigative efforts on the part of the Constructor, the Reactor Water Cleanup (RWCU) System and the Fuel Pool Cooling and Cleanup (FPCC)

System have also been shown to be involved.

To date, the full extent of the problem is not certain. Investigative l

efforts are continuing. This report was due on 4/22/81, but on that date an extension until 4/29/81 was granted to Mr. Art Ramey of our office by Mr. F.

S. Cantrell of your office. The reason for the extension request was to confer with our Constructor during a scheduled meeting on 4/23/81. At that meeting we requested that a systematic review take place to ensure that all valves (other than the ones previously identified) specified by design as throttling valves had been ordered correctly. Our Constructor has indicated that the additional review will take some time to complete. Management, Corrective Action Request (MCAR) 99 is the document issued by the Consu;ructor to track this deficiency. g

5. .

m  : --

@@ ' .z.;&'.5 l

g3 g50o vn QQ t

somb.c middi. South utiiiei.s Syse.m 7.;; .

f l

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

a Mr. J. P. O'Reilly AECM-81/149 NRC Page 2 l

i l

l i

It is anticipated Gnat the full extent of the problem can be identified and corrective actions taken by October 16, 1981 at which time a Final Report can be rendered. Attached is our interim report.

Yours truly,

, J. P. McGaughy, Jr.

FGM/KDS:mt Attachment cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner;

Mr. Victor Stello, Director Office 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 O

O O

0 4

~

>g * , b ,

r.

l e

U l

i Attachment to AECM-81/149 i Page 1 of 1 l INTERIM REPORT NO. 3 FOR PRD-80/58 l

I. Description of the Deficiency l 1

l Valves for the Low Pressure Core Spray (LPCS) System (E21), the Residual I Heat Removal (RER) System (E12), the Reactor Water Cleanup (RWCU) System l (G33) and the Fuel Pool Cleanup (FPCC) System (G41) were incorrectly purchased as shut-off valves. However, these valves are required to '

operate as throttling valves in order to perform their normal operational safety functions.

This deficiency applies to both Unit 1 and Unit 2.

Reportability per 10CFR50.55(e) was provided on October 13, 1980 by AECM-80/253.

II. Approach to Resolution of the Problem The deficiency is due to incorrec,tly ordered oc'.or operated throttling valves ordered per specification '9645-M-242.0 as shutoff valves. It is believed that all valves affected have been identified; however, the investigation is continuing to confirm this position.: The Constructor has effected coordination with the supplier to evaluate the performance characteristics of each valve in question. In some cases, modification is currently in progress.

Concurrently, the Constructor has issued revisions to the purchase specification to identify those valves requiring a throttling capability to perform the operational function. These revisions will have the effect of precluding recarrence of the problem in regard to Unit 2 construction.

III. Status of Proposed Resolution Modification of the valves by the supplier is underway although no anticipated date of completion of these actions is available at this time.

IV. Reason Why A Final Report Will Be Delayed Verification from the Constructor is being sought to obtain assurance that all affected systems are scrutinized for adherence to design specification. In addition, the problem or "cause" is being addressed to the Constructor to report circumstances that created this deficiency and to establish procedures to preclude such a recurrence.

~

V. Date Final Report Will Be Subamitted It is ane.cipated that a Final Report can be provided by October 16, *

. 1981. ,

8 -

.w  ; ,N-WP p . .. **,

g l' .

,w. - - - - - - - -n---- ~ , - , ,-