ML20031G473
| ML20031G473 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 10/16/1981 |
| From: | Mcgaughy J, Reaves T MISSISSIPPI POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-80 10CFR-050.55E, 10CFR-50.55E, AECM-81-404, NUDOCS 8110220462 | |
| Download: ML20031G473 (5) | |
Text
-
i MISSISSIPPI POWER & LIGHT COMPANY
_El Helping Build Mississippi P O B O X 16 4 0. J A C K S O N. MISSISSIPPI 39205 l-TssIs$$rT$Ns@jr October 16, 1981
< s \\q' \\ E! f <Q Office of Inspection & Enfarcement
/N Fr j/'[
'T U. S. Nuclear Regulatory Commission f
((
[ y {,
b f Region 11 101 R1rietta Street, N.W.
OOIS'9 h
Suite 3100 1 84 IA t---
NrD'% Q Atlanta, Georgia 30303 Attention:
Mr. J. P. O'Reilly, Director
/'
Dear Mr. O'Reilly:
SUBJ ECT: Grand Gulf Nucicar Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/73, Final Report, Instrument Process Tubing AECM-81/404 References 1) AECM-81/283, 8/12/81
- 2) AECM-81/144, 4/14/81
- 3) AECM-81/49, 1/29/81 On December 30, 1980, Mississippi Power & Light Company notified Mr. J.
Bausch, of your of fice, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site.
The deficiency concerns discrepant slopes in instrument proceas tubing.
Our evaluations have shown that this deficiency, had it remained uncor-rected, would be a substantial safety hazard and is reportable under the provisions of 10CFR50.55(e) and 10CFR21. Details are included in our attached final report.
I Yours truly, J. P. McGaughy, Jr.
KDS:dr ATTACHMENT cc:
See page 2
/
S]'
lbi!!aerossig;s, b
P R Member Middle South Utilities System
Mr. J. P. O ' Re illy AECM-81/404 NRC Page 2 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 Associatisn P. O. Box 1589 Hattiesburg, MS 39401
9 Attachment to AECM-81/404 Page 1 of 3 FINAL REPORT FOR PRD-80/73 Reportable Under 10CFR50.55(e) and 10CFR Part 21 1.
Name and address of the individual... informing the commission:
T. E. Reaves, Jr.
Manager of Qualify Assurance P.O. Box 1640 Jackson, Mississippi 39205 Notit cation of Part 21 applicability made to Mr. J. P. O'Reilly, NRC, Region II by letter ACCM-81/404, October 14, 1981.
2.
Identification of the facility...which...contains a defect:
Grand Gulf Nuclear Station (GGNS) Units 1 and 2 Port Gibson, Mississippi 39150 3.
Identification of the firm... supplying the basic component which
...contains a defect:
Supplied to Grand Gulf by Bechtel Power Corporation, Gaithersburg, Maryland.
4.
Nature of the defcet...and the safety hazard which...could be created by such defect...:
A.
Description of the Deficiency A random sample of instrument process tubing disclosed a number of instal-lations that did not meet the minimum slope requireme'at of Specification 9645-J-702.0, Rev. 16.
Several of the discrepant installations had been accepted by Field Engineering and Quality Control, rendering the quality of all installed safety related cubing indeterminate.
This condition affects the following systems: Nuclear Boiler (B21), Reactor Recirculation (B33), Control Rod Drive Hydraulic (C11), Feed Water Control (C34), Remote Shutdown (C61), Reactor Protection (C71), Heat Removal (E12),
Low Pressure Core Spray (E21), High Pressure Core Spray (E22), Suppression re:
Pool Makeup (E30), Leak Detection (E31), Feed Water (E38), Reactor Core Isolation Cooling (E51), Reactor Water Cleanup (G33), Fuel Fool Cooling and Cleanup (G41), Main and Reheat Steam System (Nil), Standby Service Water (P41), and Standby Gas Treatment (T48).
It applies to both Unit 1 and Unit 2.
B.
Analysis of Safety Implications The potential exists for the deficiency, as noted, to produce an error in essential instumentation in excess of design limits. Potentially, inac-curate instrument readings / trips could adversely affect the safe operation of the plant and be a substantial safety hazard.
er Attachment to AECM-81/404 Page 2 of 3 5.
The date on which the information of such defect
....was obtained.
Mississippi Power and Light received information of the defect on December 30, 1980. We reported the deficiency to Mr. John Rausch of your office as a Potentially Reportable Deficiency on that date. Since that date MP&L has filed three (3) interim reports to inform the Commission of the progress and status of the resolution of this deficiency. An evaluation for Part 21 has been completed and the MP&L " Responsible Of ficer," Mr. J. P. McGaughy, Jr., will be notified upon his return to the of fice.
6.
In the case of the basic component...the number and location of all such components.
The defective equipment accepted by Mississippi Power & Light is in the Low Pressure Core Spray System (E21). Although the deficient condition affects numerous other safety related systems, E21 is the only system that had been accepted by MP&L.
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 Specifications J-701.0 (Non Safety-Related) and J-702.0 (Safety-Related) were both revised by our Architect / Engineer to clarify slope require-ments. Our Constructor's Instrumentation Field Engineering and Quality Control personnel were given training in the interpretation of the new slope requirements and requirements for the lastallation and acceptance of tubing.
Changes were made by our Constructor's Quality Control to QCI-0721T to 2
accept deviations from the isometric drawing as allowed per Specification J-702.0 and all Quality Control personnel have been indoctrienced to changes in QCI-0721T.
All previously accepted safety-related tubing installations were rein-spected. Those that did not comply to the revised specification of J-702.0 were reviewed by our Constructor. They were either approved to use as is or were reworked.
Training and indoctrination of personnel, revisions to Specificacions J-701.0 and J-702.0, and changes to QCI-0721T will serve to preclude recur-rence of the problem.
6 Attachment to AECM-81/404 Page 3 of 3
}
I l
B.
Responsible Individual G. B. Rogers, Jr.
i Site Manager Mississippi Power and Light Company.
C.
Lens' of Time to CompleL Actions The problem was identified on December 30, 1980.
Bechtel issued Management Corrective Action Report (MCAR) 119 on May 4,1981. All corrective actions in the non-NSSS scope of supply have been com-pleted. In the NSSS scope of supply, the tubing installations have been redesigned. Rework will be completed prior to fuel load.
8.
Any advics to the defect...that has been, is being, or will be given to purchasers or licensees:
As the deficiency did not originate with MP&L, we have no advice to offer.
3 1
1 4
l f
-i.y,,
--c,-e,..
,,,y..,,~-3
,....-y,
,,wc-,-w_m-.7-.
3c-.__.-.w.,,--e-
..,y-,.,-rw,%,r--,.v.,.
,rr--
4,-,--
-