ML19210C895

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Responds to IE Bulletin 79-14,Revision 1,Suppls 1 & 2, Seismic Analysis for As-Built Safety-Related Piping Sys. All Necessary Checks Will Be Made Prior to Fuel Load
ML19210C895
Person / Time
Site: Grand Gulf  Entergy icon.png
Issue date: 10/31/1979
From: Dale L
MISSISSIPPI POWER & LIGHT CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-79-14, NUDOCS 7911200273
Download: ML19210C895 (3)


Text

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MISSISSIPPI POW'G3 & LIGHT COMPANY

. J Helping Build Mississippi P. O. B O X 164 0, J A C K S O N, MIS SIS SIP PI 3 9 2 0 5 3 , , ,

PRO 9UCTICN OEPARTMENT Office of Inspection and Enforcement October 31, 1979 U. S. Nuclear Regulatory Commission Region II 101 Marietta 'itreet, N. W., Suite 3100 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Director

Dear Sir:

SUBJECT:

Grand Gulf Nuclear Station File 0260/15521/16372 Evaluation of IE Bulletin 79-14 AECM-79/122 NRC IE Bulletin 79-14 " Seismic Analyses for As-Built Safety Related Piping Systems" Revision 1 (amplified by supplements 1 and 2) expresses a concern regarding the accuracy of the input information for seismic analyses.

As the Grand Gulf Nuclear Station Units 1 and 2 is currently in the construction phase, we feel it would be premature for us to verify that the seismic analysis input information conforms to the actual configuration of safety-related systems. At this time, meny supports have yet to be installed. Therefore, it will be necessary for us to retrace the same in-spection steps at a later date to ensure that final installation agrees with the seismic analysis input.

In an attempt to reduce the amount of repetitive inspection, all of the necessary checks listed in IE Bulletin 79-14 will be made prior to fuel load. At that time, a complete list of applicable design documents as well as verification of inspection will be available for NRC review. Enclosurt No. 1 provides a list of all safety-related systems which will be reviewed in accordance with IE Bulletin No. 79-14.

Yours truly, f

L. F. Dale

. Nuclear Project Manager.

RTE /JDR:dwe

Enclosure:

1. List of safety-related systems cc: Mr. N. L. Stampley )3b 011 Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stello, Jr., Director 5

. m 4S COprl;> .

Division of Inspection & Enforcement U. S. Nuclear Regulatory Commission 7g Washington, D. C. 20555 Member Middle South Utilities System

I Enclosure 1.

SAFETY RELATED SYSTEMS (Note 1)

1. Makeup Water Treatment System
2. Standby Service Water System
3. Component Cooling Water System
4. Standby Diesel Generator System
5. Plant Service Water System
6. Main Steam 6 Feedwater Systems
7. Main Steam Relief Valves - ADS System Only
8. Reactor Recirculation System
9. Reactor Water Cleanup System
10. Control Rod Drive Hydraulic System
11. Reactor Core Isolation Cooling System
12. Residual Feat Removal System
13. High Pressure Core Spray System
14. Low Pressure Core Spray System
15. Euel Pool Cooling & (Cleaning System) 1361 112

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! Enclosure 1 (continued)

  • 1
16. Filter & Demineralizer System
17. Combustible Gas Control System
18. HPCS Diesel Generator System
19. Suppression Pool Makeup System
20. Mainsteam Iso. Valve Leakage Control
21. Suppression Pool Cleanup System
22. Plant Chilled Water System
23. Feedwater Leakage Control System
24. Drywell/ Containment / Auxiliary Isolation Piping
25. Standby Liquid Control System o

Notes: 1. Only the safety related portions of the listed systems will be reviewed in accordance with IE Bulletin 79-14.

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