ML20083N006
| ML20083N006 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 01/28/1983 |
| From: | Dale L MISSISSIPPI POWER & LIGHT CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| AECM-83-58, NUDOCS 8302010528 | |
| Download: ML20083N006 (2) | |
Text
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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. O. B OX 164 0, J A CK S O N. MIS SISSIPPI 3 92 05 January 28, 1983 NUCLEAR PROoUCT1oN oEPARTMENT Nuclear Regula _.7 Commission Office of Reactor Regulation Washington, D. C. 20555 Attention: Mr. Harold R. Denton, Director Daar Mr. Denton:
SUBJECT:
Grand Gulf Nuclear Station Units 1 and 2 Docket No. 50-416 and 50-417 License No. NPF-13 File 0260/L-860.0 Evaluation of Emergency Procedures for Containment Spray Actuation
References:
- 1) AECM-82/193
- 2) AECM-82/207 AECM-83/58 Mississippi Power & Light Company (MP&L) has been requested by members of your staff to review our position of initiating containment sprays at the same time as the Hydrogen Igniter System when the reactor core water level reaches l
the top of active fuel (TAF) due to postulated multiple failure. A detailed i
review is in progress, which is addressing the follawing issues:
l l
1.
Diversion of RHR from LPCI to containment spray mode.
2.
Methods of detecting burns in the wetwell.
3.
Qualification of components for detection and display of burn information.
4.
Impact on equipment survivability due to delayed spray initiation.
5.
Reactor operator intervention time for manual initiation of sprays following alarm and verification of hydrogen burns.
At the present time, qualified equipment is not in place which will detect the first burn. However, the second series of burns can be detected by the qualified equipment already operational. Further evaluation is in progress to determine whether later initiation of the sprnys is the preferred long-term approach for plant operation.
In addition, regarding the impact on equipment survivability of delayed l
burn initiation, there is a considerable degree of conservatism in the equipment survivability calculations and it is not anticipated that there will be problems in this area.
8302010528 830128 PDR ADOCK 05000416 P
PDR Member Middle South Utilities System L
T W
AECM-83/58 MILilO".PPI POW'84 O LIGHT COMPANY E'
This effort will ultimately culminate in appropriate statements in the Emergency Operating Procedure (EOP's) for the Grand Gulf Nuclear Station (GGNS). At this time, MP&L is, as described above, actively supporting Hydrogen Control Owners Group (HCOG) efforts to finalize a proposed Emergency Procedure Guideline (EPG) in cooperation with the EPG Committee of the BWR Owners Group.
Submittal of this completed study will be before the plant begins power ascension above 5% power. Should you require interim information please contact us.
Yours truly,
/
4k
'L F. Dale
- T Manager of Nuclear Services JRH/SHH/JDR: sap cc:
Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner lir. G. B. Taylor Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washingcon, D. C.
20555 Mr. J. P. O'Reilly, Regional Administrator Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W., Suite 3100 Atlanta, Georgia 30303 i
f
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