ML20151N583

Proposed Tech Specs,Changing Condition Requiring Resolution of Hydrogen Control Issue Prior to Restrat Following First Refueling Outage by Requiring Resolution Schedule to Reflect Final Hydrogen Control Rule

ML20151N583
Person / Time
Site:	Grand Gulf
Issue date:	12/27/1985
From:	MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML20151N580	List: AECM-85-0367, Application for Amend to License NPF-29,changing Condition Requiring Resolution of Hydrogen Control Issue Prior to Restart Following First Refueling Outage by Requiring Resolution Schedule to Reflect Final Hydrogen Control Rule ML20151N583
References
TAC-60372, NUDOCS 8601030014
Download: ML20151N583 (2)

Text

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! - 2) Research to investigate the conditions leading to and ccnsequences resulting from hydrogen combustion in the wetwell and con-

. tainment. Testing shall be perfomed in a larger scale facility such as the one-quarter scale test facility proposed by MP&L;

3) Research to investigate the conditions leading to and consequences resulting from hydrogen combustion in the drywell; -

4) Confirmatory tests on thennel response of selected equipment exposed to hydrogen burns.

l (b) MP&L shall perform feasibility studies to i examine the options for enhancing equipment survivability for essential equipment located in the vicinity of the suppression pool or other regions subjected to severe environments.

The options to be studied in such feasibility studies shall in:1ude thermal shielding, addi-gg g 7779 m p tional cooling, and relocation of essential Pc0L 97/'V "**"**

(2) o startup following the first refuelin ,

MP&L mus RC approval that e hydrogen control sys p ant is installed and will ntende in a manner v des adequate safety margins.

(e) Instrumentation for Detection of Inadequate Core Cooling (II.F.2, 5ER, SSER #2) l MP&L shall submit a report addressing the analysis perfonned by the BWR Owners' Group regarding additional instrumentation relative to inadequate core cooling and shall implement the staff's requirements after the completion of the staff's review of this report. These modifications shall be completed on a schedule acceptable to the staff. ,

(f) Modification of Automatic Depressurization System Logic -

Feasibility for Increased Diversity for Some Event Sequences (II.K.3.18, SEfi3STR #2, SSER 44)

Prior to startup following the first refueling outage, MP&L shall provide, for NRC review, justification for the timer delay settings, revisions to the emergency procedures

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B601030014 851227 PDR ADOCK 050 4y6 P

n J Amended- License Condition 2.C. (33.d.2) PCOL-85/24

-2a. MP&L shall. complete.its;research program on hydrogen control to show that

.the hydrogen' control system will perform its intended function in a manner that provides' adequate safety margins. This_research program shall be completed on a schedule which reflects the requirements of.the recently published Final-3

-Hydrogen Control Rule.-

-b. If'it is determined that plant modd.fications are required to obtain NRC approval that an adequate hydrogen cont.:ol system for Grand Gulf is installed,

.then these modificationsishall'be complo:ed on a schedule which is approved by the NRC.

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