ML20046C630
| ML20046C630 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 08/04/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9308110252 | |
| Download: ML20046C630 (2) | |
Text
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GENuclear Energy GewM Ekctnc Comery 175 Carmer Acue. % Jc:e. CA 95125 August 4,1993 Docket No. STN 52-001 Chet Posiusny, Senior Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABWR Schedule - ABWR CDF Sensitivity to ESF Equipment Out of Service
Reference:
Letter, same subject, Jack Fox to Chet Poslusny dated July 27,1993
Dear Chet:
The reference letter transmitted resultt of sensitivity analyses performed to determine impact on AWR CDF resulting from removal of ESF equipment from service. Calculations were performed with the ABWR internal event PRA model, and values presented represent changes from the base case CDF value of 1.56E-07 per year. The CDF change for each case reficcts the impact of completely removing the identified equipment from service. Change in CDF for any specific out of service time can be obtained by prorating between the base case CDF and that presented for the equipment completely removed from service.
Following transmittal of this information, an error was discovered in the changes in modeling made to assess impact on CDF of diesel generators and diesel combinations out of sersice.
Consequently, the cases involving diesel generators out of service were respecified and rerun.
Results of these corrected diesel generator out of service calculations are presented in the attached table and supersede those transmitted in the reference letter.
Please provide a copy of this transmittal to Millard Whol.
Sincerely, B -1 0
% 3#7 Jack Fox Advanced Reactor Programs cc: Alan Beard (GE)
Norman Fletcher (DOE)
Bob Raftery (GE)
Cal Tang (GE) 7 h
f 300031 I
9308110252 930B04 f
PDR ADOCK 05200001 d,M A
t Updated Tech Spec Sensitivity Runs D w.
Subsystem OOS ole
.A.
C'c Chance
-internal Es ents Base Case 1.56E-07 Ernergency Dievi Generatort u 005 (CTG AnulaNei EDG C 5.25E-07 3.69E-07 236.54 %
EDG D 5.27E-07 3.71E-07 237.82 %
EDG E 5.27E-07 3.71E-07 237.82 %
1829.49 %
EDG C & EDG E 3.01E-06 2.85E-%
1829.49 %
EDG D & EDG E 3.04E-06 2.88E-06 1848.72 %
Alternate Of f. site power hne & Ernergency Diesel Generator OOS Alternate Off-site power line &
6.06E-07 4.50E-07 288.46 %
EDG C OOS Alternate Off-site power line &
6.13E-07 4.57E-07 292.95 %
EDG D OOS Alternate Off-site power line &
6.1lE-07 4.55E-07 291.67%
I 8/4/93
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