ML20168A728

Final ASP Analysis - Salem 1 (LER 272-77-034)

ML20168A728
Person / Time
Site:	Salem
Issue date:	06/16/2020
From:	Christopher Hunter NRC/RES/DRA/PRB
To:
Littlejohn J (301) 415-0428
References
LER 1977-034-00
Download: ML20168A728 (4)

Text

20, 1977 oth SI Pumps and One Charging Pump Out of Service During Heatup at alem 1 re sequence was:

g plant heatup, both SI pumps plus one centrifugal charging pump were leared from cold shutdown overpressure control.

e action; verpressure control restrictions were cleared upon discovery.

rpose of failed system or component:

afety Injection pumps and the centrifugal charging pumps provide high safety injection during a small LOCA.

3 ility of system per WASH 140T:* High Pressure Injection: 8.6 x 10 -/D ility of component per WASH 1400:* operator error, failure to follow a step within a procedure: 3 x 10-3iD 1

vailabilitie are in units of per demand D- . Failure rates are in per hour HR-T

ctor heatup, Two of two safety One of two centri- Potential h reactor in injection pumips fugal charging Severe shutdown inoperable due to pumps inoperable Core failure to clear due to failure-to Damage cold shutdown over- clear cold shutdown pressure control overpressure control restrictions restrictions No -no LOCA plus in hot shutdown No -no LOCA plus in hot shutdown No NSIC 125106 - Actual Occurrence for Both SI Pumps and One Charging Pump Out of Service During Heatup Salem 1

Heat Removal tross-Connect Damage 1

2 3

4 5

6 7

NSIC 125106 - Sequence of Interest for Both SI Pumps and One Charging Pump Out of Service During Heatup at-Salem 1.

N NUMBER: 125106 May 20, 1977

May 6, 1977 ED: Safety Injection, Charging OLVED: SI pumps, charging pump re to clear cold-shutdown overpressure control restrictions, human error.

NTEREST: Small LOCA ENCE: failure to clear overpressure restrictions during heatup Salem 1

50-272 PWR ICAL RATING: 1090 MWe 0.8 yr inghouse INEERS: Utility Public Service Electric & Gas Co.

0 miles south of Wilmington, DE 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> NG CONDITION: hot shutdown RE TYPE OF FAILURE: (a) inadequate performance;(Cb) failed to start; (9made inooerable; (d) -

HOD: plant equipment status review