05000311/LER-1982-126, Forwards LER 82-126/03L-0.Detailed Event Analysis Encl

From kanterella
Jump to navigation Jump to search
Forwards LER 82-126/03L-0.Detailed Event Analysis Encl
ML20028B367
Person / Time
Site: Salem PSEG icon.png
Issue date: 11/03/1982
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028B368 List:
References
NUDOCS 8211300325
Download: ML20028B367 (3)
v • d • e


LER-1982-126, Forwards LER 82-126/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3111982126R00 - NRC Website
v • d • e

text

e

.O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station November 3, 1982 Mr.

R.

C.

Haynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-126/03L Pursuant to the requirements of Salem Generating Station Unit No.

2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-126/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours, f

he

"'Y H. J. Midura General Manager -

Salem Operations RF:ksfd CC:

Distribution l

l

'8211300325'851103

~

PDR ADOCK 05000311 4

C PDR

/

The Energy People 95 2189 (207.'1 11 81

1 Report Number:

82-126/03L Report Date:

11-03-82 Occurrence Date:

10-19-82 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancccks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

No. 21 Charging Pump - Inoperable.

This report was initiated by Incident Report 82-373.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 82% - Unit Load 910 MWe.

DESCRIPTION OF OCCURRENCE:

At 2220 hours0.0257 days <br />0.617 hours <br />0.00367 weeks <br />8.4471e-4 months <br />, October 19, 1982, during routine operation, analysis of a sample of No. 21 Charging Pump lube oil revealed that a water-oil mixture existed.

No. 21 Charging Pump was declared inoperable, and Technical Specification Action State-ment 3.5.2.a was entered.

No. 22 Charging Pump was operable, providing emergency core cooling capabilities.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Service water had mixed with the oil through a leak in the lube oil cooler.

The cooler had prematurely failed as the result of excessive erosion and corrosion.

The copper-nickel cooler tubes were susceptible to mechanical damage by silt particles in the service water system.

Dissimilar metals in cooling system piping.

resulted in accelerated corrosion.

4 ANALYSIS OF OCCURRENCE:

The centrifugal pumps as part of Emergency Core Cooling Systems (ECCS) insure core peak cladding temperatures are maintained within limits during loss-of-coolant accidents.

The charging pumps also provide post-accident cooling in the recirculation mode.

Associated with a boron injection flow path, the pumps insure a minimum shutdown margin of 1.6% delta k/k during Xenon g

decay and cooldown to 200 F.

LDR 82-126/03L lAs noted, one centrifugal charging pump was operable, and consequently no risk to the health or safety of the public was involved.

The occurrence, therefore, constituted operation in a degraded mode permitted by a limiting condition for operation and is reportable in accordance with Technical Specification 6.9.1.9.b.

Action Statement 3.5.2.a requires :

With one ECCS subsystem inoperable, restore the inoperable subsystem to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

CORRECTIVE ACTION

The failed cooler was replaced with a spare of similar design and materials.

No evidence of damage to the lube oil system was noted.

The system was flushed and refilled with new oil, and a visual check showed no leakage existed.

Subsequent analysis of oil samples confirmed this conclusion.

No. 21 Charging Pump was declared operable, and at 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br />, October 21, 1982, Action Statement 3.5.2.a was terminated.

Several failures of charging pump oil coolers have occurred in the past.

Design Change Request (DCR) 2EC-1433 has been issued to install stainless steel / titanium coolers which are better suited for use in the Service Water System.

Parts for the DCR have been ordered, and the change will be completed as the materials become available.

Due to the low rate of cooler failures observed, the newly installed cooler is expected to perform satisfactorily until completion of the DCR.

FAILURE DATA:

Pacific Pumps Horizontal Centrifugal Pump Lube Oil Cooler Prepared By R.

Frahm 4-< '

6' General' Manager -

Salem Operations SORC Meeting No.82-98B

{

Retrieved from "https://kanterella.com/w/index.php?title=05000311/LER-1982-126,_Forwards_LER_82-126/03L-0.Detailed_Event_Analysis_Encl&oldid=4615850"