ML18093B145
| ML18093B145 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/09/1988 |
| From: | Miller L Public Service Enterprise Group |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 88-6, NUDOCS 8809160202 | |
| Download: ML18093B145 (3) | |
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Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
Dear Sir:
SALEM GENERATING STATION LICENSE NO. DPR-75 DOCKET NO. 50-311 UNIT NO. 2 SPECIAL REPORT 88-6 September 9, 1988 This Special Report addresses the circumstances surrounding the inoperability of the No. 2 Fire Pump, occurring on August 11, 1988, for greater than seven days.
This report satisiies the reporting requirements of Technical Specification Action Statement 3.7.10.1.2.a. pursuant to Technical Specification 6.9.2.
It is being submitted within 30 days as per the Action Statement.
MJP:pc Distribution 8809160202 880909 PDR ADOCK 05000311 S
PDC The Energy People Sincerely yours,
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L. K. Miller General Manager-Salem Operations
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- .:UNIT 2 SPECIAL REPORT.6
~PLANT IDENTIFICATION:
Salem Generating Station - Unit 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:
No. 2 Diesel Fire Pump Inoperable -
Day Tank Level Less Than 300 Gallons For Greater Than 7 Days Due to a Design/Equipment Problem Event Date (s):
8/11/88 Report Date:
9/09/83 This report was initiated by Incident Report No.88-318.
CONDITIONS PRIOR TO OCCURRENCE:
Mode 1 Rx. Powe:r; 87%
Load 950 MWe DESCRIPTION OF OCCURRENCE:
On August 11, 1988, the Technical Specification Surveillance 4.7.10.1.2.b was initiated for the No. 2 Diesel Fire Pump, however, the pump would not come up to full speed.
Investigation revealed that the No. 2 300 gallon Diesel Fire Pump Day Tank was below required pump operating levels.
Technical Specification Surveillance 4.7.10.1.2.a requires that the tank contain at least 300 gallons of fuel, verified every 31 days.
With this tank near empty, coupled with the reason it was (see Apparent Cause of Occurrence section), it can be assumed the No. 2 Fire Pump has been inoperable for great2r than seven days.
Technical Specification Action Statement 3.7.10.1.a states:
"With one pump and/or water supply inoperable, restore the inoperable equipment to OPERABLE status within 7 days or, in lieu of any other report required by Specification 6.9.1, prepare and submit a Special Report to the Commission purs~ant to Specification 6.9.2 within the next 30 days outlining the plans and procedures to be used to provide for the loss of redundancy in this system.
The provisions of Specification 3.0.3 and 3.0.4 are not applicable."
APPARENT CAUSE OF OCCURRENCE:
The reason the day tank was low has been attributed to a design/equipment problem.
The fuel level indicator sight glass was plugged at* the low end of the suction lin2 to the sight glass.
When the sight glass was tapped, the plug ~ame loose and the oil in the sight glass drained to the tanks true level.
ANALYSIS OF OCCURRENCE:
The operability of the diesel fire pumps ensures continued.
operability of the water deluge Fire Suppression Systems.
There are two diesel fire pumps each with independent fuel supply systems.
The
~':~UNI~ 2 SPECIAL REPORT.6 *
,ANALYSIS OF OCCURRENCE:
(cont'd) pumps are 100% redundant to each other.
During the assumed inoperable period, the No. 1 Fire Pump remained operable.
Therefore, the Fire Suppression System would have functioned as designed in the event of a fire.
With 300 *gallons of fuel, a pump can operate for approximately eight hours.
Since the No. 2 Fire Pump can be assumed to have been inoperable for greater than 7 days, this report is required by Technical Specificat1on Action Statement 3.7.10.a pursuant to Technical Specification 6.9.2.
CORRECTIVE ACTION:
The tank was filled with fuel oil to the appropriate level upon discovery of the tanks low level.
Both day tanks will be drained and cleaned of foreign material~
This event will be reviewed with applicable Fire Protection and Operations personnel to educate them on the potential shortcomings of level indicating devices.
The sight glass on each of the two day tanks was replaced with new ones.
Engineering will investigate the blockage of the sight glass addressing the material, its source, and preventive ~easures against recurrence.
Also, they will review this sight glass application and determine if a better or alternate method for gauging the tank oil level is appropriate.
Engineerng will review the use of all local reservoir level {primary) indicators important to safety to identify potential concerns and to address appFopriate corrective action.~~
MJP:pc SORC Mtg.83-074 General Manager -
Salem Operations