ML18093A606
| ML18093A606 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 01/27/1988 |
| From: | Zupko J Public Service Enterprise Group |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 88-1, NUDOCS 8802020320 | |
| Download: ML18093A606 (4) | |
Text
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() PS~G Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station January 27, 1988
- 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 88-1 This Special Report addresses the circumstances surrounding the inoperability of a radiation monitoring instrumentation channel.
This report is being submitted within fourteen days of the occurrence in accordance with the reporting requirements of Technical* Specification 3.3.3.1.b pursuant to Technical Specification 6.9.2.
8802020320 880127 SPDR ADDCK 05000311 PDR BWL:pc Distribution Tr1c ~r1e1gy People Sincerely yours,
~~<J J. M. Zupko, Jr.
General Manager-
- Salem Operations 95-2189 111 M1 12-8J
3PECIAL REPORT NUMBER. 8--
PLANT IDENTIFICATION:
Salem Generating Station - Unit 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE~
Technical Specification 3.3.3.1 - Radiation Monitoring Instrumentation Channel Inoperable Event Date(s):
1/13/88 Report Date:
1/27/88 This report was initiated by Incident Report No.88-030.
Mode 1 Rx. Power 100%
On January 13, 1988 at 1937 hours0.0224 days <br />0.538 hours <br />0.0032 weeks <br />7.370285e-4 months <br />, the Nuclear Shift Supervisor observed the Air Particulate Detector (APD) pump for 2R15 (Process Monitor -
Noble Gas Effluent -
Condenser Exhaust System) was not running and had apparently seized.
In accordance with the requirements of Technical Specification Action 3.3.3.l.b, Action 26, the ac~ion statement was entered and a preplanned method of sampling was initiated.
A work request was also initiated to investigate the malfunction.
Technical Specification 3.3.3.1.b states:
"With one or more radiation channels inoperable, take the ACTION shown in Table 3.3-6."
Table 3.3-6 states:
"With the number of OPERABLE Channels less than required by the Minimum Channels OPERABLE requirements, initiate the preplanned alternate method of monitoring the appropriate parameter{s),
within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, and:
- 1.
either restore the inoperable Channel{s} to OPERABLE status within 7 days of the event, or
- 2.
prepare and submit a Special Re~ort to the Commission pursuant to Specification 6.9.2 within 14 days following the event outlining the action taken, the cause of the inoperability and the plans and schedule to restoring the system to OPERABLE status.
This Special Report is being prepared because the inoperable channel was not restored to an OPERABLE status within 7 days.
UNI'r 2 SPECIAL REPORT 8~ APPAF;..ENT CAUSE OF OCCURRENCE:
The root cause of the malfunction has been attributed to a partial obstruction in the drain line loop seal of the Air Removal Discharge Piping to the plant vent.
The obstruction had caused the balance of the system to become saturated and rendered the pump in effect "water-locked".
ANALYSIS OF OCCURRENCE:
The R15 channel is used in conjunction with the R19 (Steam Generator Blowdown Process Monitor), R40 (Condensate Process Filter Monitor),
and R46 (Main Steam Line Process Monitor) channels to provide an early indication of a primary to secondary leak in a steam generator.
An alarm on any of these channels is an entry condition for E.I.-I-4.7, Steam Generator Tube Leak.
The initial action required, after verification of automatic actions, is to request a sample to confirm the leakage.
Therefore, had a leak developed in any steam generator with the R15 channel inoperable, the detection capabilities of the remaining systems, e.g., R19 (Steam Generator Blowdown Process Monitor) would have provided an early indication of a primary to secondary tube leak.
CORRECTIVE ACTION:
The obstruction was removed and the channel was restored to an operable status at approximately 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on January 25, 1988.
A recurring task request to open the system to inspect for debris and obstructions on a periodic basis has been submitted to the Station Planning Department.
BL:pc SORC Mtg.88-009
~µ<;-.
General Manager -
Salem Operations
WI'f' ~2 SPECIAL REPORT 8-- APPARENT CAUSE OF OCCURRENCE:
The root cause of the malfunction has been attributed to a partial obstruction in the drain line loop seal of the Air Removal Discharge Piping to the plant vent.
The obstruction had caused the balance of the system to become saturated and rendered the pump in effect "water-locked".
ANAL;~~; o~~EicE-:---__________
- C!__KJ G,-J ;vffl/ -----'-'~----
The R15 channel is used in conjunction with the Rl9, 40, and channels to provide an early indication of a primary to secondary leak in a steam generator.
An alarm on any of these channels is an entry condition for E.I.-I-4.7, Steam Generator Tube Leak.
The initial action required, after verification of automatic actions is to request a sample to*confirm the leakage.
Therefore, had a leak developed in any steam generator with the R15 inoperable, sufficient
\\ indication was available in order to initiate the appropriate corrective action(s).
CORRECTIVE ACTION:
The obstruction was removed and the system has been/will be restored to an operable status.
A recurring task request to open the system to inspect for debris and obstructions during subsequent refueling outages has been submitted to the Station Planning Department.
BL:pc SORC Mtg.88-009 General Manager -
Salem Operations