ML18022A600
| ML18022A600 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 01/04/1988 |
| From: | Watson R CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| HO-870579-(O), SHF-10-13510C, NUDOCS 8801130337 | |
| Download: ML18022A600 (5) | |
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ACCELERLTED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RZDS)
ACCESSION NBR:8801130337 DOC.DATE: 88/01/04 NOTARIZED: NO FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina AUTH.NAME AUTHOR AFFILIATION WATSON,R.A.
Carolina Power 6 Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
DOCKET 05000400
SUBJECT:
Special rept:on 871102,vent stack 5A wide range gas monitor declared inoperable.
DISTRIBUTION CODE:
IE22D COPIES RECEIVED:LTR ENCL~ SIZE:
TITLE: 50.73 Licensee Event Report (LER), Incident Rpt, etc.
NOTES:Application for permit renewal filed.
I 0500040+
RECIPIENT ID CODE/NAME PD2-1 LA BUCKLEY,B INTERNAL: ACRS MICHELSON AEOD/DOA AEOD/DSP/ROAB ARM/DCTS/DAB NRR/DEST/ADS NRR/DEST/ELB NRR/DEST/MEB NRR/DEST/PSB NRR/DEST/SGB NRR/DLPQ/QAB NRR/DREP/RAB NRR D
S SIB
-EG F 02 RES TE ORD,J RGN2 FILE 01 EXTERNAL: EG&G GROH,M H ST LOBBY WARD NRC PDR NSIC MAYS,G COPIES LTTR ENCL 1
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1 RECIPIENT ID CODE/NAME PD2-1 PD ACRS MOELLER AEOD/DSP/NAS AEOD/DSP/TPAB DEDRO NRR/DEST/CEB NRR/DEST/ICSB NRR/DEST/MTB NRR/DEST/RSB NRR/DLPQ/HFB NRR/DOEA/EAB NRR/DREP/RPB NRR/PMAS/ILRB RES DEPY GI RES/DE/EIB FORD BLDG HOY,A LPDR NSIC HARRIS,J COPIES LTTR ENCL 1
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TOTAL NUMBER OF COPIES REQUIRED:
LTTR 46 ENCL 45
CIPRL Carolina Power & Light Company HARRIS NUCLEAR PROJECT P. 0.
Box 165 New Hill, North Carolina 27562 JAN File Number'SHF/10-13510C Letter Number:
H0-870579 (0)
United States Nuclear Regulatory Commission Attention'Document Control Desk Washington, DC 20555 HARRIS NUCLEAR PROJECT UNIT 1
DOCKET NO. 50-400 LICENSE NO. NPF-63 NRC 14-DAY SPECIAL REPORT Gentlemen:
In accordance with Technical Specifications 3.3.3.6 and 6.9.2 for the Shearon Harris Nuclear Power
- Plant, Unit No.
1, Carolina Power
& Light Company hereby submits this Special Report.
This Special Report concerns operability of a radiation monitor.
Very truly yours, R. A. Watson Vice President Harris Nuclear Project JRJ:acm Enclosure cc:
Dr. J.
N. Grace (NRC-RII)
Mr. B. Buckley (NRR)
Mr. G. Maxwell (NRC-SHNPP) 880ii30337 880i04 PDR ADOCK OS000400 S
'Sl
wiRadioactive Gaseous Effluent Monitor Special Report
~Back nnxnd:
Vent sfack 52k wide range gas
- monitor, (WRGM) glWV-3547-1 was declarad inoperable under Technical Specification 3.3.3.11, Radioactive Laseous Effluent Monitoring Instrumentation, on November 2,
- 1987, at 1400.
This was due to a potential loss of sample,',"Slow caused by calibration of the stack flow transmitter and isn-kin~c sampling skid.
At that time, it was not recogaized that the calibration would also make the monitor inopeaxble under Technical Specification 3.3.3.6, Accident Monitmxng Instrumentation.
This determination was not made by Operations personnel until December 18, 1987.
Efforts to-~urn the monitor to operable status within 7
days have,been unsuccessful, thus the need for this special
- report, which.xs submitted pursuant to Technical Specification 3.3.3.6, Action 'X.
Because~of ~ late declaration of inoperability under Technical Speci$3matioa 3.3.3.6, this special report was not submitted within'l4 days as required by the Technical Specification 3.3.3.6, Action.'L.
- %his deviation from Technical Specifications will be repo~ im msubsequent License Event Report.
Des ian M Event:
The",mme stark 5A WRGM sample flow rate is designed to be varied accord3mg.-,?o Xhe stack process flow rate measured by the stack flow.~smi~r and iso-kinetic sampling skid; ho~ever, the plant has. expariencad problems in calibrating the stack flow transmitter and.=.isa-, kiowa sampling skid since initial plant startup.
Due to the erxatxa Slow up the stack, it is difficult to meet the tolerances
",oX the calibration procedure for the stack flow meter and.,isn-kineMc sampling skid.
Because of this, the stack WRGM has'"been ~mzated in "Spec Form Control," which adjusts the sample flowe~
correspond to the maximum design flow rate out of the stack
'...This provides very conservative monitor readings.
The stack:%3.tm.;~er itself has been successfully calibrated and is used aus+an~icator of stack flow rate.
On~Octnber."~
- 1987, the stack flow meter failed and a work order was generated to repair it.
After repair, it was necessary to attend;", zeca&bration of the flow meter and.
the iso-kinetic sampli~ -skhL.
The vent stack 5A WRGM was declared inoperable under-Technical Specification 3.3.3.11 at 1400 on November 2, 1987 due tn ehe.potential loss of sample flow during calibration of the stack Slow.Transmitter and iso-kinetic sampling skid.
Calibration requires manipulation of the WRGM data base which has the MEM/H0-.8705790/2/OS1
Descri tion of Event:
(continued) potential for causing the WRGM to lose sample flow.
For this
- reason, the WRGM was declared inoperable even though it was working correctly at the time.
The particulate-iodine-gas (PIG) monitor on stack 5A (REM-1WV-3547) was also inoperable due to the same reason.
During calibration of the stack flow meter and iso-kinetic sampling skid (MST-I0413),
a problem was identified with the mass flow meter which controls actual sample flow for the monitor. It was necessary to recalibrate the mass flow meter before proceeding.
The plant experienced unexpected problems while attempting to calibrate the mass flow meter and requested information from the vendor (Kurz) to correct the problem.
The plant did not receive the vendor information until December 3,
1987.
Using the vendor information, the mass flow meter still failed calibration and had to be replaced.
The new mass flow meter was successfully calibrated and MST-I0413 was again initiated to calibrate the stack. flow transmitter and iso-kinetic sampling skid.
This calibration was unsuccessful due to the erratic vent stack flow discussed earlier.
A Plant Change Request (PCR"2670) was generated to resolve the erratic flow problem.
The stack 5A WRGM was declared operable at 1830 on December 23,
- 1987, utilizing the Spec Form Control of sample flow.
The compensatory actions required by Technical Specifications 3.3.3.11, Table 3.3-13, Actions 46, 47, and 49 required an auxiliary sampler to be hooked up to continuously monitor the stack while the installed effluent monitor was inoperable.
This sampler was installed at the purge air inlet connection for the iso-kinetic sampling skid.
Since calibration of the flow meter on this skid would require disconnecting sample tubing, the inlet and outlet isolation valves to the skid were closed to prevent room air from being drawn into the auxiliary sampler.
All compensatory measures for gaseous effluent and accident monitoring for stack 5A were satisfied.
Cause.
The monitor was declared inoperable initially due to the potential loss of sample flow that could occur while attempting calibration of the stack flow transmitter and iso-kinetic sampling skid.
The cause of the delay in restoring the monitor to service was due primarily to the unexpected problems associated with the calibration of the mass flow meter and unusually long delay in receiving the vendor information.
The cause of the failure of the mass flow meter, which was discovered while attempting calibration of the stack flow meter and iso-kinetic sampling
- skid, is not known'EM/HO-8705790/3/OS1
Cause:
(continued)
The cause of the delay in reporting this event was personnel error.
Plant Operations personnel issued Equipment Inoperable Record (EIR) 8RW-ill to address the inoperability of vent stack 5A WRGM.
This EIR addressed the effluent monitoring Technical Specification (3.3.F 11) requirements to be met when the WRGM was inoperable.
Personnel failed to recognize that the requirements for accident monitoring specified by Technical Specification 3.3.3.6 were also affected.
This was not specified on the standard EIR form for Technical Specification 3.3.3.11 monitors.
Since the LCO action requirements specified on EIRs are used to ensure that the required actions are implemented within the required time
- limits, and since an LCO against Technical Specifications 3.3.3.6 requirements was not identified, the need for the special report was not recognized until December 18, 1987.
Consequently, a noncompliance with Technical Specification 3.3.3.6, Action C,
resulted since this special report was not submitted to the NRC within 14 days.
This noncompliance will be addressed in subsequent LER.
Corrective Actions.
The corrective actions status were to replace flow control to "Spec with the stack monitor Task Force.
taken to restore the monitor to operable the mass flow meter and restore the sample Form Control."
The reliability problems systems is under evaluation by a Special MEM/HO-8705790/4/OS1