3F0692-10, Special Rept 92-02:on 920514,waste Gas Decay Tank Hydrogen & Oxygen Monitoring Channels Removed from Svc & Not Returned to Operable Status within 14 Days.Caused by Need to Facilitate Maint.Ts Amend Will Be in Place by Sept 1992

Special Rept 92-02:on 920514,waste Gas Decay Tank Hydrogen & Oxygen Monitoring Channels Removed from Svc & Not Returned to Operable Status within 14 Days.Caused by Need to Facilitate Maint.Ts Amend Will Be in Place by Sept 1992

ML20097G677
Person / Time
Site:	Crystal River
Issue date:	06/12/1992
From:	Boldt G FLORIDA POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
3F0692-10, 3F692-10, 92-02, 92-2, NUDOCS 9206170214
Download: ML20097G677 (2)

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Power C OR PQ R AT ION I

Crystet River Unit 3

- Docket No. 50-302 June 12, 1992 3F0692-10 U; S. Nuclear Regulatory Commission .

Attention: Document Control = Desk Washington, D.C; 20555

Subject:

Special Report 92-02

Dear Sir:

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Enclosed is Special Report 92-02 which is submitted-in accordance with- ]

Technical Specification 3.3.3.10. '

Should there be_ any questions, please contact this office.. '

Very truly yours,-

e d(fYN G. ; L/- Boldt _

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. Vice President,_ Nuclear Production

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! xc:  : Regional Administrator,(Region 11 NRR Project Manager- ._

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. POST OFFICE BOX 219 a CRYSTAL RIVER, FLORIDA 32d260219 + (904) 7956486 A Florida Progress Company l-ll

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4 SPECIAL REPORT 92-Q2 Backaround l Crystal River Unit 3 (CR-3) Technical Specification 3.3.3.10, Waste Gas

Decay Tank-Explosive Gas Monitoring Instrumentation, requires the following

l The Waste Gas Decay Tanks (WGDT) shall have one hydrogen and one oxygen monitoring thannel OPERABLE.

2 APPLICABlllTY: ALL MODES.

ACTION: a. With the number of OPERABLE channels less than required above, i operation of this system may continue, provided grab samples are collected and analyzed:

(1) at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during degassing operations,_

(2) at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during other operations,

b. If the affected channel (s) can not be returned to OPERABLE status within 14 days, submit a special report to the Commission pursuant to Specification 6.9.2 within 30 days describing the reasons for inoperability and a schedule for corrective action.

l The WGDT Hydrogen and Oxygen Monitoring Channels were removed from service (and determined to be inoperable) on May 14, 1992 and were not_ returned to operatinnal status within 14 days. This report is submitted to fulfill the

Special Report requirement of Technical Specification 3.3.3.10, ACTION (b).

Reason for Hydrocen and Oxyaen Monitor Inqperability The WGDTs were removed from service during the Refuel 8 outage to facilitate maintenance on the WGDTs' relief and check valves. The WGDTs were '

depressurized and vented to the Auxiliary Building ventilation system. _The hydrogen and oxygen monitoring instruments were declared inoperable because

these instruments.can not effectively monitor hydrogen and oxygen

concentrations when tank pressures are less than five-psig. With the WGDTs

vented, CR-3 can not comply with ACTION (a) above in that there is insufficient pressure to obtain grab samples.

Schedule for Corrective Action

i. The WGDT hydrogen and oxygen monitoring instruments are expected to be returned to service when repairs are complete for the WGDTs' check and relief valves. This will be accomplished prior to restart from the Refuel 8 outage.

Technical Specification Amendment #141 will correct this problem by changing the APPLICABILITY requirement for Section 3.3.3.10 to "During Waste Gas l System Operation". Therefore, whenever the system is vented --d taken out of service for outages, the ACTION will not apply. This amenument will be in place by September 1,.,2.

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