05000348/LER-1986-001, :on 860110,discovered That Containment Atmosphere Particulate Radioactivity Monitor Inoperable Due to Improper Valve Alignment.Caused by Personnel Error. Monitor Returned to Svc Upon Discovery

:on 860110,discovered That Containment Atmosphere Particulate Radioactivity Monitor Inoperable Due to Improper Valve Alignment.Caused by Personnel Error. Monitor Returned to Svc Upon Discovery

ML20137U502
Person / Time
Site:	Farley
Issue date:	02/07/1986
From:	Mcdonald R, Woodard J ALABAMA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
LER-86-001, LER-86-1, NUDOCS 8602190223
Download: ML20137U502 (3)

LER-1986-001, on 860110,discovered That Containment Atmosphere Particulate Radioactivity Monitor Inoperable Due to Improper Valve Alignment.Caused by Personnel Error. Monitor Returned to Svc Upon Discovery

Event date:
Report date:
3481986001R00 - NRC Website

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.,.. n At 1426 on 1-10-86, it was discovered that the containment atmosphere particulate radioactivity monitor (R-ll) was inoperable due to improper valve alignment. The valve misalignment was the result of two valves having been mislabeled.

Investigation revealed that R-11 had been inoperable since 1030 on 1-9-86.

Since it had not been realized at the time that R-11 was inoperable, the Technical Specification 3.4.7.1 requirement to obtain and analyze samples of the containment atmosphere once per twenty four hours was not met. Upon discovery on 1-10-86, R-11 was returned to service The inoperability of R-ll was caused by personnel error.

The valves had been Enislabeled at some time. However, it has not been possible to determine exactly when the valves were mislabeled or who mislabeled the valves.

It hns been determined that the valves had been labeled properly up until 12-3-85.

Since R-ll had operated properly until 1-9-86, it is believed that the valves were inadvertently mislabeled at some time between 12-3-05 and 1-9-86.

The health / safety of the public was not affected by this event.

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Joseph M. Farley - Unit 1 0 l5 l0 [0 [0 l 3l4 [ 8 8l 6 Oj 0 l 1 0l 0 0l 2 OF 0l 2 TEXT ut more space a recured, use addraat AAC Fwm J66NsJ tlh At 1426 on 1-10-86, it was discovered that the containment atmosphere particulate radioactivity ranitor (R-11) was inoperable due to improper valve clignment.

Investigation revealed that R-ll had been inoperable since 1030 on 1-9-86. 'Since it had not been realized at the time that R-11 was inoperable, the Technical Specification 3.4.7.1 requirement to obtain and analyze samples cf the containment atmosphere once per twenty four hours was not met.

Upon discovery on 1-10-86, R-ll was returned to service.

On 1-9-86, two Health Physics technicians were assigned to switch R-ll and R-12 (the containment atmosphere gaseous radioactivity monitor) from the inboard pump to the outboard pump so that the inboard pump could be lubricated. This operation was completed at approximately 1030 and was performed according to procedure. However, two valves had been mislabeled previously. This led to VI (the R-ll bypass valve) being opened and V2 (the R-ll inlet valve) being closed. Therefore, R-11 was bypassed.

The operation of R-12 was not affected by the valve misalignment.

Later in the day on 1-9-86, R-ll and R-12 were switched back to the inboard pump after the lubrication had been completed. At 1426 on 1-10-86, during an investigation of problems with the operation of the inboard pump, it was discovered that valves VI and V2 had been mispositioned due to the valves

- having been mislabeled.

L*pon discovery, R-Il was returned to proper operation by positioning the valves correctly and placing the outboard pump in operation. The identification tags on VI and V2 were placed properly and v;rified. As a precaution, the valve alignment on other radiation monitors on both units covered by Technical Specifications was verified to be correct.

Due to the valve misalignment, the R-ll reading decreased from cpproximately 6000 to approximately 1500 counts per minute during the period from 1030 on 1-9-86 to 1426 on 1-10-86.

The R-ll readings are logged by Operations personnel at least once per twelve hours and by Health Physics personnel on a daily basis.

The shift supervisor and the plant operators had n:ticed the decrease in the count rate but failed to investigate fully.

The cppropriate personnel have been counseled concerning their failure to recognize the low count rate and take appropriate corrective action.

The inoperability of R-11 was caused by personnel error. The valves had been mislabeled at some time.

However, it has not been possible to determine cxactly when the valves were mislnbeled or who mislabeled the valves.

It has been determined that the valves had been labeled properly up until 12-3-85.

Since R-11 had operated properly until 1-9-86, it is believed that the valves w;re inadvertently mislabeled at some time between 12-3-85 and 1-9-86.

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3 Malling Address Atibam2 Powst Comp 2ny 600 North 18th Strset Post Office Box 2641 Birmingham. Alabama 35291 Telephone 205 783-6090 R. P. Mcdonald Senior Vice President Flintridge Building

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February 7, 1986 Docket No. 50-348 Document Control Desk U. S. Nuclear Regulatory Comission Washington, D.C.

20555 Joseph M. Farley Nuclear Plant - Unit 1 Licensee Event Report No. LER 86-001-00

Dear Sir:

Joseph M. Farley Nuclear Plant, Unit 1, Licensee Event Report No. LER 86-001-00 is being submitted in accordance with 10CFR50.73.

If you have any questions, please advise.

Yours very tru

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R. P. Mcdonald RPM / JAR: dst-030 Enclosure cc:

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