ML19323D374

LER 80-036/03L-0:on 800417,during Normal Operation,Average Power Range Monitor Channel F Operated W/Only One C Level Local Power Range Monitor Input.Caused by Insufficient Administrative Controls.Developing Addl Controls

ML19323D374
Person / Time
Site:	FitzPatrick
Issue date:	05/16/1980
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323D373	List: ML19323D372 ML19323D374
References
LER-80-036-03L, LER-80-36-3L, NUDOCS 8005210506
Download: ML19323D374 (2)

Text

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N AC F02M "l66 U. S. NUCLEAR REGULATORY COMMISSICN (7 77)

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7 8 60_ 68 COCKET NUMBER M 69 EVENT DATE 74 REPORT 0 ATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h 10121 l During normal operation personnel noted APRM F was oc*eratig with only one (1) l

[ o ,3 ; l LPRM input which is contrary to TS Table 3.1-1 Note 10. APRM F was immediately l lO!4l l bypassed. No significant hazard existed. See attachment for details. I lo Isl I l I o 16 I l l lo lil l l 1 o la i I ,,

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42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS ii j o l l LPRM was bypassed making APRM F inoperable. Additional administrative controls l l3 i, j l will preclude recurrence. See attachment for details. 1 l i 121 I I l i l 31 l I litai l  !

7 8 9 80 ST S *. POWE R OTHER STATUS is O RY DISCOVERY DESCRIPTION I1 I 5 l l E j@ l 015181@l NA l l A l@l Operator Observation l ACTivlTV CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Ii Ie 8I 3L2J @ 10Lzl@l NA l l 63 a l 7 tt 44 45 80 PERSONNEL EXPOSURES NUM8ER TYPE DESCRl* TION J l i l 71 d j 0 l 0 l@l Z l@l NA l

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l i l 41 7 8 9 101010 l@l12 11 NA I 80 LOSS OF OR DAMAGE TO FACILITY Q Tv*E DESCRIPTION v lIlTllZl@l 7 8 9 10 NA So l

ISSUE DE CRIPTION

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POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK MUCLEAR POWER PLANT DOCKET NO.50-333 ATTACHHENT TO LER 80- 036/03 L-0 Page 1 of I During normal operations, personnel noted that Average Power Range Monitor (APRM) Channel F was operating with only one (1) "C" level Local Power Range Monitor (LPRM) Input. Technical Specifications Table 3.1-1, Note 10, requires that a minimum of two (2) LPRM inputs from each level must be present for the APRM to be considered operable. The other APRM Channels in the same safety system (Channels "B" and "D") were fully operable with at least eleven (11) LPRM inputs and at least two (2) LPRM inputs for each level.

A review of plant operating records reveals rnat APRM "F" should have been declared inoperable on April 9, 1980 at the completion of a LPRM calibration. At that time APRM Channels "B' and "D" were operable.

Between April 9, 1980 and April 11, 1980 when the problem was discovered, any time period in which either APRM "B" or "D" was inoperable or bypassed, only one (1) APRM would have been available, which is contrary to the requirements of Technical Specifications Table 3.1-1. A review of the operating records indicates that either APRM Channel "B" or "D" was bypassed on seven (7) occasions for a total of approximately seventy-one (71) minutes.

As soon as the problem was discovered, APRM "F" was bypassed and the switch tagged to inform the operator that the switch must remain in the "APRM F Bypass" position unless other action to satisfy Technical Specifications is taken. This action, due to the design of the bypass switch, physically prevented the bypassing of APRM "B" or "D" thus assuring that the requirements of Table 3.1-1 were met. Since the root cause of the problem was the failure of personnel to recognize or communicate the status of APRM "F", the bypassing of APRM "B" or "D" was not recognized as causing operation in conflict with the Technical Specifications.

Accordingly, to preclude recurrence, administrative controls which specifically require a determination of the status of a APRM Channel whenever a LPRM is bypassed, are being developed and wiil be implemented prior to startup following the current refueling outage. No additional action will be required. The event did not represent a significant hazard to the public health and safety.

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