ML20137S605

Special Rept 97-01:on 970227,train a RVLIS Declared Inoperable Due to Failed Circuit Board in Transmitter. Transmitter Will Be Replaced During Next Outage W/Applicable Conditions or No Later than Spring 1998

ML20137S605
Person / Time
Site:	Callaway
Issue date:	04/10/1997
From:	Affolter R UNION ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
97-01, 97-1, ULNRC-3553, NUDOCS 9704150190
Download: ML20137S605 (3)

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Cellrkar Plant Post Offwe Box 620 futton, Masauri 65251 Union Etuernic April 10,1997 P3 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Stop Pl-137 Washington, DC 20555-0001 ULNRC-3553 Gentlemen:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT I FACILIT k' OPERATING LICENSE NPF-30 SPECI AL REPORT 97-01 REACTOR VESSEL LEVEL INDICATION SYSTEM CIIANNEL INOPERABLE FOR GREATER TIIAN 30 DAYS This Special Report is submitted pursuant to Technical Specification 3.3.3.6 Action (a) concerning the inoperability of one channel of the Reactor Vessel Level Indication i System.

R. D. 'olter l

' I Manager, Callaway Plant RDA/IIDB/JGB:pjp 5 nelosure l

I 9704150190 970410 l PDR ADOCK 05000403 S PDR 1500S9 5555P5!!!P555 I

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ULNRC-3553 April 10,1997

, , Page 2 cc: Mr. Ellis W. Merschoff Regional Administrator- Acting U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Senior Resident Inspector Callaway Resident OfEce U.S. Nuclear Regulatory Commission 8201 NRC Road l Steedman, MO 65077 j Ms. Kristine M. Thomas (2 copies) l Licensing Project Manager, Callaway Plant l Office of Nuclear Reactor Regulation

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U. S. Nuclear Regulatory Commission Mail Stop 13E16 Washington, DC 20555-2738 3 l

Manager, Electric Department Missouri Public Service Commission '

PO Box 360 Jefferson City, MO 65102 Mr. Thomas A. Baxter Shaw, Pittman, Potts, & Trowbridge 2300 N. Street N.W.

Washington, DC 20037

ULNRC-3553 April 10,1997

,, , , Page 4 i

Special Report 97-01 Reactor Vessel Level Indicating System Channel Inoperable For Greater Than 30 Days This report is submitted in accordance with Technical Specification 3.3.3.6 Action (a) which states "With the number of OPERABLE accident monitoring l

instrumentation channels less than the total number of channels shown in Table 3.3-10, restore the inoperable channel (s) to OPERABLE status within 30 days or prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 within the following 14 days outlining the preplanned alternate method of monitoring, the cause of the inoperability, and the plans and schedule for restoring the channels to operable status."

Technical Specification Table 3.3-10, Accident Monitoring Instrumentation, Step 18, Reactor Vessel Level Indication System, (RVLIS) has a total of two available channels to menitor RVLIS.

On 2/27/97 at 0300, the 'A' train RVLIS was declared inoperable due to a failed circuit board in the transmitter. The transmitter cannot be replaced and calibrated online. It will therefore be replaced during the next outage with applicable conditions or no later than the next refueling outage scheduled for Spring 1998.

The preplanned alternate methods of monitoring include monitoring the core exit thermocouple, pressurizer level, and the Reactor Coolant System subcooling monitor. These three parameters provide diversity in verifying there is adequate core cooling.

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