ML19344F104

LER 80-070/03L-0:on 800809-15,intermediate Range Monitor Sys Problems Encountered During Plant Shutdown,Startup & Normal Operations.Cause Under Speculation.Followup Rept to Be Submitted

ML19344F104
Person / Time
Site:	FitzPatrick
Issue date:	09/08/1980
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
ML19344F099	List: ML19344F098 ML19344F104
References
LER-80-070-03L, LER-80-70-3L, NUDOCS 8009120415
Download: ML19344F104 (3)

Text

NRC FORM 366

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> 8 61 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITTT1 1 INTERIM REPORT: At various times during plant shutdown, startup and normal operation),

a number of Intermediate Range Monitor System problems were encountered. Not all l Ioial l g o i ., i l are reportable events as such but are listed for clarification. No operation of the l

ol6; l plant in a condition less conservative then that allowed by TS Table 3.1-1 occurred. l l

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POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 80-070/03L-0 Page 1 of 2 During plant operations, including normal startup, normal operations and periods where the reactor was shutdown, a number of operational problems associated with the Neutron Monitoring System Intermediate Range Monitors (IRM) were encountered. Sunnarized below is a tabulation of each of the problems encountered including a brief statement relating to the actions required by Technical Specifications Table 3.1-1, if applicable.

DATE TIME DESCRIPTION /IRM STATUS ACTION TAKEN (To meet Technical Specifications Table 3.1-1 requirements) 8/ 9/80 1817 commenced reactor startup/all eight (8) IRM None Required channels operable 8/10/80 0430 IRM A, B and H failed surveillance / Inserted half scrcm on "B" side and IRM C, D,.E, F, and G operable verified remaining five (5) IRH's operab[

8/11/80 1120 Reactor shifted to run mode /IRM A, B and H Reset half scram as IRM's not required remain inoperable in Run Mode 8/11/80 2215 Ifanual scram as required by Bulletin 80-17/ Inserted half scram "B" side and IRM A, B, and H remain inoperable verified remaining five (5) IRM's operabic 8/12/80 1000 "B" and "H" IRM's fully operable following re- Reset half scram placement of signal cable connectors. Connectors had failed due to moisture and/or damage as a result of Control Rod Drive change out work during Refueling Outage,/IRM "A" remains inoperable.

8/12/80 1130 IRM "C" exhibited erratic response /IRM B, D, E, F. Commenced repair of signal cable connectd G, and H remain operable and found the connector center pin had apparently been damaged during previous repair 4

. ATTACHMENT TO LER 80-070/03L-0 Paga 2 cf 2 j i

DATE TIME DESCRIPTION /IRM STATUS ACTION TAKEN i t

8/12/80 1320 IRM "B" failed surveillance /IRM D, E, F, G Commenced investigation of possible test '

and 11 remain operable circuit malfunction 8/12/80 1505 Completed repair of IRM "C" cable connector making None Required i IRM "C" fully operable /IRM C, D E, F, G, and 11 operable 8/12/80 1645 1RM "B" fully operable following adjustment of test None Required circuit /IRM B, C, D, E, F, G, and 11 operable 8/12/80 1955 Commenced reactor startup. IRM's fully operable None Required '

except Channel "A" 8/13/80 0100 IRM "D" failed downscale. Probable cause of downscale None Required

' failure was the result of signal cable connector ,

problem within primary containment /IRM B, C, E, F. C, and 11 operable l 8/13/80 1014 Reactor automatic scram to satisfy the requirements None Required of NRC Bulletin 80-17/all IRM'a operable except A i and D ,

8/13/80 1444 Commenced reactor startup / All IRM's operable None Required j, except A and D 8/13/80 2310 Reactor in the Run Mode. / All IRM's operable None Required (IRM's not required to except A and D be operable when in Run Mode 8/15/80 0945 IRM "B" failed downscale. The cause in unknown / None Required as IRM's are not required IRM A, B and D inoperable to be operable in the Run Mode At the time of submitting thio LER, IRM "A" is failed. Failure is believed to be due to a failed detector.

i-R: placement is currently planned for the next scheduled plant outage in which the plant is placed in the cold shutdown condition. >

I IRM "B" is inoperabic (falled downscale). The cause of failure is unknown but believed to be a bad signal cable connector. Repair will be attempted during the next plant outage which permite entry into the primary containment.

IRM "D" is failed downscale. Cause of failure is believed to be failure of a signal cable connector or detector.  !

Repair will be attempted during the next plant outage which permits primary containment entry. {

i A follow-up report will be submitted when the causes of failure and the repair have been completed.  ;

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