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| {{Adams
| | #REDIRECT [[05000293/LER-1981-036-03, /03X-01:on 810709,trip Points for Pressure Switche Higher than Tech Specs Limit Found During Surveillance Test. Caused by Drifting of Trip Point of Switches.Switches Replaced W/Rosemount Transmitters]] |
| | number = ML20010B265
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| | issue date = 08/07/1981
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| | title = /03L-0:on 810709,during Testing,Pressure Switches PS-263-53A & PS-263-52A Were Found Higher than Setpoint. Caused by Setpoint Drift.Switches Recalibr
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| | author name = Whitney G
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| | author affiliation = BOSTON EDISON CO.
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| | addressee name =
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| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
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| | docket = 05000293
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| | license number =
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| | contact person =
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| | document report number = LER-81-036-03L, LER-81-36-3L, NUDOCS 8108140287
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| | package number = ML20010B263
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
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| | page count = 1
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| }}
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| {{LER
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| | Title = /03L-0:on 810709,during Testing,Pressure Switches PS-263-53A & PS-263-52A Were Found Higher than Setpoint. Caused by Setpoint Drift.Switches Recalibr
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| | Plant =
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| | Reporting criterion =
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| | Power level =
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| | Mode =
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| | Docket = 05000293
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| | LER year = 1981
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| | LER number = 36
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| | LER revision = 3
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| | Event date =
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| | Report date =
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| | ENS =
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| | abstract =
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| }}
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| =text=
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| {{#Wiki_filter:e NBC FOE *j 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77)
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| * LICENSEE EVENT REPORT CONTROL BLOCK: l l
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| l l
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| l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6
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| l o l 1 l lM l A l P l P l S l 1 l@l 0 l 0 l-l 0 l 0 l 0 l 0 l 0 l - l 0 l 0 l@l 4 l 1 l 1 l ll 1l@l l
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| l@
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| 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 23 26 LICENSE TYPE Jo 57 CATsd CON'T lol11 5$RC lL l@l 01510 l-l 0 l 219 l 3 @l 01710 l 9 l 81 I l@l 018 l Ol ll 8 l 1l@
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| 7 8
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| 60 61 DOCK ET NUMB ER 68 69 EVENT D ATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h I o I 2 I I In performance of Surveillance Tests 8.M.2-2.1.7 Td 8.M.2-2.1.8 pressure switches l
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| I o 131. PS-263-53A and PS-263-52A respectively were found to be higher than the setpoint.
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| l l o g. l l This is in violation of T.S. Table 3.2.B which states 400 PSIG + 25.
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| This is l
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| l o i s i I permissive for core spray and LPCI admission valves. The as-found data for each l
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| Io is l l was: 53A-445 psig and 52A-450 psig.
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| I 10171 i l
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| l 101a 1 I 80 7
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| 8 9 E
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| OE SU8C E COMPONENT CODE SLBCODE SU E
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| 8 9
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| 10 11 12 13 18 19 20 SEQUENTI AL OCCURRENCE REPORT REVtSION LER EVENT YEAR R EPORT NO.
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| COOE TYPE N O.
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| h yg.RO 18 ] 1l l-l 10 l3 l6 l l/l l0 13 l l Ll l-l l0 l a
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| _ 21 22 23 24 26 27 29 29 3J 31 32 TAK AC ON ON PL NT MET O HOURS S8 i FO 8.
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| SUPPLIE MANLFACTURER
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| 33 34 35 36 3
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| 40 di 42 43 44 av CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l o l l The switches were re-calibrated to conform to the T.S. setnoint and an investication I ii,i ; } initiated by I&C who have determined root cause. Set point drift of these narticular
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| ,,,.,, ; switches _ is a recognized trait: they are sensitive to system pressure.
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| Future l
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| li,3gl calibration practice will reflect that experience.
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| :- l 11 1Ai 1 l
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| 80 7
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| e 9 ST
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| % POWER OTHER STATUS ISCO RY DISCOVERY DESCRIPTION N.A.
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| l l Blhl Routine Test l
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| li I5 l lE l@ l 0 l 9 l 0 l@l 7
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| 9 9 1
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| 12 11 44 45 46 80 RELEASED OF RELEASE AMOUNT OF ACTIVtTY LOCATION OF RELEASE N.A.
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| l l
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| N.A.
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| l l1 la l lZ l @ l Z l@l PERSONNEL EXPOS ES Nuv8ER
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| ==DESCRIPTION==
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| l1 l 7 l !0 l0 l0 lhl TYPE @l l
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| Zl N.A.
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| PERSONNE'L iN;UdiES cESCRiPTiOsh NousER N A.
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| I li ia l 10 10 10 l@l 80 7
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| 8 9 11 12 LOSS OF OR OAMAGE TO FACILITY Q TY8E
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| ==DESCRIPTION==
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| %/
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| N.A.
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| l [1],,9] (Z_Jhl 3
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| Pu8uSTv 8108140287 810807 1 NRC USE ONLY DESCRIPT10N b PDR ADOCK 05000293s iSSuEo [2_1,o_jlN lhl S
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| PDR' N.A.
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| I llll1IIIIIIIl5 68 69 80 ;
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| 7 8 9 10 617-746-7900 2
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| tney PHONE:
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| NAME OF PRC?ARER
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| }}
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| {{LER-Nav}}
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