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| {{Adams
| | #REDIRECT [[05000267/LER-1979-032-03, During Testing,Four of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Would Not Trip.Caused by Dirt Accumulation in Electrical Switches.Switches Replaced]] |
| | number = ML19250C066
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| | issue date = 10/03/1979
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| | title = /03X-1:on 790913,during Testing,Four Helium Circulator Seal Malfunction Pressure Differential Switch Units Would Not Trip or Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches
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| | author name = Gahm J
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| | author affiliation = PUBLIC SERVICE CO. OF COLORADO
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| | addressee name =
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| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
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| | docket = 05000267
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| | license number =
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| | contact person =
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| | document report number = LER-79-032-03X, LER-79-32-3X, NUDOCS 7911060481
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| | package number = ML19250C064
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
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| | page count = 2
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| }}
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| {{LER
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| | Title = /03X-1:on 790913,during Testing,Four Helium Circulator Seal Malfunction Pressure Differential Switch Units Would Not Trip or Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches
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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 = 05000267
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| | LER year = 1979
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| | LER number = 32
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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:.. 7 ',
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| uCENSEE EVENT REPORT l
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| l l
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| l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)
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| CONTROL BLOCK: l 1
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| 7 8 9 LICEreSEE CODE 14 15 LICENSE NUh'SER 25 26 LaCENSE TYPE JO 57 CAT 58 CON'T lL @ 0l S l 0l 0 l 0 l 2 l 6 l 7 @l 0 l 9 l l l 3 l 719 l@l1 10 10 l3 l7 lo l@
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| 8 60 61 DOCKET NUMSER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h c 2 lDuring testing, it was discovered that four of twelve helium circulator seal malfunc-l
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| [ tion pressure differential switch units either would not trip or tripper outside the 1
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| o 3
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| 0,4 l limits of LCO 4. 4.1, Table 4. 4-3.
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| Reportable per Technical Specification AC 7.5.2(b)1 j, o
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| 5 jand AC 7. 5. 2(b) 2.
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| No effect on public health or safety.
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| Redundant system available l
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| 0 6] land operable. Similar reports RO 77-47 and RO 78-27.
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| 9 7
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| 8 9
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| 10 11 12 13 18 19 20 SEOUENTI AL OCCURRENCE REPORT REVISION LE R 'RO EVENT YEAR REPORT NO.
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| CODE TYPE N O.
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| b REQRT l7l9l l-l 0
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| ,,,,, 21 22 23 24 26 27 28 29 30 31 32 KEN AC O ONP NT ME HOURS S8 FOR 8.
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| 33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h IITT Barton Model 289 pressure differential switches failed to actuate at trip point l
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| i O
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| d6e tc dirt accumulation in electrical switches. Affected switches readiusted to I
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| i i
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| g jproper trip points.
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| Trip settings being checked on a monthly basis. Problem under I
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| investigation.
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| l 3
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| L'_1__I I I
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| 7 8 9 80 STA
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| % POWER OTHER STATUS DISCO RY DISCOVERY DESCRIPTION lE lh l 0 l 0 l 0 l@l N/A l
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| l C l@l Operability Test l
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| 1 5
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| ACTIVITY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Z l @ l Z l@l N/A l
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| N/A l
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| 1 6
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| 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMPER TYPE
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| ==DESCRIPTION==
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| l0 l0 l0 l@l Z l@lN/A l
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| 1 7
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| PERSONNEL INJU IES NUMSER
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| ==DESCRIPTION==
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| l0l0 0 l@l N/A l
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| i a
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| 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY (A*)
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| j p7]
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| J4 2
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| TYPE
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| ==DESCRIPTION==
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| i y l Z l@l N/A 7
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| 8 9 10 80 iSSUEf@lDE CRIPTION e
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| N N/A l
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| 8 9 to 68 69 80 5 PHONE:
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| NAME OF PREPARER j a
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| . L.-.- -.
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| OCCt1UtINCY REPORT DISTRIBLTION Number of Coeter Depa rtment o f Ener gy - - - - - - - - - - - - - - - - - ' - - - - - - - - - - - -
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| 1 (P Letter)
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| San Francisco Operations Office Attna California Patent Croup 1333 Broadway Oakland, Cclifornia 94612 Departmen t o f Energy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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| 1 (P Letter)
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| Office of Nuclear Engineering Programs Washington, D.C.
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| 20545 Depar tment o f Ener gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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| 1 (P Letter)
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| Nuclear Rasetor Programs Branch Nuclear Power Development Division Main Stop T309 Washington, D.C.
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| 20545 De p a rtmen t o f Ener gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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| 1 (P Letter)
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| Attu: Senior Program Coordinatoe P. O. Boz 81325 San Diego, California 92128 ltr. Zarl V. Seyfrit. Director 1
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| (original of P Letter Region IV and Copy of LER)
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| Office of Inspection and Enfo cament Nuclear Regulatory Conssission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Di r e c to r - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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| 1 J Letter, LER)
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| Office of Management Information and Program Control U. S. Nuclear Regulatory Cotumission Washington, D.C.
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| 20555 W. M. Hawkins, Site Manager --------- ---------------- 10 (Original of 77LC Letter General Atomic Company plus Two Copies, one P. O. Box 426 Copy of P Letter, One Plattavilla, Colorado 80651 Copy of LER)
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| NRC Resident Site Inspector --------------------------
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| 1 (P Letter, LIR) 1271 345
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| }}
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| {{LER-Nav}}
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