ML19290F018: Difference between revisions
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{{#Wiki_filter:e | {{#Wiki_filter:e CONTROL BLOCK: 1 | ||
CONTROL BLOCK: 1 | |||
* 1 I l 1 l 1 Ih 6 | * 1 I l 1 l 1 Ih 6 | ||
(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) fo TTl I M l oLICENSEE l C l cCOoE I N 1114 l@l15 010 l 1010 l0 l010 l- l010 l@l411 LICENSE NuMSER 2S 26 11 11 l1 l@lSF CAT LICENSE TYPE 40 I | (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) fo TTl I M l oLICENSEE l C l cCOoE I N 1114 l@l15 010 l 1010 l0 l010 l- l010 l@l411 LICENSE NuMSER 2S 26 11 11 l1 l@lSF CAT LICENSE TYPE 40 I | ||
58 l@ | 58 l@ | ||
* 7 8 9 CON'T | * 7 8 9 CON'T 7 | ||
o 'i 8 | |||
s$8C"' 60 l L l@! 01510101013 il681769i@l0121018 65 oOCK ET NUMB E R EVENT D ATE l a 10 l@l0111017 74 75 REPORT D ATE l a in l@ | s$8C"' 60 l L l@! 01510101013 il681769i@l0121018 65 oOCK ET NUMB E R EVENT D ATE l a 10 l@l0111017 74 75 REPORT D ATE l a in l@ | ||
80 EVENT DESCalPTION AND PROSABLE CONSEOUENCES h | 80 EVENT DESCalPTION AND PROSABLE CONSEOUENCES h | ||
* o 2 l At 2040 with the reactor coolant system at 130 degrens and 750 neia o a i shutdown cooling (S'6C) suction header relief (SI-468-RV setooint 315 nsio) I Shutdown cooling was stopped g o 4 llif ted and failed to reset (T.S. 6.9.1.9.d). | * o 2 l At 2040 with the reactor coolant system at 130 degrens and 750 neia o a i shutdown cooling (S'6C) suction header relief (SI-468-RV setooint 315 nsio) I Shutdown cooling was stopped g o 4 llif ted and failed to reset (T.S. 6.9.1.9.d). | ||
o s land isolated from the RCS at 2042. #11B and #12B retctor coolant pumps i o a 1(RCP) and both steam generators remained operational during the event. I o 7 1 #118 RCP was run ror 30 seconds at 2139 per T.S. 3.4.1. The valve was shut I o a 1and SDC rpstarted at 7716 This it nnt a renetitive occurronce. , | o s land isolated from the RCS at 2042. #11B and #12B retctor coolant pumps i o a 1(RCP) and both steam generators remained operational during the event. I o 7 1 #118 RCP was run ror 30 seconds at 2139 per T.S. 3.4.1. The valve was shut I o a 1and SDC rpstarted at 7716 This it nnt a renetitive occurronce. , | ||
1 | 1 sU.C70E s'ME | ||
sU.C70E s'ME | |||
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'MM" Co s'.Ci!E CoMPoNENTCooE u l0l9l l Cl F @ [Dj@ lZ l@ IV lA lL IV IE IX l@ LPJ@ [Bj | 'MM" Co s'.Ci!E CoMPoNENTCooE u l0l9l l Cl F @ [Dj@ lZ l@ IV lA lL IV IE IX l@ LPJ@ [Bj | ||
* 18 19 20 | * 18 19 20 7 8 9 10 11 12 13 SEQUENTIAt OCCURRENCE REPORT Revision EVENT YE AR REPORT NO. Coo 6 TYPE NO. | ||
7 8 9 10 11 12 13 SEQUENTIAt OCCURRENCE REPORT Revision EVENT YE AR REPORT NO. Coo 6 TYPE NO. | |||
LE R/RO a | LE R/RO a | ||
@ sj,Pog 18 10 l [--J 10 l1 Il I 24 26 lel 27 10 13 I 28 29 ILI 30 l--I 31 LqJ 32 21 22 23 A N ACT o CN PL NT M T D HoVRs s8 i FO 8. suPPtlE MANurACTURER | @ sj,Pog 18 10 l [--J 10 l1 Il I 24 26 lel 27 10 13 I 28 29 ILI 30 l--I 31 LqJ 32 21 22 23 A N ACT o CN PL NT M T D HoVRs s8 i FO 8. suPPtlE MANurACTURER LE_j@l G l@ | ||
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36 l 01 01 01 01 37 40 lYl@ | 36 l 01 01 01 01 37 40 lYl@ | ||
41 l42Yl@ l Zl@ | 41 l42Yl@ l Zl@ | ||
3 lC 44 7111Ol@ 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l -SI-468-RV l was left set at the improper relief pressure folic .ng a | 3 lC 44 7111Ol@ 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l -SI-468-RV l was left set at the improper relief pressure folic .ng a ii li i i surveillance test due to a procedural error. This resulted in the i i,121 I valve lifting and not reseating during the pump venting. t i | ||
ii li i i surveillance test due to a procedural error. This resulted in the i i,121 I valve lifting and not reseating during the pump venting. t i | |||
lilai l I | lilai l I | ||
I s l411 sT ".POWER oTHER STATUS sCo Y oisCoV ERY DESCRIPTION i 5 W@t 0101Ol@l NA l (Lj@l Ooerator Observation I e ACTIVITY Co TENT j REttAst LCCATioN or RETE AsE @ | I s l411 sT ".POWER oTHER STATUS sCo Y oisCoV ERY DESCRIPTION i 5 W@t 0101Ol@l NA l (Lj@l Ooerator Observation I e ACTIVITY Co TENT j REttAst LCCATioN or RETE AsE @ | ||
l l i. I 6 I W @o or attEAsEL.Zj@l AcouNT flA or ACTIVITY | l l i. I 6 I W @o or attEAsEL.Zj@l AcouNT flA or ACTIVITY l | ||
flA @ l i | |||
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! PERsoNNEt ExPosOEs | ! PERsoNNEt ExPosOEs | ||
; Nu... R | ; Nu... R Tv,E oEsCRiPT o~ @ | ||
Tv,E oEsCRiPT o~ @ | |||
li l 71 10 ] O l 0 j@l Z l@l flA l | li l 71 10 ] O l 0 j@l Z l@l flA l | ||
' ' ' ,ERsomE''t mu'! Es '' ** | ' ' ' ,ERsomE''t mu'! Es '' ** | ||
N u. ..E R | N u. ..E R otsCRi, Tion @ . | ||
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l iilai1010 1 . 9 Ol@l ii in flA | l iilai1010 1 . 9 Ol@l ii in flA | ||
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flA l 7 | flA l 7 | ||
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, gesyg l CRtPfio4 ftA l llllllllll1ll1 CS 69 80 - | , gesyg l CRtPfio4 ftA l llllllllll1ll1 CS 69 80 - | ||
7 8 9 to w E OF PREPARER S. M. avis /0. E. Iluseby pro.;.. ( 301)269-4747/4816 I, 8003170 | 7 8 9 to w E OF PREPARER S. M. avis /0. E. Iluseby pro.;.. ( 301)269-4747/4816 I, 8003170 | ||
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LER NO. 80-11 DOCKET NO. 50-317 EVENT DATE 02/08/80 | LER NO. 80-11 DOCKET NO. 50-317 EVENT DATE 02/08/80 REPORT DATE 03/07/80 ATTACHMENT EVENT DESCRIPTION AND PROBABLE CONSE0VENCES: | ||
REPORT DATE 03/07/80 ATTACHMENT EVENT DESCRIPTION AND PROBABLE CONSE0VENCES: | |||
At 2040 with shutdown cooling in operation while conducting reactor coolant pump venting operations (#11B and #128 reactor conlant pumps were vented and operational) shutdown cooling suction header relief valve (SI-468-RV, setpoint 315 + 8 psig) lifted and failed to fully reseat (T.S. 6.9.1.9.d) . The reactor coolant system was at 1300F and 250 psia with a bubble in the pressurizer. When the relief valve opened pressurizer level decreased from 140 to 90 inches (approximately ' | At 2040 with shutdown cooling in operation while conducting reactor coolant pump venting operations (#11B and #128 reactor conlant pumps were vented and operational) shutdown cooling suction header relief valve (SI-468-RV, setpoint 315 + 8 psig) lifted and failed to fully reseat (T.S. 6.9.1.9.d) . The reactor coolant system was at 1300F and 250 psia with a bubble in the pressurizer. When the relief valve opened pressurizer level decreased from 140 to 90 inches (approximately ' | ||
1200 gallons of reactor coolant). The reactor coolant was discharged to the five foot elevation of the Auxiliary Building. The Auxiliary < | 1200 gallons of reactor coolant). The reactor coolant was discharged to the five foot elevation of the Auxiliary Building. The Auxiliary < | ||
Building was immediately vacated as a precautionary measure. Air- . | Building was immediately vacated as a precautionary measure. Air- . | ||
borne activity did not increase. The shutdown cooling system was stopped and isolated from the reactor coolant system at 2042. While the shutdown cooling system was isolated #11B reactor coolant pump was run for 30 seconds at 2138 to satisfy J.S. 3.4.1. The relief valve was shut by installing a gagging device. The shutdown cooling system was returned to service at 2215. Access was restored to all areas of the Auxiliary Building at 0015 on 2/9/80. This is not a repetitive occurrence. | borne activity did not increase. The shutdown cooling system was stopped and isolated from the reactor coolant system at 2042. While the shutdown cooling system was isolated #11B reactor coolant pump was run for 30 seconds at 2138 to satisfy J.S. 3.4.1. The relief valve was shut by installing a gagging device. The shutdown cooling system was returned to service at 2215. Access was restored to all areas of the Auxiliary Building at 0015 on 2/9/80. This is not a repetitive occurrence. | ||
CAUSE DESCRIPTION AND CORRECTIVE ACTIONS: | CAUSE DESCRIPTION AND CORRECTIVE ACTIONS: | ||
The setpoint of this relief valve was changed from 285 psig to 315 psig on 1/24/78. Subsequently, thic valve was tested on 3/20/79 using a procedure which had not been changed to reflect the new setpoint. The . | The setpoint of this relief valve was changed from 285 psig to 315 psig on 1/24/78. Subsequently, thic valve was tested on 3/20/79 using a procedure which had not been changed to reflect the new setpoint. The . | ||
valve was left set at 285 psig following tnis testing. The pump venting on 2/8/80 caused pressure spike which caused the relief valve to open. | valve was left set at 285 psig following tnis testing. The pump venting on 2/8/80 caused pressure spike which caused the relief valve to open. | ||
The valve was not able to reseat since system pressure did not decrease below its blowdown setting. This valve was gagged and later was removed, reset to 315 psig, and returned to service. The test procedure referred to above was revised on 10/10/79 to reflect the 315 psig set-point for RV-468. The setpoint control procedure will be revised to ensure that a copy of all setpoint changes are routed to the surveillance test coordinators so the test procedures can be updated in a timely manner. | The valve was not able to reseat since system pressure did not decrease below its blowdown setting. This valve was gagged and later was removed, reset to 315 psig, and returned to service. The test procedure referred to above was revised on 10/10/79 to reflect the 315 psig set-point for RV-468. The setpoint control procedure will be revised to ensure that a copy of all setpoint changes are routed to the surveillance test coordinators so the test procedures can be updated in a timely manner. | ||
0 4}} | 0 4}} |
Latest revision as of 16:04, 1 February 2020
ML19290F018 | |
Person / Time | |
---|---|
Site: | Calvert Cliffs ![]() |
Issue date: | 03/07/1980 |
From: | Davis S, Huseby D BALTIMORE GAS & ELECTRIC CO. |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
Shared Package | |
ML19290F015 | List: |
References | |
LER-80-011-03L, LER-80-11-3L, NUDOCS 8003170459 | |
Download: ML19290F018 (2) | |
Text
e CONTROL BLOCK: 1
- 1 I l 1 l 1 Ih 6
(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) fo TTl I M l oLICENSEE l C l cCOoE I N 1114 l@l15 010 l 1010 l0 l010 l- l010 l@l411 LICENSE NuMSER 2S 26 11 11 l1 l@lSF CAT LICENSE TYPE 40 I
58 l@
- 7 8 9 CON'T 7
o 'i 8
s$8C"' 60 l L l@! 01510101013 il681769i@l0121018 65 oOCK ET NUMB E R EVENT D ATE l a 10 l@l0111017 74 75 REPORT D ATE l a in l@
80 EVENT DESCalPTION AND PROSABLE CONSEOUENCES h
- o 2 l At 2040 with the reactor coolant system at 130 degrens and 750 neia o a i shutdown cooling (S'6C) suction header relief (SI-468-RV setooint 315 nsio) I Shutdown cooling was stopped g o 4 llif ted and failed to reset (T.S. 6.9.1.9.d).
o s land isolated from the RCS at 2042. #11B and #12B retctor coolant pumps i o a 1(RCP) and both steam generators remained operational during the event. I o 7 1 #118 RCP was run ror 30 seconds at 2139 per T.S. 3.4.1. The valve was shut I o a 1and SDC rpstarted at 7716 This it nnt a renetitive occurronce. ,
1 sU.C70E s'ME
- ^i!
'MM" Co s'.Ci!E CoMPoNENTCooE u l0l9l l Cl F @ [Dj@ lZ l@ IV lA lL IV IE IX l@ LPJ@ [Bj
- 18 19 20 7 8 9 10 11 12 13 SEQUENTIAt OCCURRENCE REPORT Revision EVENT YE AR REPORT NO. Coo 6 TYPE NO.
LE R/RO a
@ sj,Pog 18 10 l [--J 10 l1 Il I 24 26 lel 27 10 13 I 28 29 ILI 30 l--I 31 LqJ 32 21 22 23 A N ACT o CN PL NT M T D HoVRs s8 i FO 8. suPPtlE MANurACTURER LE_j@l G l@
34 W@
35
[.Z_j@
36 l 01 01 01 01 37 40 lYl@
41 l42Yl@ l Zl@
3 lC 44 7111Ol@ 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l -SI-468-RV l was left set at the improper relief pressure folic .ng a ii li i i surveillance test due to a procedural error. This resulted in the i i,121 I valve lifting and not reseating during the pump venting. t i
lilai l I
I s l411 sT ".POWER oTHER STATUS sCo Y oisCoV ERY DESCRIPTION i 5 W@t 0101Ol@l NA l (Lj@l Ooerator Observation I e ACTIVITY Co TENT j REttAst LCCATioN or RETE AsE @
l l i. I 6 I W @o or attEAsEL.Zj@l AcouNT flA or ACTIVITY l
flA @ l i
! PERsoNNEt ExPosOEs
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li l 71 10 ] O l 0 j@l Z l@l flA l
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7 8 9 to w E OF PREPARER S. M. avis /0. E. Iluseby pro.;.. ( 301)269-4747/4816 I, 8003170
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LER NO. 80-11 DOCKET NO. 50-317 EVENT DATE 02/08/80 REPORT DATE 03/07/80 ATTACHMENT EVENT DESCRIPTION AND PROBABLE CONSE0VENCES:
At 2040 with shutdown cooling in operation while conducting reactor coolant pump venting operations (#11B and #128 reactor conlant pumps were vented and operational) shutdown cooling suction header relief valve (SI-468-RV, setpoint 315 + 8 psig) lifted and failed to fully reseat (T.S. 6.9.1.9.d) . The reactor coolant system was at 1300F and 250 psia with a bubble in the pressurizer. When the relief valve opened pressurizer level decreased from 140 to 90 inches (approximately '
1200 gallons of reactor coolant). The reactor coolant was discharged to the five foot elevation of the Auxiliary Building. The Auxiliary <
Building was immediately vacated as a precautionary measure. Air- .
borne activity did not increase. The shutdown cooling system was stopped and isolated from the reactor coolant system at 2042. While the shutdown cooling system was isolated #11B reactor coolant pump was run for 30 seconds at 2138 to satisfy J.S. 3.4.1. The relief valve was shut by installing a gagging device. The shutdown cooling system was returned to service at 2215. Access was restored to all areas of the Auxiliary Building at 0015 on 2/9/80. This is not a repetitive occurrence.
CAUSE DESCRIPTION AND CORRECTIVE ACTIONS:
The setpoint of this relief valve was changed from 285 psig to 315 psig on 1/24/78. Subsequently, thic valve was tested on 3/20/79 using a procedure which had not been changed to reflect the new setpoint. The .
valve was left set at 285 psig following tnis testing. The pump venting on 2/8/80 caused pressure spike which caused the relief valve to open.
The valve was not able to reseat since system pressure did not decrease below its blowdown setting. This valve was gagged and later was removed, reset to 315 psig, and returned to service. The test procedure referred to above was revised on 10/10/79 to reflect the 315 psig set-point for RV-468. The setpoint control procedure will be revised to ensure that a copy of all setpoint changes are routed to the surveillance test coordinators so the test procedures can be updated in a timely manner.
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