ML17238A745: Difference between revisions

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{{#Wiki_filter:** MSG.NR 330 TLXA290 PC209 50-249 Q NNC447 CCH 073NN130447>PD WU JOL ZCZC 2*NL PD TDJL MORRIS ILL 13 0742P EST03/13/72 DR PETER A MORRIS DIRECTOR DIVN ON REACTOR LICENSING US ATOMIC ENERGY COMM WASHDC 20545 BT . DPR-25 DRESDEN NUCLEAR POWER UNIT 3 . THIS WILL CONFIRM CONVERSATION AT 16:00 HRS. THIS DATE WITH H. DANCE, VOF REGION 3 COMP(IANCE REGARDING A WIRING ERROR UNCOVERED IN THE LPtI LOGIC TO SPRAY.tHr CONTAINMENT UNDER ACCODENT CONDITIONS. , . .* .). ',, ' . . ' "THE WIRING ERROR 15:00 HRS. ON WHILE .CONDUCT!
{{#Wiki_filter:MSG.NR 330 TLXA290 PC209
NG A 'MONTHLY SURVEILLANCE TEST. ERROR WOULD NOT HAVE BEEN NOTED EXCEPT THAT *-AT THE TIME OF THE SURVEILLANCE A LPCI SYSTEM LOW-FLOW .SWITCH WJS ALSO* OUT OF CALIBRATION.-
                                **                                                    50-249 Q NNC447 CCH 073NN130447>PD WU JOL                             0742P EST03/13/72 ZCZC 2*NL PD TDJL MORRIS ILL 13 DR PETER A MORRIS DIRECTOR DIVN ON REACTOR LICENSING US ATOMIC ENERGY COMM WASHDC 20545 BT               .
THIS SET-UP A CONDITION I.,,,,...
DPR-25 DRESDEN NUCLEAR POWER STA~ION UNIT 3                                           .
* 'DIFFERENT THAT THAT NORMALLY FOUND DURING TH SURVEILLANCE TEST. THE WIRING ERROR WAS CORRECTED ON 3/8/72. -THIS INCIDENT WAS* NOT REPORTED SOONER BECAUSE WHEN THE STATION REVIEWED THE PROOLEM IT FELT TO BE A 30-DAY NOTIFICATION BECAUSE THE LPdI SUB-SYSTEM WAS ALWAYS TH EFFECT OF THIS WIRING ERROR WAS ONLY TO PROHIBIT PERMISSIVE TO BNEX . ,,._ .
THIS WILL CONFIRM CONVERSATION AT 16:00 HRS. THIS DATE WITH H.
$WITCH . -, SPRAY THE DRY WELL WITH GREATER THAN 2/3RDSr 1 CORE HEIGHTH. THIS FUNCTION IN SPITE OF TH WIRING ERROR COULD HAVE BEEN PERF-OMED W P PLATYCPP HRS OF REGION 3 RPT ON NOT VOF. LPCI 15:00 LPCI 3/8/72. 30 LPCI 2/3RDS '*; , .. -231A . :r> U) EST F :t> -*. -4 S2'D:;vo ::on-1 ::t ;:o USAEC HQS GnJN f"-Oo :E: . fT'I nr.= ("") oi-1"'1 :Cl:* :z ,..., /'
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NG A 'MONTHLY SURVEILLANCE TEST. T~E ERROR WOULD NOT HAVE BEEN NOTED EXCEPT THAT *-AT THE TIME OF THE SURVEILLANCE A LPCI SYSTEM LOW-FLOW .SWITCH WJSI.,,,,...
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ALSO* OUT OF CALIBRATION.-* THIS SET-UP A CONDITION
'DIFFERENT THAT THAT NORMALLY FOUND DURING TH SURVEILLANCE TEST.
THE WIRING ERROR WAS CORRECTED ON 3/8/72. -
THIS INCIDENT WAS* NOT REPORTED SOONER BECAUSE WHEN THE STATION
*1NITIALL~ REVIEWED THE PROOLEM IT ~AS FELT TO BE A 30-DAY NOTIFICATION BECAUSE THE LPdI SUB-SYSTEM WAS ALWAYS OPERA~LE. TH EFFECT OF THIS WIRING ERROR WAS ONLY TO PROHIBIT PERMISSIVE         1 TO SPRAY THE DRY WELL WITH GREATER THAN 2/3RDSr CORE HEIGHTH. THIS FUNCTION IN SPITE OF TH WIRING ERROR COULD HAVE BEEN PERF-OMED BNEX        .                  , ._                    .
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Revision as of 20:29, 29 October 2019

Letter Regarding a Wiring Error Uncovered in the LPCI Logic to Spray the Containment Under Accident Conditions
ML17238A745
Person / Time
Site: Dresden Constellation icon.png
Issue date: 03/13/1972
From: Worden W
Commonwealth Edison Co
To: Morris P
US Atomic Energy Commission (AEC)
References
Download: ML17238A745 (2)
v • d • e


Text

MSG.NR 330 TLXA290 PC209

    • 50-249 Q NNC447 CCH 073NN130447>PD WU JOL 0742P EST03/13/72 ZCZC 2*NL PD TDJL MORRIS ILL 13 DR PETER A MORRIS DIRECTOR DIVN ON REACTOR LICENSING US ATOMIC ENERGY COMM WASHDC 20545 BT .

DPR-25 DRESDEN NUCLEAR POWER STA~ION UNIT 3 .

THIS WILL CONFIRM CONVERSATION AT 16:00 HRS. THIS DATE WITH H.

DANCE, VOF REGION 3 COMP(IANCE REGARDING A WIRING ERROR UNCOVERED IN THE LPtI LOGIC, TO .SPRAY.tHr .* .). ',,

CONTAINMENT UNDER ACCODENT CONDITIONS.

' . .

"THE WIRING ERROR WAS-DISCOVERED.~T 15:00 HRS. ON 3/7/7~ 'WHILE .CONDUCT!

NG A 'MONTHLY SURVEILLANCE TEST. T~E ERROR WOULD NOT HAVE BEEN NOTED EXCEPT THAT *-AT THE TIME OF THE SURVEILLANCE A LPCI SYSTEM LOW-FLOW .SWITCH WJSI.,,,,...

ALSO* OUT OF CALIBRATION.-* THIS SET-UP A CONDITION

'DIFFERENT THAT THAT NORMALLY FOUND DURING TH SURVEILLANCE TEST.

THE WIRING ERROR WAS CORRECTED ON 3/8/72. -

THIS INCIDENT WAS* NOT REPORTED SOONER BECAUSE WHEN THE STATION

  • 1NITIALL~ REVIEWED THE PROOLEM IT ~AS FELT TO BE A 30-DAY NOTIFICATION BECAUSE THE LPdI SUB-SYSTEM WAS ALWAYS OPERA~LE. TH EFFECT OF THIS WIRING ERROR WAS ONLY TO PROHIBIT PERMISSIVE 1 TO SPRAY THE DRY WELL WITH GREATER THAN 2/3RDSr CORE HEIGHTH. THIS FUNCTION IN SPITE OF TH WIRING ERROR COULD HAVE BEEN PERF-OMED BNEX . , ._ .

BMN~~Bl$S $WITCH .

-,

W P ~ORDEN PLATYCPP HRS OF REGION 3 RPT ON NOT VOF. LPCI 15:00 ~/7/72 LPCI 3/8/72. 30 LPCI 2/3RDS '*; ,

231A EST

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