ML17252B007
| ML17252B007 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 01/04/1973 |
| From: | Worden W Commonwealth Edison Co |
| To: | Anthony Giambusso US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17252B007 (1) | |
Text
TWX NR 762 USA EC HQS GTW N
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TLXA210 WAB209 (1606)(1-023336C004002)PD 01/04/73 1557 ICS IPMVEIE MVN ZCZC05156 TOVE MORRIS ILL 236 01-04 848A CST PMSMR A ~IAMDUSSO WUX DEPUTY DIRECTOR FOR REACTOR PROJECT DIRECTORATE OF LICENSING U ** s. ATOMIC COMMISSION WASHDC
SUBJECT:
D.P.R.-25 DRESDEN NUCLEAR POWER STATION U~IT 3:
THIS WILL. CONFIRM A CONVERSATION WITH MR~. DAN CE OF YOUR OFFICE AT i630 HOURS JANUARY 3 CONCERNING DILUTION OF BORON SOLUTION IN
- THE STAND BY LIQUID CONTROL TANK. ON JANUARY 3 AT 0631 HOURS THE STAND BY LIQUID CONTROL T~NK WAS SUPPOSEDLY PLACED ON AIR SPARGE.
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THE DAY. BY 0810 HOURS IT WAS.REPORTED fHAJ THE.TANK WAS OVER FLOWING A VALUE CHECK ON THE SYSTEM DETERMINED THAT IN.ADDITION TO THE AIR SP ARGE
- VALVE, A WAf£R : FILL VALVE WAS ALSO OPEN. THE WATER FILLED VALVE WAS CLDSED AND A BORON SAMPLE WAS TAKEN TO DETERMINE THE BORON CONCENTRAT '
ION.
- AT. THE SAME TIME, IN ANTICIPATION OF THE CONCENTRATION BEING TOO LOW AN ORDERLY SHUT DOWN WAS I NITIATED.
A DISCUSSION WITH THE PEOPLE ON SHIFT REV,EALED THAT THE OPERATOR ERRORED IN VVALVING IN THE TANK FOR AIR SPARGE. A REVIEW O~
OPERATING PRdCEDURES WILL BE MADE TO DETERMINE IF A REVISION OR ADD IT I 0 N CA N BE MA DE T 0 EL I M I NAT E T HE P 0 SS I B IL.I T Y 0 F T H I S S IT U AT I 0 N FROM RE-A OCCURING *. AT THIS TIME LOAD I 'S BEING R~UCED AT THE RATE OF 8* M.W.E.
PER HOUR THIS LOAD DROP WILL CONTINUE *ut-HIL EITHER THE UNIT IS SHUT DOWN OR THE BORON CONCENTRATION IS 3.4.1 OF TECHNICAL SPECIFICATION W. P. WORDEN, SU~T.
COMMONWEALTH EDISON DRESDEN NUCLEAR POWER STATION RT 1 -,.
r10RR IS ILL.
631PEST USAEC HQS GHJN
..~
WITHI~ - L)MITS SHOWN IN FIGURE
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