ML20084S301
| ML20084S301 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 01/04/1973 |
| From: | Worden W COMMONWEALTH EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20084S296 | List: |
| References | |
| NUDOCS 8306160475 | |
| Download: ML20084S301 (1) | |
Text
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SUBJECT:
D.P.R.-25 DRESDEN NUCLEAR POWER STATION UNIT 3:
IHIS WILL CONFIRM A CONVERSATION WITH MR H. DANCE OF YOUR OFFICE e
AT 1630 HOURS JANUARY 3 CONCERNING DILUTION OF BORON SOLUTION IN THE STAND BY LIQUID CONTROL TANK. ON JANUARY 3 AT 0631 HOURS THE e
STAND BY--LIQUID CONTROL TANK WAS SUPPOSEDLY PLACED ON AIR SPARGE.
THIS WAS DONE IN PREPARATION FOR A BORON SAMPLE TO BE TAXEN LATER m,g DAY. BY 0810 HOURS IT WAS REPORTED THAT THE TANK WAS OVER FLOWING e
,m g ALUE CHECX ON THE SYSTEM DETERMINED THAT IN ADDITION TO THE AIR SP g
V ARGE VALVE, A WATER FILL VALVE WAh ALSO OPEN. THE WATER FILLED VALVE WAS g
CLOSED AND A BORON SAMPLE WAS TAXEN TO DETERMINE THE BORON CONCENTRAT 10N.
g AT THE SAME TIME, IN ANTICIPATION OF THE CONCENTRATION BEING 100 LOW AN ORDERLY SHUT DOWN WAS INITIATED.
g A DISCUSSION WITH THE PEOPLE ON SHIFT REVEALED THAT THE OPERATOR ERRORED IN VVALVING IN THE TANK FOR AIR SPARGE. A REVIEW OF e
OPERATING PROCEDURES WILL BE MADE TO DETERMINE IF A REVISION OR ADDITION CAN BE MADE TO ELIMINATE THE POSSIBILITY OF THIS SITUATION F e
RON RE-
,,, gURING. AT THIS TIME LOAD IS BEING REDUCED AT THE RATE OF 8 M.W.E.
e PER HOIR THIS 1.0AD DROP WIU. CONTINUE UNTIL EITHER THE UNIT TS SHUT DOWN OR THE BORON CONCENTRATION IS WITHIN LIMITS SHOWN IN FIGURE g
3.4 1 0F TECHNICAL SPECIFICATION W. P. WORDEN, SUPI.
g COMMONWEALTH EDISON DRESDEN NUCLEAR POWER STATION
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