ML17252A998
| ML17252A998 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/19/1973 |
| From: | Worden W Commonwealth Edison Co |
| To: | Anthony Giambusso US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17252A998 (1) | |
Text
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R B TWX NO 8 6 1 SAEC HQS GTWN TLXA1B9 WAB216Cl656)Cl-02474gC078)PD 0~/19/73 1653 ICS.IPMVEIB MVN ZCZC 02087 MORRIS ILL 166 03-19 247P CST PMS MR A GIAMBUSSO.
DEPUTY DIRECTOR FOR REACTOR PROJECT 50-249 DIRECTORATE OF* LICENSING US ATOMIC ENERGY COMMISSION
- WASHDC, SUBJECT DPR-25.DRESDEN NUCLEA~ POWER STATION UNIT3 THIS WILL CONFIRM A CONVRSATION WITH MR H DANCE OF YOUR OFFICE CONCERNING*HPCI ROOM TEMPERATURES SWITC8ES OUT OF CALI BRAT ION.
WHILE CONDUCTING REFUELING OUTAGE CALIBRATION, 13 OF THE 16 HPCI ROOM TEMPERATURE SWITCHES WERE FOUND ABOVE THE TECHNICAL SPECIFICATION LIMITS. THESE SWITCHES ARE DEISGNEQ TO $ENSE HIGH TEMPERATURE IN THE.HPtI ROOM IN THE EVENT OF A PIPDrG BRAKE ~ND ISOLATE THE HPCI STEAM SUPPLY.
TAB~E 3.2.1 OF THE ftCHNICAL SPECIFICATION REQUIRES THAT THE TRIP SETTING BE LESS THAN OR EQUAL TO 200 DEGREE FAHRENHEIT DURING
'CALIBRATION, *3 SWITCHES TRIPPED.AT,202 DEG~EES FAHRENHEIT ONE AT 203 DEGREES FAHRENHEIT 1 AT 206 DEGREES FAHRENHEit.
1 AT 208 DEGREES.FAHRENHEIT 3 AT 210 DEGREES FAHRENHEIT AND 1 AT 212 DEGREES FAHRENHEIT 3 SWITCHES DID NOT TRIP BELOW ~12 D DEGREES FAHRENHEIT ~~E MAXIMUM.TEMPE~ATURE UTILIZED IN THE CALIBRATION PROCEDURE *. ALL SWitCHES WRE RESET TO, TRIP AT 190 TO 195 DEGREES FAHRENHEIT W P WORDEN SUPERINDENET COMMONWEALTH EDISON DRESDEN NUCLEAR POWER STATION RURAL ROUTE 1 MORRIS ILL I
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