ML20084S283
| ML20084S283 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/19/1973 |
| From: | Worden W COMMONWEALTH EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20084S282 | List: |
| References | |
| NUDOCS 8306160436 | |
| Download: ML20084S283 (1) | |
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PMS MR BOYCE GRIER DIRECTOR DIV 0F COM?LI ANCE REGION 3 7
US ATOMIC ENERG Y COMMISSION 799 ROOSEVELI HD GLENELLYt1 ILL SU3 JECT DPR-25 DRESDEN NUCLEAR POWER STATION UNIT 3
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i THIS WILL CONFIRM A CONVHSATION WITH MR H DANCE OF YOUR 0FFICE CONCERNING HPCI ROOM TEMPERATURES SWITCHES OUT OF CALIBRAT10N.
WHILE CONDUCT ING REFUELING O UT AGE C AL IB RA110M, 15 0F THE 16 HPCI ROOM TEMPER ATURE SWITCHES WERE FOUND
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AB0VE THE TECHNIC AL SPECIFICATION LIMITS. THESE SWITCHES ARE' DEISGNED TO SENSE HIGH TEMPERATUHE IN THE HPCI ROOM IN THE EVENT O
n OF A PIPliiG BRAKE AND ISOLATE THE HPCI STEAM SUPPLY.
TABLE 3.2.1 0F THE TECHNICAL SPECIFICATION REQUIRES THAT THE S F. ? 2C 1 r RS f 9; TRIP SETTING BE LESS THAN OR EQUAL TO 200 DEGHEE FAHRENHEIT DURING CALIBRATION, 3 SWITCHES TRIPPED AT 202 DEGREES FAHRENHEIT ONE AT 203 DEGREES FAHRENHEIT I AT 20b DEGhEES FAHRENHEIT I AT 208 DEGREES FAHRENHEIT 3 AT 210 DEGREE 5 FAHRENHEIT AND'!
AT 212 DEGREES FAHRENHEIT 3 SWITCHES DID NOT TRIP eELOW 212 I)
DEGREES FAHRENHEIT THE MAXIMUM TEMPERATURE UTILIZED IN THE CAllBRATION PROCEDURE. ALL SWITCHES WRE RESET TO i
TRIP AT 190 TO 195 DEGREES FAHRENHEIT W P WORCEN SUPERINDENET CO MMNWE ALTil EDISON DRESDEN NUCLEAR P04ER STATION RURAL ROUTE 1 MORHIS ILL 1
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