ML20084S283

Telecopy Ro:On 730319,while Conducting Refueling Outage calibr,13 of 16 HPCI Room Temp Switches Found Above Tech Spec Limits.Cause Not Stated.All Switches Reset

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: ML20084S278 ML20084S283
References
NUDOCS 8306160436
Download: ML20084S283 (1)

Text

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Z CZC 0?.088 MORR IS ILL 166 034 & 247P CST 3 l PMS MR BOYCE GRIER DIRECTOR DIV 0F COM?LI ANCE REGION 3 7 ,f ,

US ATOMIC ENERG Y COMMISSION 799 ROOSEVELI HD ,

GLENELLYt1 ILL SU3 JECT DPR-25 DRESDEN NUCLEAR POWER STATION UNIT 3 /

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 AB0VE THE TECHNIC AL SPECIFICATION LIMITS. THESE SWITCHES ARE' .f f 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

8306160436 730330 PDN ADDCH 0 5 0 0 0 ? 4 c; PDR u ,. s,m