ML17252B013
| ML17252B013 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/20/1972 |
| From: | Worden W Commonwealth Edison Co |
| To: | Anthony Giambusso US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17252B013 (1) | |
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TLXA289 WAE197<2043JC1~032231C325002>PD 11/20/72 2039
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..... J 2CZC 00222 TOVE MORRIS ILL 120 11-20 315P_CST
~i R'1S MR A GIAMBUSSO DEPUTY DIRECTOR OF REACTIV~ PROJECTS ~~
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DIRECTOR APE OF
~ICENSING WUX ~ACHINE.
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- N L6 ATOMICH ENERGY COMMISSION W\\SH I NG TON DC M ~.*
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.9.J. BJEC T :.OP R. -2 5 DRESDEN NUCLEAR POWER' STAT I ON U_ N 1 T 3 n1-.
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lHIS WILL CONF !RM A CONVERSATION wi TH MR ;i DANCE OF YOUR!
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I A~. 1100 HOURS THIS DATE C~N<;:ERNING REACT,ORS LOW PRESSURE _sw1 TC. ~
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~ING OUT.OF ~ALIBERATION~ ON
~l/L9/72 WHlLE UNIT i-WAS SHUT DOWN, I
AtAL)BERATION WAS MADE ON MAIN STEAM LINE LOW PRESSURE-SWITCHES.
CABLE 3.2.1 OF THE TECHNICAL SPE.CIFICATIONS STATE THAT THE TRIP
~VEL SETTING ON THESE SWITCHES SHOULD BE EQUAL TO OR GREATER lHAN 8 50 PS I G ** ALL FOUR PRESSURE SW I TC HES HAD TR IP SETTINGS BELOW 850 PSIG. PRESSURE SWITCHES 3-261-30A AND 308 HAD SETTING
. F 847 AND 848 PSIG *. PRESSURE SWITCHES 3-261-30C *AND 300
~D.SETTINGS OF 849 AND 848 PSIG. IN ORDER TO ELIMINATE.THIS PROBLEM*
I IN THE FUTURE.THE "AS LEFT" CALIBERATION SETTING ON THESE
~ITCHES HAS BEEN CHA~GED F~OM 85~ PLUS OR Ml~US PSIG Pl,.US OR i"11NUS 4PSIG.
W P WORDEN
~UPERINTENDENT COMMONWEALTH EDISON ORESD~N ~UCLEAR POWERSTATIQN RR 1 MORRIS ILLINOIS 430A 11-21-72
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