ML20085L798
| ML20085L798 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/05/1971 |
| From: | Hoyt H COMMONWEALTH EDISON CO. |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20085L644 | List: |
| References | |
| NUDOCS 8311020483 | |
| Download: ML20085L798 (1) | |
Text
'
g C
l
~
y'/* '{A- '
s p,*
l l
Y@iHRllW1D
[
i, t
t 8
USAEC HGS GTwN 5 M 1105 10e Wu WSH U S. Als a, tp;gg g3, i W) UHT i
TLaadd9 L20) DEAL 96 WA k VEA366 JG LCNG PCU 7 EATRA TDVE MORRIS ILL S $49P CDT OR P A NORRis DIRECTOR DIVN OF REACTOR LICENSIN'G US ATOMIC ENERGY COMM WASHDC 20545 THIS IS 70 CONFIRM TELEPHONE CCNVERS ATION AT 1720 HOURS ON AUGUST 5.
1971 WITH MR RON COOK REGION 3 CoxPLAINT CONCERNIN3 APPARENT FAILURE OF SCRAH RELAY 590-le5A TC DROP OUT WHEN DEENERCIEED THIS IS AN ABNORHAL OCCURANCE AND IS REPCRTED UNDER SECTION i
6 6. A.3 0F DPR-25 TECHNIC AL SPECIFIC ATICNS. AT APPROXIMATELY 1730 HOURS ON AUGUST 41978 A SURVE! LANCE CLCSURE TEST OF THE fMIN STEAM ISCLATION VALV'ES (MSIV) WAS BEING CONOUCTCD. WHEN VALVES 203=lB WAS CLOSED SQLENDID GROUPS 2 AND 3 IN SAFET7 SYSTEMS CHANNEL A DEENERGIEED THE VALVE WAS OPENED AND THE SQLENCIDS WERE REENER0!ECO. VISUAL CSSERVATION OF THE SCRAM
- g RELAYS REVEALED NO APPARENT AdNCRNAILTY. THE CLOSURE CPERATION WAS REPEATED ONCE WITH THE SAME RESULTS. THE CPERATION WAS AGAIN REPEATED WITH THE RELAYS UN3ER CBSERVATION AND THE INCIDENT DID NOT REPEAT ITSELF ALL SCRAM RE AYS HAVE BEEN EXCERISED AND OPERATE NORMALLY..THE RELAYS WILL BE TESTED CNCE PER SHIFT UNTIL THE SUSPECT RELAY CAN,BE REPLACED AND THORCUCHLY EXAMINED tr /AILURE CCCURS ACA!N BEFORE REPLACEMENT A TRIP WILL 8: PLACEO IN THAT SUW SYSTEM UNTIL TME RELAY IS REPLACEO. INFOR% TION WILL FULLOW IN ACCORDAh.CE WITH SECTION 6.e.b.3 Or OPR-25 HM H0YT SUPERINTENDENT DRESDEN NUCLEAR POWER STATION RURAL ROUTE I HORRIS ILLINCIS 69450.'
{l/l,/7/
.I?
kgj,: ;
f le ED7 gg "9
l
,,g l
x.
f'.
~
USAEC HCS GTWN gT g102%,%
,.1
,[
s e v 1
COPY SENT REGION L
..