ML19329B591
| ML19329B591 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 06/09/1977 |
| From: | Batch S, Lingenfelter J TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML19329B533 | List: |
| References | |
| NUDOCS 8002050724 | |
| Download: ML19329B591 (2) | |
Text
,;1LGa x3 ~ -.
1**:= X G =~~-
- - - O *L
- '= - ^ ^1 ' %
~M
.A w.o-c' LICENSEE EVENT REPORT CONinot stocs l,_.l., j l I l_I e
c
f.'a%' '
.C
~st~.,-n.
#.~c"
' *J,'.'
@,lOlH IDIBlSl1]
l,0 j OJ - J 010 l A's D lF l -10131 l 4ll l [l l:
ir i 1J i
i 0
u m
....oc.. m: :re.m 0 C....u
.,....,a..
.C.O.,o...
Og 3 4 l6 i 6,0; 1,7 7 1 i 0 con'T g
1S 10 16 1;5 ;7 1
1 1
tytNT Cf SCptP TION g ;On May 31, 1977, at 1825 hours0.0211 days <br />0.507 hours <br />0.00302 weeks <br />6.944125e-4 months <br /> RIM 2004 in SFAS Channel I wds turned offj r av w
gl so construction could. work on it.
(as per TS 3.2.2.1 Table d.3-3, Action 9 7
89 w
g [#9). The violation occurred when on June 1, 1977 at 1237 hours0.0143 days <br />0.344 hours <br />0.00205 weeks <br />4.706785e-4 months <br />, a g
i e9 w
g : Control Room Operator reset t'
- stable for containment radiation.in i
7 89 2C
@ LSFAS Channel 1.
QP-32-77-4) tNs LsNL
't s's u[rIu"s ac"vEar e C f5=.en=s **
- C otw su veos a t tom E!z i z.I W iziziz tz Lziz1 LO IZ l Z IZ I Z I W
7 89 10 41 12 13 4J 4e 47
+4 CAUSF ot1CR' piton
.g l The module was incorrectly reset due to a personnel error.
/
9g l
W
-l l
l r^s si 7-89 40 St S
f of eet e S'af ug S o av o*5Covt av DESCnsPf ecae 7 0 9
so 32 32
++
et e.
v0 os $ a af 5
St suovms or ACf *vetv LOCainoae or a(LCast
- 3
(_zj LZj INA I
l NZ
)
B S
to et
+4 eb M
7tn10NNEL DPO5umtS av=we a Svet
- Teore l1010161 Qlcf.S$A l
[
a is n
i.
ia a
P(R$oNNE L INJustit5
=vweCm nescenessom
- 8. 0 10 f,Of i.,NA f
1 a
Of FSIf t con $tCt. t NCES
[ NA I
al 9 d
- LOSS oM Dawact 10 8 ACIL'f v tvrt ot t c e ** tiom eh \\e
~
PUSLICity 3 l NA
]
e,
.3 acostioNat s acroas l NA
]
e so V) 3,.1
~
. Jacque Lingenfelter/Stan Batch
-(4197 ' 259-5000, Ext. 251 l
~ s o 0 2 0 5 07%.
A TOLEDO EDISCN COMPANY k
DAVIS-BESSE UNIT ONE NUCLEAR PO*JER STATION SUPPLEMENTAL INFORMATION FOR LER NP-32-77-4 DATE OF EVENT: June 1, 1977 FACILITY: Davis-Besse Unit 1 CONDITIONS PRIOR TO OCCURRENCE: Plant in Mode 5.
Power:
(MWI) -0 (MWE) -0 Identification of Occurrence: Containment Radiation Indicator Monitor (RIM) 2004 in Safety Features Actuation System (SFAS) Channel 1 was tripped as per Technical Specification Action r19 of Table 3.3-3.
The bistable for containment radiscion in SFAS Channel I was inadvertently reset the following day.
Description of Occurrenes: On May 31,1977, at 1825 hours0.0211 days <br />0.507 hours <br />0.00302 weeks <br />6.944125e-4 months <br />, RIM 2004 in SFAS Channel 1 was turned off so construction could work on it (as per Technical Speci-
~
fication 3.2.2.1, Table 3.3-3 Action 9).
The violation occurred when on June 1, 1977, at 1237 hours0.0143 days <br />0.344 hours <br />0.00205 weeks <br />4.706785e-4 months <br />, a Control Room Operator reset the bistable for containment radiation in SEAS Channel 1.
On June 2, 1977 at 0845 hours0.00978 days <br />0.235 hours <br />0.0014 weeks <br />3.215225e-4 months <br />, the condition was discovered.
'~'N s,,/
Designaticn of Apparent Cause of Occurrence: The modul,e was incorrectly reset due to a personnel error.
Analysis of Occurrence:
Since three out of the four SFAS radiation monitors were still operable, the health and safety of the public or station personnel was not threatened.
Corrective Action: On June 2.1977, at 0845 hours0.00978 days <br />0.235 hours <br />0.0014 weeks <br />3.215225e-4 months <br />, the condition was discovered, the Shift Foreman was notified and at 0850 hours0.00984 days <br />0.236 hours <br />0.00141 weeks <br />3.23425e-4 months <br />, the bistable was again tripped and tagged to preclude recurrence.
Failure Data: No previous similar events have occurred.
j V
l I
w w~-