ML20043A561
| ML20043A561 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 05/16/1990 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20043A543 | List: |
| References | |
| 50-461-90-09, 50-461-90-9, NUDOCS 9005220244 | |
| Download: ML20043A561 (1) | |
See also: IR 05000461/1990009
Text
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7:51 a.m.
"A" R0 commenced turnover to day shift "A" R0,
including panel walkdowns,
.,
8:00 a.m.
Extra day shift "B prime" R0 assigned to perform required
balance-of-plant equipnent lineups by LASS.
7:51 to
Both "A" R0s stopped in front of panel with bypass valve
,
8:30 a.m.
position indication and looked at and discussed items
of interest.
Bypass valves were not recognized as being
open.
~
8:00 to
"B prime" RO noted bypass valves open but did not recognize
8:30 a.m.
significance of this fact.
8:30 a.m.
Midnight shif t "A" RO relieved by day shif t "A" R0.
8:33 a.m.
Bypass valves are recognized as being open by "B" R0s
performing panel walkdowns as part of their shift
turnover.
8:35 a.m.
Generator load set is raised to 520 MWe by midnight
shift "A" R0.
8:36 a.m.
Bypass valves all fully closed.
Generator load has
increased to 300 MWe. SS directed that GETARS records be
checked to determine if control rods were withdrawn while
the bypass valves were open.
10:00 a.m.
GETARS records indicated that control rods were
withdrawn with bypass valves open.
Initial notification
of event was made by operations department to station
management and NPC.
4:00 p.m.
Critique conducted on the event by operations
department management.
A ril 12, 1990
J
1:00 to
Licensee station and corporate management met with
4:00 p.m.
HRC Region 111 managers for a routine meeting, at
which the NRC expressed concern over the event on
April 11.
April 13, 1990
7:34 p.m.
Licensee management directed that the unit be taken to
cold shutdown (Operational Condition 4).
9:42 p.m.
Generator was taken off-line.
tpril 14,1990
'
y
6:40 a.m.
Reactor was taken suocritical.
9003220244 900514
{DR
ADOCK 05000462
7
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