ML19256C001
| ML19256C001 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/12/1979 |
| From: | Traviesodiaz SHAW, PITTMAN, POTTS & TROWBRIDGE |
| To: | Frampton G NRC - NRC THREE MILE ISLAND TASK FORCE |
| References | |
| TASK-TF, TASK-TMR 790917, NUDOCS 7910030416 | |
| Download: ML19256C001 (3) | |
Text
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JAME S TMOM AS LENMART September 17, 1979 George Frampton, Esquire NRC/TMI Special Inquiry Group Nuclear Regulatory Commission Washington, D. C.
20555
Dear George:
(
At the meeting held on September 5, 1979, in Camp Hill, Pennsylvania, between representatives of Essex Corporation ("Essex") and Metropolitan Edison Company
(" Met-Ed") operating personnel, the Met-Ed employees were given copies of an eleven-page drawing prepared by Essex and depicting in columnar form the actions of Met-Ed operating personnel during the first one hundred and forty minutes of the accident at Three Mile Island Unit 2.
The Met-Ed employees at the September 5, 1979 meeting were asked to identify any gross errors they detected in the drawing.
I have received the following corrections to the Essex drawing; please note that the list may not be exhaustive.
/> "Fau s t" column : At 00:14 change " Notices noise in vib. & LP monitor" to
'g,'
" verifies s/g levels coming down on start-up range; verificsmain feed pumps
,,' t tripped off".
j k,
.J
,, ( [
At 00:41 add: " notes turbine bypass valves opening" after " notes gov.
- i valve closed".
At 00:58 add: " checks electrical buses of normal line up; makes decision to leave mn 6 fw pumps turning gear motors off".
At 1:00 after " notes 10 in. level on sg A&B" add: makes announcement that generators are not being fed, could be dry; takes manual control of EP-Vll Eailey stations and tries to throttle; waits to see if there is any change.
19 0 M
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SHAW, PITTMAN, POTTS & TROWBRIDGE Ceorge Frampton, Esquire September 17, 1979 Page 2 At 2:28 insert: " notes T ve OC 570 to 580 and increasing; throttles open on a
EF-Vil; vaits to see if any effect; still dual indication on EF-Vil's; OTSG pressure oscillating around 1000 #; checks s/g down comer temp., seems to be same as Tave; looks at NI's, o.k. but hard to insure decreasing trend; watches chart record".
At 4:38 insert: " throttle open more on EF-Vll A&B".
At 5:15 delete: " points hotwell level off-scale to Zewe".
At 6:58 delete,: " attempts to open COV 12 polisher bypass valve".
At 19:00 add: " checks on hotwell, increased off-scale high; secures heater drain pumps; gives out instructions to restore reject line up to normal; checks locally on hotwe1.1 level; insures main turbine goes or jacking gear; places main feed pumps and main turbine jacking motor controls to auto".
At 36:00 (time not certain) insert: " secures both feedwater heater drain pumps; secures four out of six cw pumps to get atmospheric valves to take control of s/g pressure; manually opens up en Bailey controllers due to reduced capacity of atmospheric valves; place all ICS stations in shutdown lineup except for station being used".
At 75:00 (time not certain) insert: " checks over reactor trip and main steam line break procedures; isolates B steam generator".
At 105:00 insert: " notes increase on NI's; unisolates B s/g to feed it up more; attempts to start RCP's, one started".
At 112:00 change: "using turb. byp. valve" to "using EF-VilA".
At 115:00 insert: " talks of increase on NI's and restart of RCP's; checks over secondary panel".
"Zewe" column : At 00:08 change: " announces reactor trip" to " announces turbine trip and reactor trip".
At 1:00 delete: " requests Unit 1 shift foreman to call sta, mgr.".
At 1:40 insert: " call Unit 1 SS to assist in Unit 2".
At 3:00 insert: "& control 7zr level" after " tells F.S. to monitor pressure".
At 5:20 delete: " attempts tu start cond, boost 2B trips again".
At 15:00 change: "goes to aux. bldg..." to "goes to turb. b1dg.".
1917 311
F SHAW, PI'TTMAN, POTTS & TROWERIDGE George Frampton, Esquire September 17, 1979 Page 3 "Scheinann" column: At 00:00 insert: "in turbine building basement trying to clear clogged resin transfer line at polishers".
At 00:09 insert: "en route to control root".
At 3:30 insert: "still monitoring system pressure and trying to contrcl pressurizer level by adjusting letdown flow".
At 18:00 insert: "still trying to control pressurizer level and observing system pressure".
At 36:00 insert: "still at pressurizer control station".
At 54:00 insert: "still at pressurizer control station".
At 72:00 insert: "still at pressurizer control station".
At 90:00 insert: "still at pressurizer control station".
At 138:00 insert: " closed emov block valve at suggestion of Brian Mehler".
Sincerely, lk Matias F. Travieso-Diaz MFTD:ry 1917 312 O