ML20136C259
| ML20136C259 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/12/1979 |
| From: | METROPOLITAN EDISON CO. |
| To: | |
| References | |
| TM-0895, TM-895, NUDOCS 7909170696 | |
| Download: ML20136C259 (7) | |
Text
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? *, ) I Tha follcwing chronology.was dictated to'W..J. Bubbc) Marshall by ) HUGH MCGOVERN (CRO) at approximately 0300,' March 29,1979. A copy of the handwritten transcript is attached. p ~ ~ ~ .,c -Q t. . =.... '.. s.
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0700 Came in, had 'just declared site emergency. PER' was ' solid, steaming ~ ' through 2 circ water pumps running, both atmospheric dumps were lifted - as noise from MS relief valve speaker. c p 0715 Started 2nd set of cire water pumps, atmospheric dumps shut - both by-c passes were controlling header pressure. a 0730' Isolated B S/G closed MS-V4 4 7 4 15 (B). Lynn Wright was isolating feed at this time., p 0800 Had a prcblem with gland steam - attributed to Unit 1. aux boiler problems- ' started losing vacuum - isolated gland steam spill E spill bypass'. 0750 Stopped SF-P-1A isolated BWST receive line.. y 0900 started aux building and fuel handling building exhaust fans also started AH-E-4B (control room recirc). c ~ g 1100 Isolated HP-R-227 from Rx building and secured it. During the above time frame - E.P. injection was started and stopped several times - also RC-0 R-V2 was cycled to relieve PZR pressure. 13C-D-T had 0 pressure, N 225 F established leakage close but could not keep temperature down, level' in-dicator less than 70 and pumps did not-have suction press indicating the contents of RC-D-T had flashed. Rx building pressure increased when RC-RV-2 was cycled and at p 3.5 psi RB isolation and cooling was initiated, went once was defeated and opened isolations for NC 4 IC. Pressure decrease when RC-RV-2 was shut. But came back up as RC-R-V2 was cycled ~ . about 45 minutes to 60 minutes after 1st RB isolation received 2nd actua- ~ f tion on Rx building pressure - this was around 1200 or 1300 hrs. (- ; O _, f *{ ~
2'- . :,. ~ h..., s= 4 1400 Had's load of 2-32A 4 2-42A loss of radiation ar.ea monitors and a.n Rx ~ m..j. building pressure spike that.went off' scale en narrow i-inge meter - definite spike straight up,' straight back down -' had meter - definite ..... v. .:.. ~. . spike straigh't up, straight back down - had full Rx building (Spray,, _.y :. t _ :.. -: ~ ~.;.
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~ pumps 4 BS-VPS/ DH-V8's) isolation 'and cooling. Someone secured spray pdmps, shut BS-Vi's and DH-V's (Hugh did) and unisolated equipment for building. f V 1500 Took the panel - at time had bubbles in 'both hot legs with both Th e ' instruments pegged. PZR was solid. Were taking water from.BWST U A DH-VS A6B 4 MV-P-1B running continuously and MU-P-IC*as necessary to control MV.T-1 level. MV-V-16B 'was open and thruttled to 100 gym, MV-V17 4 MV - V18 were open, with max letdown 120 to 130.GPM. M'anaged to collapse bubble in A loop hotleg as evidenced by Th A loop decreasings to 5900F. When this happened tried to do the same thing to B loop by opening MV-V16C with MV-P-lC." This' didn't work '- Th in A loop went back up off scale and B, loop Th didn't change. PER heaters on at this time with RC-R-V2 open. Shut stopped MU-P-IC and shut MW-Y16C. About 10 minutes later Th A loop came back down again. PER level dropped to /./ 395. At (, this time, isolated RC-RV2. Bf shutting RC-V2. PER level started to drop again in about S minutes, and dropped rapidly to 150", MU-T-1 level - 'was decreasing also MU-P-1B 4 C were running MU-V-17 in auto and. full ~ open (setpoint 200") MU flow was 150 dPM (makeup to) MU-V16C throttled to 200 GPM. At 'this time PER heaters were de-energized and lifted RC-4 - - - V132 momentarily.. 1his stopped, decrease'and PZR level was_ established at', t / ". I 175". ~ ~ - x j g 1200 Filled SOK tank to about 1.0 ft. At this time "A" atmospheric dump was.... _ l - ~. 4 i 9 g . _ _.. _ _ _... __, 4 ~ l ~ -- r '
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