ML19308D239
| ML19308D239 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/29/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19308D229 | List: |
| References | |
| NUDOCS 8002270694 | |
| Download: ML19308D239 (2) | |
Text
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Lt V L.l V U L L L V Ll'd I a i s.1 se n a (O
(
U CONTPOL DLOCKa l
l l
I l
l (PLEAGC PntNT ALL RtQUtRtO INFCnt.1 AT:
4
-l 1
6 N
E LICENSE NUMCtn Y E I ST l Fl L l Cl R l P l 3 l l0 l0 l-l0 l 0 l 0 l 0 l 0 l-l 0 l 0 l l4l1 l] l1 l 1l l 0l 3l i
7 UD 14 15 25 26 30 31 32 tvp[ e$o'v7"g U
EVENT oA[E REPcAT oAft CATEcony ocCxET NUMOEn E CONT I l -j Lt_J lt i lo is lo I-10.12 In 12 I I 01610 I 71717 i I0161218l7I 7 0 57 60 59 60 61 68 69 74 7S EVENT OESCAIPTION gl In Mode 1 operation the inoperability of RMA-6 vacuum pump on three occasions, due to y o9 g l thermal overload, caused the loss of two of the three RCS leakage detection systems 7 09 mg l contrary to Technical Specification 3.4.6.1.
Redundant sampling was available and 7 09 Ql utilized. This occurrence was repetitive. A temporary cooling fan has been used 7 09
@l pending a permanent solution.
(LER 77-57) 7 89 paug
- So'E Cc"OE CoMPoNTNT CODE R
Cr A
vot.Afon g l Bl Bl lBl l PJ Ul Ml Pl Xl Xl lAl lTl3l0l0[
]
7 89 10 11 12 17 43 44 47 48 CAUSE CESCA:PTION
')
l The cause 'of this occurrence has been determined to be a thermal condition causing the oe 7 89 g l tripping of the vacuum pump. A temporary auxiliary cooling fan is being utilized pend-7 89
'] l ing resolutien by Production Engineering.
si s
% PoWEA OTHER Status sCo EAY 03CcVEHY CESCAPfCN lEl l 1l 0l 0l l NA l
lAl l
NA 1
70 9
10 12 13 44 45 46 ELISEl l
l ctEYS AMOUNT OF Acievtfy LoCATCN CF RELEASE oF W
1 NA NA 7 8 9
10 11 44 45 PERSONNEL EXPOSUAES NUMBEA TYPE oESCAFTON 13 I 0l 0l 0l Wl NA 7 89 11 12 13 PERSONNEL INJUAIES NUMBER DESCAtPTCN E lni nl,l l
NA 7
89"
'11 12 OFFSITE CONSEQUENCES NA l
7 09 LOSS On OAMAGE TO FAC:LITY TYPE CESCA'PTON
]
l NA 1
7 80 10 PUDLCTY gl NA 7 89
[N ADDITIONAL FACTOAS (s_y]g gl See attached Supplementary Infornation.
io I n/
8 0 02 270 6ppr tJ. P. Stewart,
PHONE (All) 866-4159 NAMF.
Suppismentary Informat.
4.-
Report No.:
50-302/77-57
)
s_s'.
Facility:
Crystal River Unit #3 s
3.
Report Date:
29 June 1977 4.
Occurrence Date:
7 & 9 June 1977 5.
Identifica' tion of occurrence:
Inoperability of two of the three Reactor Coolant System leakage detection systems contrary' to. Technical Specification 3.4.6.1.
6.
Conditions Prior to Occurrence:
Mode 1 Power Operation.
7.
Description of Occurrence:
At 1310 7 June 1977, 0145 9 June 1977, and 1125 9 June 1977 the vacuum pump for th -
gaseous and iodine leak detection radiation monitor channel RM-66 tripped, rendering the monitor inoperable. In all three occurrences the action statement was entered i
and the channel restored operable within the six hour time li'mit.
The first occur-rence was due to a thermal overload trip. The trip was reset and the pump started The second occurr' nce was due to a blown fuse in the pump control circuit.
normally.
e The fuse was renewed and an auxiliary cooling fan was temporarily installed using the control circuit of the pump as a power source. The third occurrence was also due to a blown control circuit fuse. The fuse was renewed and the power source for w s
)
the auxiliary cooling fan was changed to an independent power source. The pump has d
not malfunctioned again to this date.
8.
Designation of Apparent Cause:
l The cause of these occurrences has been determined to be a thermal condition causing the carbon vane pump to overload and trip.
9.'
Analysis of Occurrence:
There were no adverse sefety conditions to the plant or general public as redundant sampling systems were available and a temporary pump was available for this monitor.
i 10.
Corrective Action:
l I
A Rcquest for Engineering Information (REI) has been submitted to evaluate and recommend a permanent solution to this problem.
11.
Failure Data:
This occurrence is repetiti e as discussed above.
._