ML19319D008
| ML19319D008 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/25/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19319C998 | List: |
| References | |
| NUDOCS 8003040935 | |
| Download: ML19319D008 (2) | |
Text
_.
m GCEA'SEE7WR f~~ FIEF %F s
CONTROt etOCx:l
- 1. l
- l. l l
cPtcase Paiur nu. ncouiRco iNrOn.mT:x 1
6 Auf uctNsf NuuaER Yvre l FlL l ClR lP l 3 l l0l0l-l0l0l0l0l0l-l0l0]
l 4 l1 l1 l1 l 1l l ol 4l
,7 69 14 15 25 26 30 31 32
"'N NN occuff NUMBER EVENT CATE REPORf Catt cATEcoRY T
ECONT I -l l
IT I L'J lo i s l o I-l o.13 lo 12 I in i viil a Iv I, I lo I 7 i 2 I s 1717 7 8 57 58 59 60 61 68 69 74 75 E
EVENT DESCRIPTION gl In mode 1 operation, in the progress of venting the makeup tank to the waste gas low-
)
- I 7 89 g3 l pressure header, an unplanned radioactive gas release to the Auxiliary Building occurred j
1 l 7 89 i dundancy NA.
Venting was gl contrary to' Environmental Technical Specification 5.6.2.A. _
I 7 89 gl ceased and the Auxiliary Building was evacuated immediately. The supply air to the E
7 o9
@l Auxiliary Bldg. was re-established & ventilation resumad Jahen che mis m
~1 a n ra t co E *euT (LER 77-73E)
CoMaouEvT systiu cAuss CODE CODE COMPONENT CCCE SLPautR MANUFACTURER VOLATON E IM la l lEl lZ lZ lZ !Z lZ lz l y
lZl9l9lg l W
7 89 10 11 12 17 43 44 47 48 CAUSE DESCn:PTON
')
1 oe lThe cause of this event is unknown at this time and is being investizated bv eha 91 ne 7 89 i
{
gg l engineering staff.
x89
]88 I
,acury utTHoo oF High alar:n on 1WA 22 shutting off
$1ATUS
% POWER OTHER STATUS CISCOVERY DISC 5WAY tESCR'FIO71 lE l l1l0l0l l NA l
l^ l l Auxiliary Bldg. supply air fans.
1
~
7G 9
10 12 13 44 45 46 AMOUNT OF ACTMTV LoCATCN 08 RELEASE
@E EASE l 1.8 curies noble gas l lRalease to Auxiliarv Blde.
REL 5 C
{
i vent to ne w.
7 8 9
10 11 44 45 C
PERSONMEL EXPOSURES NUMBER TYPE DESCR@TCN 33 l 0l 0l 0l ]
l NA 7 89 11 12 13 E
PERSONNEL INJURIES NUMBER DESCRIPTON 101 ol al I
ni 1
0 7 89 11.1 2 OFFSITE CONSECUENCES NA Ql L
7 8 '1 LOSS OR OAMAGE TO FAC:UTY TYPE CESCR:PTON 1
1 MA 0
7 89 10 PUBUC!TY l
NA L-7 89 ADDITCNAL FACTORS s l This was a repetitive occurrence as reported by LER's77-49E & 77-61E ~
7 89 L
8003040f X SEE SUPPLEMENTARY INFORMATION ACHED.
- 1. P. Stewart (813) 866-4159 NAME:
PHONE:
l
~
seo eas.ar
.m
-m
~
SUPP1.EMENTARY INFORMATION
)
Report No.:
50-302/77-73E 4.
2.
Facility:
Crystal River Unit #3 3.
Raport Date:
25 July 1977 4.
,0ccurrence Date:
16 July 1977 5.
Identification of Occurrence:
Unplanned release of radioactive waste gas costrary to Environmental Technical Specification 5.6.2.A.
6.
Conditions Prior to Occurrence:
Mode 1 power operation.
7.
Description of Occurrence:
3 At 2017 while venting the makeup tank to the waste gas lov pressure header, an i
unplanned radioactive gas release to the Anrflf ary Building occurred. The maxi-mum instantaneous release rate at the peak cf the discharge profile was.0063%
i of the most restrictive limit set forth in Specification 2.4.2.A(1).
When the radiation alarms cleared,the supply air was re-established to the Auxiliary Build-ing and ventilation resumed.
S.
Designation of Apparent Cause:
i Unknown at this time.
i 9.
Analysis of occurrence:
The healch and safety of the plant and general public were not affected as the j
maximum instantaneous release rates were not exceeded.
10.
Cort active Action:
A concerted effort by plant enr' ag staff involving piping checks is underway to establish the cause, in ord'
, define necessary corrective action. As yet, i
no conclusion has beau reacher j
l 11.
Failure Data:
This was the third occurrence of an unplanned release originating from the waste gas system. See LER's 77-49-E dated 14 June 1977 and 77-61E dated 6 July 1977.
J g
i I
,. -,. -.