ML20085L622
| ML20085L622 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 05/07/1975 |
| From: | Brey H PUBLIC SERVICE CO. OF COLORADO |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20085L618 | List: |
| References | |
| RO-50-267-75-7, NUDOCS 8311020136 | |
| Download: ML20085L622 (6) | |
Text
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publie Service Conuptiny W Oicnd!D
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P. O. Itox 361, Platteville, Colorado 80651 i
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May 7, 1975 of Mr. E. Morris floward, Director Nucicar Regulatory Commisalon Region IV Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 REF:
Facility Operating License No. DPR-34 Docket No. 50-267
Dear Mr. Iloward:
Enclosed please find a copy of Unusual Event Report No. 50-267/75/7, preliminary, and Unusual Event Report No. 50-267/75/8, submitted per the requirements of the Technical Specifications.
Very truly yours.
'.; f 0; r n f'i.'.
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- 11. Larry B' rey Superintendent-Operations Fort St. VraIn Nuclear Generating Station I
ilLil:11 cc:
Mr. Angelo Giambusso b
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i<EPOI:T DATE:
Play 2,1975 UNUSUAL EVI:NT 19,75 9
OCCU!UIENCE DATE:
April 28, 1
FORT ST. VRAIN NUCLEAR CENERATING STATION PUllLIC SERVICE COMPANY OF C01.ORADO l
P. O. BOX 361 PLATTEVILLE, COI.0RADO 80651 r.
f-REPORT No. 50-267/75/7 1
1 I
IDENTIFICATION OF J
OCCURRENCE:
l Temporary cables from the auxiliary cicetrical equipment cabinets to the temporary instrumentation and test equipment were not segregated from the-permanent cables according to specification 1-N-2.
Color coding on the temporary cables was not consistent with the scheme used in the permanent installation.
8 CONDITIONS PRIOR
^
TO OCCURRENCE:
Steady State Power
_ Routine Shutdown llot Shutdown Routine Load Change Cold Shutdown Other (specify)
Refueling Shutdown' X
Routine Startup The major plant paraucters it the time of. t.bc. event' wcre as fc310ws:
Power Rtr.
16.47-MWth t
Elect. _,
0-
. -MWe Secondcry Coolput. Prennure __
1216-pnig 4
Temperat u ro 306
- F.
6 F.l ov. -
. l.209 x 10 If/hr.
-Primary C il a nt -
_Piennu e 411 -..
. p o i ',
i t
1 Terr pe r.t t u re,,_ 270,,_ _._
"l~ Core - 1iilet
- 1.',.0.
~*F Core Odlet.
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U Page 2 DESCRIPTION OF OCCUR.RENCl::
Inspection revealed that some of the temporary cables to the temporary inst.rumentat ion and tent equip nent in the auxiliary electrical equipment room were not segregated from the permanent cablen above the auxiliary electrical equipment cabinets, either by physical r.eparation or by fire resintant zipper tub'ing according to T.pecification 1-N-2.
APPARENT CAUSE OF OCCURRENCE:
Design Unusual Service Cond.
Including Environ.
Manufacture Component Failure X
Installation /Const.
Other (specify)
Operator Procedure ANALYSIS OF OCCUltitENCE:
Adequate ceparation and segregation should exist between the temporary and permanent cables, according to Specification 1-N-2.
CORRECTIVE ACTION:
General Atomic Work Authorization No. 99F1849 han been issued to correct color coding on t.he temporary cables and to zipper tube enbles that do not. neet segremt ion criteria according, to Spec i f J ent ion 3 N-2.. The work will be innpcered af ter the work authori: atini. h.u: baco conpleted.
Fall.Ul:R DATA /
S1:lll.AR kEPolill;n OCCit1RI.NCES:
No failuren have occurred at Fort St. Vrain due to( lectrical :wp,cega t ion and r.cparation.
- lullar occurrene s wre report tJ in Unoruni 1
- vent 1:o.
50-267/74/2 m d SN!o7/75/1.
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Page 3 Pl!OG11Att!ATIC I!! PACT:
None CODE I!! PACT:
Nonc i
Subaltted:
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/j.nen 11. Reader Vite Engincer Fort St. Vrain Nuclear Cencrating Station y
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,1,g Cte.e Approved:
Fr[dericE.
Swart Superintendent Nucicar Production Public Service Company of Colorado i
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REPORT DATE:
May 2. 1975 UNilSUAL EVENT OCCURRENCE DATE:
April 28,1975 FORT ST. VRA1N NUCLEAR GENERATING STATION PUBLIC SERVICE COMPAm* OF COLORADO P. O. BOX 361 PLATTEVILLE, COLORADO 80651 REPORT No. 50-267/75/8 Preliminary IDENTITICATION OF OCCURRENCE:
Adequate fire stops in the vertical.cabicuays between floors in the reactor building, in the horizontal cabic trays and con!cits from the auxiliary electrical equipment room in the vertical cable ducts above the stand-by generator rooms were not installed, per drawings issued and per FSAR, Appendix C.3-1.
CONDITIONS PRIOR TO OCCURRENCE:
Steady State Power-Routino Shutdown Not. Shutdown Routine Load Change, Cold Shutdown Other-(specify)
_ Refucling Shutdown ~
X.'
Routine Startup.
The major ploat parametern at the~ time of. the event. were as follows:
Power Rtr.
16.47 MWth Elect.-
0-MWe Secondary Coolant-
. Pressure-1216 pain Temperature-3061
- F o
Flou' 1.209d10..
.f/hr.
6 Primary Coolant _
.Premurd 411
, _ _ __ p n l g~-
Temperature -
~ 270
- F Core' Inlet
'F Core-Out141
' _3 5,0,i,,,
4 riou.
. 31 x 10*
- #/hr.-
r h
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=,j
fx (x
Par,e twe, DESCRIPTION OF OCCUnitt.NCI::
Incpaction revealed that adequate fire stops in the vertical cableways between floors in the reactor building,, in the horizontal cable trays, and conduits f rom the auxiliary cicet rical equipment room and in the vertical cable ducts above the stand-by generator roo;as were not installed per drawings issued.
APPARENT CAUSE OF OCCURRENCE:
Design Unusual Service Cend.
Including Envfron.
}!anufacture Cotr.ponent Fa 11ure X
Installation /Const.
Other (specify)
Operator Procedure ANALYSIS OF OCCURRENCE:
Adequate fire stops should be installed to prevent the spread of fire and smoke and uinimize the potential effects of such events to safety.
I CORRECTIVE ACTION:
General Atomic Work Authorization No. 92F185? has been issued to install fire stops as per details on drawings issued and installation will be inspected.
FAII.URE DATA /
Sl!!ITAR REPORTED OCCURRENC_ES:.
None Pl:0CRA?1:IATlC 11IPACT:
Nane conP. T!-:PA_CT.:
Nanc 0.;.,~,. D ' ',A'l [0f l~ -i,._,
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f Subnit t ed :
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~ Approved:
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[ Sit e 1:ur.ineer
):ime. 11. Rem!cr i rede r i-E.
Swa r t Suptrin en.!ent 1:aeliat Praductten Port St. Vrain.Iuele;a l'ob i i c Service Co' pny Generat in}, StatJon
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