05000267/LER-1981-071, Forwards LER 81-071/03L-0.Detailed Event Analysis Encl

From kanterella
Jump to navigation Jump to search
Forwards LER 81-071/03L-0.Detailed Event Analysis Encl
ML20062L898
Person / Time
Site: Fort Saint Vrain Xcel Energy icon.png
Issue date: 12/08/1981
From: Warembourg D
PUBLIC SERVICE CO. OF COLORADO
To: Jay Collins
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20062L903 List:
References
P-81309, NUDOCS 8112160160
Download: ML20062L898 (4)
v • d • e


LER-2081-071, Forwards LER 81-071/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
2672081071R00 - NRC Website
v • d • e

text

__ . - - ._ _

,7 .

public servlee company oe conotmde VA 16805 Road 19 1/2, Platteville, Colorado '80651-9298 December 8, 1981 i

' ~

Fort St. Vrain 9 Unit No. 1 W[,., r ew, 1 P-81309 '

- 4,%// - s g

! s Mr. John T. Collins, Regional Administrator a -

eeG IS'9,,; Jg Region IV-Nuclear Regulatory Commission

/j-

'lu j 1;t _

[E/

- 611 Ryan Plaza Drive --

Suite 1000 Arlington, Texas 76011

Reference:

Facility Operating License

No. DPR '

Docket No. 50-267.

Dear Mr. Collins:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/81-071, Final, submitted per the requirements'of Technical

Specification AC 7.5.2(b)2.

Also, please find enclosed one copy of the Licensee Event Report for Reportable Occurrence Report No. 50-267/81-071.

1 Ve truly yours,- ,

f f Don Warembourg Manager, Nuclear Produ , on- ["

DW/cis Enclosure g]((,,[1 T

cc: Director, MIPC 'O~

\ DEC)11981 .

V \\'j)

L i

r i.

A

$#EUoligg Sg(,

P REPORT DATE: December 8.1981 REPORTABLE OCCURRENCE 81-071 ISSUE.0 OCCURRENCE DATE: November 8, 1981 Page l'of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION '

PUBLIC SERVICE COMPANY OF COLCRADO 16805 WELD COUNTY ROAD.19 1/2~

PLATTEVILLE, COLORADO 80651-9298 REPORT NO. 50-267/81-071/03-L-0 Final IDENTIFICATION OF, -

OCCURRENCE:

On November 8, 1981,*d'uring steady state power operation, the volume of liquid nitrogen in~'the liquid nitrogen storage tank was lower than ,.

the limit of 650 gallons specified by LCO 4.2.12. This is operation "

in a degraded mod'e' df'LC0 4.2.12 and is reportable per Fort St. Vrain' Technical Specificat'fon AC 7.5.2(b)2.

~ ~ -

EVENT '

DESCRIPTION: _

At 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> on November: 8; 1981, with the' plant operating at 100*'

power and 328 MWe, the volume- of liquid nitrogen in the l_iquid nitrogen storage . tank Was noted as being below the 659 gallen level limit of LCO 4.2.12. p -

A scheduled delJvery,f of iiqu'id nitrogen arrived on site at 0610 hours0.00706 days <br />0.169 hours <br />0.00101 weeks <br />2.32105e-4 months <br />, November 8, 1981.. By 0630 hours0.00729 days <br />0.175 hours <br />0.00104 weeks <br />2.39715e-4 months <br /> on November 8, 1981, an acceptable level in exc'ess of 'the 650 ga'llon limit had been restor'ed' <

as a result of off-loadin'y the liquid nitrogen into the liquid ,,

nitrogen storage tank, within/the 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> allowed by LCO,4.2.12.

a; .,

3 .;,

The lowest measured slevel' of liquid njtrogen in tiie st_o. rage tanE..; ,

during the period f rom '0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> to 0630 hours0.00729 days <br />0.175 hours <br />0.00104 weeks <br />2.39715e-4 months <br /> on h% nmber 8, 1981, " ' -

was 450 gallons. " ,' / '

s , .

)1 ,

The dewpoint moisture monitors and low t'emperature adsorber remained operable during this occurrence. W ,

/.,

- > L ,

- } ,:

CAUSE ,

DESCRIPTION: . 21 '

The simultaneous high use of liquid nitrogen atTfull power' operation, together with the late arrival of ~ a prescheduled liquid nitrogen delivery resulted in the lowering of the liq'uid nitrogen level beicw the 650 gallon limit of LCO 4.2.12. - -

as

~ C

. \- _, , :- r

^(_ '

REPORTABLE OCCURRENCE 81-071 ISSUE O

.Page 2 of:3 4

CORRECTIVE-ACTION:

- 'A ; scheduled . load of liquid. nitrogen was received. .Th'e delivery of-4'

' ~ ~ , '- the. liquid nitrogen to the system brought the-tank to .an acceptable

.l e ve l '.

?

.No.further corrective action'is anticipated.or required.

l l'

1.

k e

3 A

.e 1.

i g

.j. E

~

y +" .

my. ,

'.; W

, 4

-

  • 3. -

9 , 3

~-

-4 -

REPORTABLE OCCURRENCE 81-071

~O 7l/ h ISSUE 0.

Page 3 of 3 Q

?,. '

s hk .

d

"% +

1 1 97 " 'g " h -i -  % y

, 4  % 17 g s 3 ,-

5 .\

1 jfb

.l PrepgedBy: ///(-( Lf-Pa'ul A. Trar6p #

h Technical Services Technician

, , s' .-

- ' Revie',ed By: 4 '

- . __C arles Fuller Technical Services Engin Ping Supervisor

m. '

.. 1 ,

/

t s /

Reviewed By:

s

[/ //

w

, Statibn Mana)gerEdw1njQ/H1'l '~V

+

n, s t - (

Approved By: N8//v?#hff Y "' s - '

Don Wirembo6~g r J/' M ' '

s ,

Manager,Nuclea/rProduction

.. e Y -

4-

%e. 1, Y .-

g i w

w s, k

=z i "* %

_N y

- k

[ ~ %. t t

r i p'Jr+

e,

  1. $-

Retrieved from "https://kanterella.com/w/index.php?title=05000267/LER-1981-071,_Forwards_LER_81-071/03L-0.Detailed_Event_Analysis_Encl&oldid=2676490"