05000267/LER-1979-024-03, /03L-0:on 790804,on Three Occasions Between 790804-16,total Primary Coolant Oxidants Exceeded 10 Ppm W/Core Average Outlet Temp Greater than 1,200 F.Caused by Dryer Bypass Resulting in Water Ingress to Core

/03L-0:on 790804,on Three Occasions Between 790804-16,total Primary Coolant Oxidants Exceeded 10 Ppm W/Core Average Outlet Temp Greater than 1,200 F.Caused by Dryer Bypass Resulting in Water Ingress to Core

ML19253A578
Person / Time
Site:	Fort Saint Vrain
Issue date:	08/31/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19253A577	List: 05000267/LER-1979-024, Forwards LER 79-024/03L-0 05000267/LER-1979-024-03, /03L-0:on 790804,on Three Occasions Between 790804-16,total Primary Coolant Oxidants Exceeded 10 Ppm W/Core Average Outlet Temp Greater than 1,200 F.Caused by Dryer Bypass Resulting in Water Ingress to Core
References
LER-79-024-03L, LER-79-24-3L, NUDOCS 7909100359
Download: ML19253A578 (1)

LER-1979-024, /03L-0:on 790804,on Three Occasions Between 790804-16,total Primary Coolant Oxidants Exceeded 10 Ppm W/Core Average Outlet Temp Greater than 1,200 F.Caused by Dryer Bypass Resulting in Water Ingress to Core

Event date:
Report date:
2671979024R03 - NRC Website

text

.

(7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

lC l0 l F lS lV 1 l@l 0 l0 l-l 0 0 l0 l0 l0 l-l0 l0 @l4 l1 l1 l2 0 l@l l

l@

o i

7 8 9 LICENSEE CODE 14 15 LICENSE NLM8ER 25 26 LICENSE TYPE Jo

$7 CAT $8 CON'T ER$ l L gl 0 l 5 l 0 l 0 l0 l 2 l 6 l 7 @l 0} 8i 0l 4l 7l 9)@l0 l 8 13 l1 l 7 l9 @

0 1

7 8

60 61 COCKET NUM8ER 68 69 EVENT DATE 74 75 HEPoRT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEOUENCES h l Cn three occasions during the period August 4, 19 79, through August 16, 1979, total I

o 2

primary coolant oxidants (sum of water, carbon monoxide, and carbon dioxide) ex-l o

3 l ceeded 10 ppm with core average outlet temperature greater than 1,200*F.

This con-o 4

- - ; stitutes operation under a degraded mode permitted by LCO 4.2.10 and is reportable l

g 3

per Technical Specification AC 7.5.2(b)2.

l o

6 I

067 l o

a l

80 7

8 9 SYSTEM

CAUSE

CAUSE COMP.

V ALV E CODE CODE SU8 CODE COMPONENT CCDE SL8C00E SU8 CODE

@ lZl@

l C l B ]@ y@ lZ ]@ l Zl Zl Zl Z Z l Z l@

Z o

9 8

9 10 11 12 13 18 19 20 SEOVENTI AL OCCURRENCE REPORT R EVISION LER RO EVENT YE AR REPORT NO.

CODE TYPE NO.

[___]

l 0l 2l 4l l/l 0l3l lL l Hj 0l

@ AE l 7l 9l

_,21 22 23 24 26 27 28 29 30 31 32 ACTIO N FUTURE EFFECT SHUTOOWN ATTACHMENT NP R O-4 PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOO HOURS SUBMITT ED FORMdu8.

SUPPLI E R MANUFACTURER lx l@l2 l@

l Zl@

Zl@

01010101 i Yl@

l N l@

l2@

lZ ZlZlZl@

33 34 25 36 3/

40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1

o l L CO 4. 2.10 p rimarv coolant imp uri tv limits vere exceeded durine drvine out op era ti ons I i

1 l following the first refueling.

A previous drver bvoass resultine in water imec &

l the core and breakthrough of the curification train contributed to increased oxidant 7

31 l levels observed.

l i

I 3 i4 l

80 7

8 9 5A S

% POW E R OTHER STATUS 015 0 RY O'SCOVERY DESCRIPTION l C l@ bl 4l 3l@l N/A l

lA l@l Operator Observation l

s ACTIVITY CO TENT OP RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE AELEASE@D Z l@

N/A l N/A l

lZl 1

6 7

d 9 10 tt 44 45 80

• ERSONNEL EXPOSURES NUMBER TvoE OESCRIP?lCN l 0 l 0 l 0 l@l Z l@l N/A l

)

7

.ERSONNE t,Nau' dies OESCRtPriON@

NuMsER l0l0l0l@l N/A l

3 y

3 9 11 12 30 LOSS OF OR O AM AGE TO F ACILITY TYPE

DESCRIPTION

lZl@l N/A l

1 9

7 tl 3

?O 80

SSNE[@lOESCRtPTION 7 hQQ y 00 M-y l

N/A i

liisiiiiiiiil}

o S.

50,

p 8,

,0 n /g// h. e#

J. W.

Gahm (303) 785-2253 0

NAME CF PAEDARER ;

PHONE:

j