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=Text=
=Text=
{{#Wiki_filter:3              -          _  ,        .m ___ .                                    . . -    ,._, .                        . _ _ _ .                  .
{{#Wiki_filter:3              -          _  ,        .m ___ .                                    . . -    ,._, .                        . _ _ _ .                  .
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i                                                                                                                                                                                              l d
:                                                                      public sentee company oe cenerses 16805 ROAD 19%
:                                                                      public sentee company oe cenerses 16805 ROAD 19%
                                                   -                      PLATTEVILLE, CGLOR ADO 80651 1
                                                   -                      PLATTEVILLE, CGLOR ADO 80651 1
February 13; 1981
February 13; 1981 Fort St. Vrain Unit No. 1 P-81051 1
  <
   ,                                Mr. Karl V. Seyfrit, Director Nuclear Regulatory Cocaission i                                    Regica IV i                                  Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012
Fort St. Vrain Unit No. 1 P-81051 1
   ,                                Mr. Karl V. Seyfrit, Director
,
Nuclear Regulatory Cocaission i                                    Regica IV i                                  Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012
.                                                                                 


==Reference:==
==Reference:==
Line 43: Line 35:
Also, please find enclosed one copy of the Licensee Event Report for-
Also, please find enclosed one copy of the Licensee Event Report for-
;                                  Reportable Occurrence Report No. 50-267/80-49.
;                                  Reportable Occurrence Report No. 50-267/80-49.
!
j                                                                                                        Very truly yours, 6Lu Don Warembourg
j                                                                                                        Very truly yours,
                                                                                  '
6Lu Don Warembourg
                                                                                                                                             % $},
                                                                                                                                             % $},
                                                                                                                                              '
1 Manager, Nuclear Produc-ion i
1
i IM/cls I
* Manager, Nuclear Produc-ion i
i
'
IM/cls I
00)
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:*
Enclosure cc: Director, MIPC                                                                                                              $
Enclosure cc: Director, MIPC                                                                                                              $
\
\
                                                                                                                                                                   / [
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3
3
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;                                ,    8102 280 gy9
;                                ,    8102 280 gy9
:
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    .
  .
                                                                    .
REPORT DATE:            Februarv 13, 1981            REPORTABLE OCCURRENCE S0-49 ISSUE l' OCCURRENCE DATE:        Sectenber 4, 1980      _
REPORT DATE:            Februarv 13, 1981            REPORTABLE OCCURRENCE S0-49 ISSUE l' OCCURRENCE DATE:        Sectenber 4, 1980      _
Page l of 3
Page l of 3 FORT ST. VRAIN NUCLEAR GE';ERATING STATION PUBLIC SERVICE COMPANY JF COLORADO.
_
FORT ST. VRAIN NUCLEAR GE';ERATING STATION
                                                                  "
PUBLIC SERVICE COMPANY JF COLORADO.
16805 WELD COUNTY ROAD 19 1/2      .
16805 WELD COUNTY ROAD 19 1/2      .
PLATTEVILLE, COLORADO 80651 REPORT No. 50-267/ 80-49/03-X-1      -
PLATTEVILLE, COLORADO 80651 REPORT No. 50-267/ 80-49/03-X-1      -
                                                                    .
Revised Final              -
Revised Final              -
                                                                  ,
IDFE !FICATION OF CCCURRE' ICE:
IDFE !FICATION OF CCCURRE' ICE:
During a routine surveillance calibration check, the setpoint of the PCRV rupture disc asse=bly, M-ll702, was found to be 326 psig. Since this set-point is higher than the 812 psig + 1* allevable by Fo rt 45 t. Vrain Techni-cal Specification LSSS 3.3.2(c), it is being reported per Fort St. Vrain Technical Specification AC 7.5.2(b)1.
During a routine surveillance calibration check, the setpoint of the PCRV rupture disc asse=bly, M-ll702, was found to be 326 psig. Since this set-point is higher than the 812 psig + 1* allevable by Fo rt 45 t. Vrain Techni-cal Specification LSSS 3.3.2(c), it is being reported per Fort St. Vrain Technical Specification AC 7.5.2(b)1.
                                                                   ;
                                                                   ;
EVENT DESCRIFTION :                                                  -
EVENT DESCRIFTION :                                                  -
                                                                  &
With the reactor shundevn and depressuri:ed for a maintenance shutdown per-iod, low set rupture disc, M-11702, was renoved from service for a schedule surveillance calibration bench test. The "as found" pressure setpoint was 326 psig. The acceptance cri:erion of LSSS 3.3.2(c) requires the set pres-sure to be 812 psig - 1" (304 psig to S20 psig).
With the reactor shundevn and depressuri:ed for a maintenance shutdown per-iod, low set rupture disc, M-11702, was renoved from service for a schedule surveillance calibration bench test. The "as found" pressure setpoint was 326 psig. The acceptance cri:erion of LSSS 3.3.2(c) requires the set pres-
                                                                  -
sure to be 812 psig - 1" (304 psig to S20 psig).
Re'er :o Figure 1. Before the test gas pressure is applied, the cutter, 1 , is recoved and a special ring is installed to limit the travel of the 3elleville washers, .(]) . These washers snap over when the set pressure is reached. Adj ust ent or the set pressure is made by positioning of the threaded ring, 3 . When the set pressure is reached, the diaphragm and washers travel a few thc usandths of an inch, which produces an audible
Re'er :o Figure 1. Before the test gas pressure is applied, the cutter, 1 , is recoved and a special ring is installed to limit the travel of the 3elleville washers, .(]) . These washers snap over when the set pressure is reached. Adj ust ent or the set pressure is made by positioning of the threaded ring, 3 . When the set pressure is reached, the diaphragm and washers travel a few thc usandths of an inch, which produces an audible
<
       " t huts . "
       " t huts . "
i
i CAUS E i
'
CAUS E i
DESCRI?!!CN:
DESCRI?!!CN:
                                                                    -
The rupture disc novement setpoint being out of tolerance was caused by. drift of the 3elleville washer operating point over the period since its last cali-l    bration surveillance.
The rupture disc novement setpoint being out of tolerance was caused by. drift of the 3elleville washer operating point over the period since its last cali-l    bration surveillance.
l 1
l 1
Line 102: Line 68:
:he rupture disc se: point was in tolerance.
:he rupture disc se: point was in tolerance.
No further corrective action is anticipated or required. _
No further corrective action is anticipated or required. _
_
s e
s e


    .
                                  -            .
                                                                                                '
a    a REPOR2ABLE OCCL"4RENCE S0-49 ISSG 1-Page 2 of 3
a    a REPOR2ABLE OCCL"4RENCE S0-49 ISSG 1-Page 2 of 3
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                      ,
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* 4                                                                              k 1 -
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                                              "
k'      l}Y):YGlY!,.
k'      l}Y):YGlY!,.
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                                                                                               \y ..
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Line 130: Line 83:
                                                   ,'.if%,3    q      -- _^ -        -
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g                                                                                        Exhaus:
Pressure                                                                    (to safety inle:
Pressure                                                                    (to safety inle:
Line 142: Line 92:
7 s"                                9 s
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  '
FIGGE 1
                    ,


    .
REPORTA3LE OCCURRENCE 80-l.9 ISSUE 1 Page 3 of 3 Prepa ed 37    _
REPORTA3LE OCCURRENCE 80-l.9 ISSUE 1 Page 3 of 3
    .
    .
,
_
_
Prepa ed 37    _
sd ~
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Asa 3.' Reed Technical Services Technician
Asa 3.' Reed Technical Services Technician Revievel 3v      / / m f_
    -
Revievel 3v      / / m f_
                         . ~4/dh:2 '
                         . ~4/dh:2 '
Technical Services Supervisor
Technical Services Supervisor Reviewed Sy.              Nd Frank M. Mathie
    --
_
Reviewed Sy.              Nd Frank M. Mathie
         .              Opera:icas Manager Approved By:        V    hh Don '4arenbourg        -
         .              Opera:icas Manager Approved By:        V    hh Don '4arenbourg        -
                                                                  !%
Manager, Nuclear Production M
Manager, Nuclear Production
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Revision as of 23:26, 30 January 2020

Forwards LER 80-049/03X-1
ML19351G406
Person / Time
Site: Fort Saint Vrain Xcel Energy icon.png
Issue date: 02/13/1981
From: Warembourg D
PUBLIC SERVICE CO. OF COLORADO
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19351G407 List:
References
P-81051, NUDOCS 8102230645
Download: ML19351G406 (4)
v • d • e


Text

3 - _ , .m ___ . . . - ,._, . . _ _ _ . .

i l d

public sentee company oe cenerses 16805 ROAD 19%

- PLATTEVILLE, CGLOR ADO 80651 1

February 13; 1981 Fort St. Vrain Unit No. 1 P-81051 1

, Mr. Karl V. Seyfrit, Director Nuclear Regulatory Cocaission i Regica IV i Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012

Reference:

Facility Operating License

! No. DPR-34 Docket No. 50-267

Dear Mr. Seyfrit:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/

80-49, Revised Final, submitted per the requirements of Technical Specifi-

cation AC 7.5.2(b)2.

Also, please find enclosed one copy of the Licensee Event Report for-

Reportable Occurrence Report No. 50-267/80-49.

j Very truly yours, 6Lu Don Warembourg

% $},

1 Manager, Nuclear Produc-ion i

i IM/cls I

00)

Enclosure cc: Director, MIPC $

\

/ [

3

, 8102 280 gy9

, ,r~ , - - . . -,---,-my ,,m,,-, . m .m y,.,,7.- ny-,- ,,,y-,,,,-,%m,..y.-, ,-r.3.-e.~ mm,,-<,-c., r.,--r--,y_-- ~,-,yny, ,w.,. - . , _ , _ , -

r--

REPORT DATE: Februarv 13, 1981 REPORTABLE OCCURRENCE S0-49 ISSUE l' OCCURRENCE DATE: Sectenber 4, 1980 _

Page l of 3 FORT ST. VRAIN NUCLEAR GE';ERATING STATION PUBLIC SERVICE COMPANY JF COLORADO.

16805 WELD COUNTY ROAD 19 1/2 .

PLATTEVILLE, COLORADO 80651 REPORT No. 50-267/ 80-49/03-X-1 -

Revised Final -

IDFE !FICATION OF CCCURRE' ICE:

During a routine surveillance calibration check, the setpoint of the PCRV rupture disc asse=bly, M-ll702, was found to be 326 psig. Since this set-point is higher than the 812 psig + 1* allevable by Fo rt 45 t. Vrain Techni-cal Specification LSSS 3.3.2(c), it is being reported per Fort St. Vrain Technical Specification AC 7.5.2(b)1.

EVENT DESCRIFTION : -

With the reactor shundevn and depressuri:ed for a maintenance shutdown per-iod, low set rupture disc, M-11702, was renoved from service for a schedule surveillance calibration bench test. The "as found" pressure setpoint was 326 psig. The acceptance cri:erion of LSSS 3.3.2(c) requires the set pres-sure to be 812 psig - 1" (304 psig to S20 psig).

Re'er :o Figure 1. Before the test gas pressure is applied, the cutter, 1 , is recoved and a special ring is installed to limit the travel of the 3elleville washers, .(]) . These washers snap over when the set pressure is reached. Adj ust ent or the set pressure is made by positioning of the threaded ring, 3 . When the set pressure is reached, the diaphragm and washers travel a few thc usandths of an inch, which produces an audible

" t huts . "

i CAUS E i

DESCRI?!!CN:

The rupture disc novement setpoint being out of tolerance was caused by. drift of the 3elleville washer operating point over the period since its last cali-l bration surveillance.

l 1

CORRECTIVE ACTION:

Further inves:igation of this occurrence revealed that the Belleville washers did not need adjust ent. -Two additional snap-over :ests demonstrated that

he rupture disc se: point was in tolerance.

No further corrective action is anticipated or required. _

s e

a a REPOR2ABLE OCCL"4RENCE S0-49 ISSG 1-Page 2 of 3

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REPORTA3LE OCCURRENCE 80-l.9 ISSUE 1 Page 3 of 3 Prepa ed 37 _

sd ~

Asa 3.' Reed Technical Services Technician Revievel 3v / / m f_

. ~4/dh:2 '

Technical Services Supervisor Reviewed Sy. Nd Frank M. Mathie

. Opera:icas Manager Approved By: V hh Don '4arenbourg -

Manager, Nuclear Production M

3

%

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