ML20236N784
| ML20236N784 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 03/25/1981 |
| From: | BOSTON EDISON CO. |
| To: | |
| Shared Package | |
| ML20236N770 | List: |
| References | |
| FOIA-87-644 TP-81-13, NUDOCS 8711170008 | |
| Download: ML20236N784 (5) | |
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SOS"OX Y N SU/Gi.1SO; 1 COMPANY NUCLEAR OPERATIONS DEPAR'OfENT P" CR3! NUCLEAR POWER STATION Procedure No.
T? 81-13 1
ATWS-ARI AUTO RESET TDfE DELAY CHANGE
?NPS 1 ON LINE l
l List of Effective Pares S1-13-1 Rev. 0 81-I3-2 Rev. 0 81-13-3 Rev. O A::ach=ents, 81-13A-1 Rev. 0
/
D y 80/
Approved P'
Pilgri: 4cx: ion /P.anage 3 *Sf'$
y, 81-13-1 Rev. O B711170000 871112 PDR FOIA PDR SORG187-64,4
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1.
PURPCSE The purpose of this Work Instruction is to provide direction for; timely, safe perior=ance of a calibration change to the ANS/ARI trip system.
Sp ecifically.
the " Auto Reset" feature of relay 113A (AWS Channel A) and-relay 113B (ATWS q
Channel B) vill have their tine delay settings changed from the current'30 '
l second setting to 55 *5 seconds.
II.
PRECAUTIONS The Operations Dept, should'be prepared'to take appropriate action to deal with a>
possible inadvertent trip of the AWS-RPT and/or ARI functions.
Although no problem of this nature is expected, appropriate procedures / actions.should.be
, l reviewed to avoid " surprises".
- j III. REFERENCES l
l
'ATWS Drawing (Issued for Construction) Design Rev.'A to Print #915E218, Sheet 9.
IV.
?REREOUISITES This proposed work instruction must be reviewed by appropriate plant staff to assure
- applicability to the "As Found" field installation conditions.
V.
?ROCIDURE 1.
Obtain W.E. approval to perform work designated on the'FRN to PDCR 79-25, dated 3/13/81.'
l 2.
At AWS Logic Cabinet 2277, " Carefully" remove fuses FK6A F17A, F18A, F19A.
3.
At terminal strip AA, lift and tape ARI field cable, scheme SANS26J, from car =inals 74 & 75.
4.
Adjust and calibrate the c1=e delay setting -on '"'D relay 113A by momentarily applying a ju=per from fuse F20A to ter=inal'AA 73 or 74.
This will seal in relay 103A with an audible " click" (time zero) Monitor the voltage (120 VDC) at ter=inals AA 74 & 75 while the relay is timing and use the voltmeter voltage change as a detector of " time cut".
Set the ri=e delay to 55 sec *5 sec.
Repeat the steps described as necessary l
co fine-tune the adjuscnent.
Q 5.
'Upon completion of relay calibration, install fuses F16A, F17A, F18A and F19A their designated locations, observing that no trip's are present on' tripping at indicator units while installing fuses.
6.
Check Logic cabinet 2277 and remote annunciator 0 Fanel 905 to verify'that
.any trips are reset.
l 7.
At terminal strip AA, determinate field cable SANS26J on terminals 74'and 75.
8.
Perform the ?NPS plant standard functional surveillance test on AWS logic Cabinet 2277 to confirm operability after maintenance.
l 9.
Repeat steps V.2 through V.9 for:
a.
ATWS Logic Cabinet 2278 f
.b -
Rc= oval of fuses F165, F1 J18B, F19B.
a.
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ARI field cable,, scheme SBNS26J.
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d.
Time delay relay 113B calibration using jumper f rom fuse F203.' -
Installacien of fuses F16B, F173,'F183, F193.-
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e.
i f.
Reset of ab trips, s.
Determination of field cable SBNS26J.
h.
Performance of functional surveillance test on AIUS Logic Cabinet 2278.
VI.. Notify the Watch Engineer on comp et on of Test / Calibration.
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Notify the Watch Engineer of any discrepanc1es and record same on'PNPS Checkoff-Form VII.
attached.
VIII. Return co=pleted PNPS, check-off to I&C Engineer and a copy to the Management.
f Services Group.
i IX.
ACCEPTANCE CRITERIA A.
This test was performed as written with no unexplained discrepancies.
B.
Auto Reset feature of Relay 113A (ATWS Channel A)"and ' Relay 1133 (ATWS Channel B) have their new settings at 55 *5 seconds.
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i 81-13-3 Rev, 0 4
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- A*'WS / AR AU""O RESET '"DfE DELAT ICEANGE CRECK-OFJ L*ST STEP
- TECE/INIkI'ALS Per'ission obtained
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3.
Renove fuses; F16A, F17A, FISA, F19A.
s C.
Life and tape ARI field cable.
M# //N[b D.
Adjust and calibrate TD ralay 113A to 55
- 5 seconds o/
/-
/
E.
Install. fuses while observing no trips.
I
- 1.. Fuses installed; F16A, F17A, F18A, Il9A 8
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Checklogiccabinet2577andremoteannu.nciatoratPanel905 G.
[dr' ',
to verify all trips are reset.
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- 1.
l E.
Reternicate field cable SANS26J
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t t.
I.
Perform PNPS functional surv. test 8.M.1-29 A s' /M4
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J.
Notify Watch Engineer on completion on ATWS Logic Cabinet 2277 My' //[$/
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t f
K.,
A""4S Logic Cabinet 2278, remove fuses F163,. F173, F183, F193
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L.
Lift and tape ARI field cable
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M.
Adjust and calibrate TD relay 1133 to 55 *5 sec
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N.
Install fuses while observing no trips 1.
3u es installed; F163, F173, 718B, F193 YME'
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O.
Check logic cabinet 2278 and remote annunciatoreat Panel 905-to verify all trips are reset.
,M, o,-
P.
Recer.inate field cable SBNS26J
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Q.
Perform ?NPS functional surv. test 8 M.1-29.
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R.
Notify W.E. on completion of ATWS Logic Cabinet 2278.
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S.
Notify W.E. of an diser pancies and record same on PNPS Check-off forn.
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Return completed ?NPS check-off to the I&C Engineer and a copy s
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to the Management Services Group.
- /t,/
Date Perfotmed
,2[
Plant Status
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9 /.l.O/1 Nuclear Control Tec M /L'I I&C Supervisor o
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Date ACCEPTANCE CRITERIA:
The aca ptance cri ria was satisfied as stated in Step IX.
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