ML20236N817

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Rev 8 to Procedure 8.M.1-29, ATWS Functional & Trip Unit Calibr Test
ML20236N817
Person / Time
Site: Pilgrim
Issue date: 03/17/1983
From:
BOSTON EDISON CO.
To:
Shared Package
ML20236N770 List:
References
FOIA-87-644 8.M.1-29, NUDOCS 8711170020
Download: ML20236N817 (11)
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?;oesh::t No. 8.M.1-29 . ,

ATWS FUNCTICNAL AND TRIP UNIT CALIBRATION. TEST -  ;

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List of Effective Paees ,

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8.M.1-29-1 j 8.M.1-29-2 ,

8. M.1 3 8.M.1-29-4 s 8.M.1-29-5 l 8.M.1-29-6

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l Attachmer.ts , i s

8.M.1-29A-1. '

.- 8.M.1-29A-2 .I 8.M.1-29B-1

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g,3,1 29-1 Rev. 8 8711170020 FOIA 071112

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/ PURPOSF

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To provide a detailed procedure for Instrumentation Personnel to perform h

g functional tests of the ATWS Sjstem Trips.

F II. DISCUSSION A. The ATWS System should be functionally tested once per month.

f B.

The ATWS trip units to be calibrated once 'per three months.

C.

The ATWS System provides for an addition of negative reactivity header)to in' the Core (tripping recire. pumps and letting air off scram (Hi-Hi Reactor the event of a transient Water Level) without a scram having taken place. r  !

D.

The ATWS System is composed of four Trip Channels which makt two trip l

"C" compose Trip System "A" and it isand housed in_ Panel Channel "A" &

compose Trip System "B" it is housed in l 2277. Channel "B" & "D" l Panel 2278. f l

Each trip system has three trip circuits, each trip circuit is ' equipped {

vith a light system.

Two neon lamps are connected in series and are 1n i the series with the t:1p coil. During normal operation the trip relays f are de-energized (untripped) and normal voltage across each neon lamp ,

is approximately 66V p.C.

When one trip relay energizes (half trip) the voltage across lamps connected in parallel with closed contacts will go to approximately This0 g volts D.C. This indicates tripped relay contacts have closed.

voltage across lamps vill be .. measured . and. Relayrecorded on check centacts'and associate of f sheet 8.M.1-29A-2 and B-2 while trip is present.

lamps are listed on check of f sheets.

Recirculation Pump trip circuit are valid only when ptarps are NOTE: a.

running. Light vill be of f when pu=ps are off, i 4

b. Neon lamos are used in these circuit to minimize the current flow through the trip coil and prevent false trip.

III. _REFERENCE MATERIAL _

A. Rosemount Analog Trip System Manual GEK73526 B. ATWS Gystem Prints PDCR P chage 70-25 C. NEDO 21617-A D. P&ID eH-250, M-253 .

E. Tech. Spec. Tabl e 3.2.C g'

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l l 8.M.1-29-2 Rev. 8

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IV. PREREQUISITES r

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A.

Obtain nuclet.r watch engineer's initials to verify permission, prior j' -

to commencement of test.

B. Power to ATWS Systems.

C. Establish communications from rack 2205/2206 to Control Room.

f D. Confirm that no channels within the system are in calibration, test

  • l or alarm condition.

f V. APTARATUS_ j A. Rosemount Readout Assembly and Y.xtender. }

B. Calibrated DC Voltmeter.

VI. PRECAUTIONS f

A. Only one trip channel vill be tested or calibrated at one time. 1 f

VI

I. PROCEDURE

l Power Supply Supervisory Circuit Test

1. At "ATWS" Logic Panel #2277, confirm that Power Supply. e PSlA and ,

PS2A "ON" indicating light are lit.

2. Depress one at a time power supply monitoring circuit test button

~

SlA and S2A and verify that associated power supply "0N" light goes out and that "ATWS" trouble alarm annunciate on Panel 905.

, ,N Repeat Step 1 and 2 for "ATWS" Logic Panel 2278.

\ 3. and 8.M.1-295-1

4. Record results on check sheet 8.M.1-29A-1
3. Rosemount Trip Unit functional Test / Calibration verification.
1. At the "ATWS" Logic Panel, verify that Calibration Unit in the following condition:
a. Power switch in "0FF" position.
b. 1ransient current knob is pulled and fully turned counter ,

clockwise.

\

Nc. "P'iess to Cal." knob is pulled out and in "OFF" position.

, d. Trip unit test selector switch in "0FF" position.

Turn power on.

2. Plug Rosemount Readout Assembly into Calibration Unit.

l

3. Rotate both Trip Unit Test Selector Switch and " Press to Cal."

knob to the channel to be tested.

F.x : 263-121A - Position 1 263-121C - Position 2 8.M.1-29-3 Rev. B d .ww.

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- 4\ Push in the' (press to cal) knob and note the " gross failure" l - g- i light and cal. lights are oc., a S h Confira,ATWS trouble alarn annunciate on Panel C905. ,

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% Turn the stable current adjustment.until the meter on the master ji trip unit reads afd-scale. (12MA. or 3 VDC) j

7. Select the desired position of the Transient Polarity switch such that current will add (+)' or subtract (-) 'vith the preset stable  ;

current:

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(-) for level trip - W 4 f (+) for press trip .

8. Push the transient current. knob in and adjust transient current '

until one of the circuit supervisory lighte goes out and the other goes bright. On light that extinguishes maatter and" record voltage (See Section II f level on check-off sheet 8.M.1-29A-2 and B-2. t Discussion. Paragraph "D")

9. Record trip points as shown on Trip Unit Indicaror on check off she'et 8.M.1-29A-2 or 8.M.1-29B-2.

Trip point for Level Instrument 263-121A-D is : 4%22%

Trip point.for Pressure Instrument* 263-123A-D is: 78.5%+.5% -

.75%

l Trip point volt. age value shall be as fellows: s Level 262-121 A-D Trip + 1.16 VDC a. J1 and ground No Adj . Lir.its 1.24 VDC to 1.08 VDC l

Pressure 263-121 A-D Trip = 4.14 VDC . a. J1 and ground No Adj. Limits 4.11 VDC to 4.16 VDC

10. Record as found trip polut and analog data on check-off sheet 8.M.1-29A-2. or 8.M.1-29B 2 and on calibration data record wheet.

Proceed to Step 13 for Functional Test. If trip settings are differer than specified above, proceed to Step 11 for Trip Unit Calibration.  ;

'- 11. If trip set point are different than specified, proceed to calibrate the Trip Unit, as follows: .

Calibrate the Trip Unit at three different points. -

PRESSURE INSTRUMDTIATION INPUT OUTPUT AT J1 TO CROUNDS TRIP UNIT INDICATION 1VDC 0%

4ma 12ma 3VDC 50: - .

SVDC 100%

20ma i

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' 9L'1 PCT 49 J1 TO' GROUNDF, , TRIP' UNIT INDICATION

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12. Step 70 and reewrd as left condition e

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4. 13.

Confirm indicate troubla thatiri%' half (relay trip)..moni.tcrcing-lamps

~4 have change'stata and hy . ng

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' 14. Adjust transient current for mid-scale position. 12ma/3VDC;.

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'f ' ' 15e. 541L out " Paas-.co. Cal." hoh-to. isolate calibrators from trip u unit. G. ,[' - lf

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'- . 16. Confits ATWS trone, alarry is "GFF" 'at Panel C905,. t ,, M , .U'

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17. P ess gross reset button,en trip unit. . _.Q ,

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Confirm that, the cal and gross f ailure (lights) ci an hat' meter 4 s

18. .

f indicate operating condition status (also . assure trip light 'aud logic '

wnitoring haps have riturned to their normal states).

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l NOTE: 'If operating conditions have to be confirmed. verify that r '

reading of mater un6er calibration matches the reading i./ / indicated by the three other , channels of vpe same function within the ATWS syo6 m. -'

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19. Repeat Steps 1 through i9 for remaining channels.

VIII. ACCEPTANCE CRITERIA r A. All channels 7esicd satisf actory .and cauhd appropkSta trip relay to .

change state.; .' y B. For Calibration Test. ATWS Analo3 trip Units Mtuated as follovst 1 1 ,.

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' 263-121 A. B. C. & D actuated aa -less than 92.65 H2 O increasing (greater than or equal to '.00 VDC) 26.'-123 f . B, C & D actuated - on an increasing signal between-1171 63 psa,7 and 1203.65 psig increasing which is equal to 4.09 .o 4.18 colta.

NOTE: The dir m ence in pressure between. Tech.-Spec. and actual trip setting is to allow for instrument "O" suppression of 13.7 psig.

C. The procedure was performed as written without any unexplained discrepaneit.s as indicated by PNPS Form 8.El-293.3 -

8.E l-29-5 Rev. 8

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IX. ATTACHMENTS A. Power Supply 7tmetional Test check-Of f Sheet.

B. Functional Test Check-Off Sheet.

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CHECK-OFF SHErr j .

PANEL 2?.78 -

PREREQUISITES.

O A. Obtain Nuclear Watch Engineer's initials to verify permission to sta testing.'

B. ' Power to "ATWAS" Systems C. Establish communications from Panel 2278 to Control Room.

D. Confim that no channels are in calibration or in ~.est. .

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! Procedure A. ,

Power Supply Supervisory Circuit Test .

~~1.a. ~2S1E'"087' light'lic

.b.' PS2B "0N" light lit PS1B "0N" light goes out_ _f Depress Test Button S1B 2.a. PS2B "ON" light goes out y

- Depress Test Button S2B ,/ ,

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TEST PERFORM CHECK SHEET .,

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' PANU, 2278 Note: This sheet shall be check-off only when .the Test Step has been. ,

performd as written without deviation.

Level Pressure Instrument 263 ,123 D

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263-121B 263-121D 263-1234B Trip Unit.No.

Step Performed 1 \ \

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263-1213 1 n01B DS4B K1013 DSSB O E01D DS3D . O 263-121D 0 K101D DS4D K101D DSSD , O Relay lamps Voltage Trip Units Pres.

K2B DS3B ,O 263-123B ')

K2B DS4B K2B DS5B _Q 263-123D ' K2D DS3D O K2D DEAD . R l

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'I. ACCEPTANCE CR  :

The Ac ptance Criteria as specified in Section VIII was met. .,

Watch Engineer Date '.

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i&C Technici Date ~7 b I&C Superdiso / Date /

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Watch Engineer Date 8 /~) T3

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, 3.I.Co. Fors X58o5 PN?S OFIRATIONS MANUAI.

PROCEDURE CD.NGE NOTICI Date  ?" / 7-61 Title % 7~u/ A5 '[4f ew ,-7 3 PCN No.

Rev No '7 Procecure No. f.4 m /. -:2 9 Design 2rocecural !vpo Reason Ior New Temporary l Change PCN Procedure Procedure Change Revision only SRO Permanent Change Desired Change SRO No. O Yes No (exPi ration date >

Yes No Yes No

( ) (4 surveillance Test Schedule Affected [ ] (( Surveillance Test Schedule Form 1.3.4.F-1 Completed.

Purcose anc Su==arv of Chances (Sum:arv to oe used veroatim for Comeany Puo11 cations)

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!.ik oj/ I.if ectec pges with existing Rev. Nos'.~e;6 f v) /

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ll $ th l ~2. ct _ s'. 2 f SA :.a EVAI.UATION (ce lete Section A or B below)

A. V

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' Ineref ore tce proposed procecure ;or enange:

( ) DOIS Increase the probability of occurrence or consequences of an accident or asalfunction of equipment important to safety pre-( L PD0?.S viously evaluated in the Final Safety Analysis Report.

NOT

( ) DOES Create the possibility of an accident er malfunction of a different type than any evaluated previously in the Final

(/.PDOES Safety Analysis Report.

NOT

( ) DOI.S Reduce the margin of safety as defined in the basis for

( DOES any technical specification.

Refer e nacertal: ISC N' 3 M c.* bd 4 tf 3 J 0-P Safete Evaluatie3n was eerfe ned ib recordance with erocedure 1.3.23 Number fi.:. ~v A :. n The above listed procedure revision, safety evaluation, and PCN have best reviewed andareacceptape ~or approval bv the OR Chairman.

Reviewed b7 / ICRC) Date.7 7 Reviewed by A!)/ (CRC) Date.?/II/F3 Revision r/Aiewed in ORC Meeting 6' 97--24

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Y M E 6M'44 OR Chairman's Approval .

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' 1.3.f.A-1 Rev. 25

.. - . _ , . _ _ _ - -

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