ML11243A053
| ML11243A053 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/10/2009 |
| From: | Vria J Southern California Edison Co |
| To: | John Reynoso NRC/RGN-IV/DRP |
| References | |
| FOIA/PA-2011-0157 | |
| Download: ML11243A053 (11) | |
Text
Baca, Bernadette From: [~b~6) @sce corn Sent: Wednesday, June 10, 2009 9:48 AM To: Reynoso, John
Subject:
3G002 work Attachments: 3GO02 Speed switch.pdf
- John, Only the speed switch was replaced; the speed probe checked out satisfactory.
( P(tj-,
.1
'I, NUCLEAR ORGANIZATION WORK PROCESS PROCEDURE S0123-XX-5 UNITS 1, 2 AND 3 REVISION 23 PAGE 73 OF 78 I ATTACHMENT 9 RETEST REVIEW COMMITTEE OPERABILITY TEST REVIEW SAMPLE RETEST COMMITTEE REPORT DATE: 0(v I Q Q El See attached list of Order WCA I WC D I WAR/*--_-RDER N__'______ Order Listed Below 0-:er~M ':fRKcP-C)UPETI~ 15 E6T2'~ i
_ _ _ __......._".... . ........ _ ... .... __ _. _ ... ..
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E T ...Y
- 1?tP3/n 57V 9-53q~oO%600 SO3 VtcO1!-V-. 7. ZJ99 The specified retest(s) as stated on the above WCA / WCD I WAR is ( are ) satisfactory for the work identified in the above listed Orders. ( Use the attachedchecklist to ensure, as a minimum, the specified retest(s) are satisfactory).
LMSNO If NO, then specify retest additions andlor deletions. State the reason why the additional test Is or is NOT required and ensure the WCA I WCD I WAR ( both electronic and hard copy original) are updated to reflect the additional retest(s) or deletions.
Signature indicates concurrence with the retest specified on the WCA / WCD I WAR and/or retest additions I deletions as specified on this report.
Approved By: I(b)(6)
Ops. Representative:
r-na. Paz nrjcannffunm r
Engineering Representativ.approval requires POS 253149 qualification. Verified by: -*F- I 01 (b)(6)
Maint. Representative!
! F Additional representatives should sign and list their respective organization.
(b)(6) (b)(6)
-i Document completion of this report In the WCA I WCD I WAR.
PAGE4 0F5 ATTACHMENT 9 ATTACHMENT 9 PAGE 4 OF 5
3G002 Calib/Instl. Speed Probes & Switch Work Plan:
1.0 Objective and Scope:
1.1 Calibrate Bench Test New Speed Switch and Install New Speed Probes 2.0
References:
2.1 Drawings & Procedures:
32342 Sh. 1 31640 Sh. 8 2.2 Personnel Qualifications for this work order is JTEST, Test A Functioning Journeyman 2.4 Associated orders.
800317574
3.0 Prerequisites
3.1 Identify continuous use procedures.
3.2 Verify current REV's for all procedures and drawings.
3.3 Perform Positive Component Verification IAW sections 6.10 - 6.12 of S0123-I-1.43.
4.0 Precautions
4.1 Electrical safe work practices S0123-XVI-24 4.2 Component Classification is "CRITICAL A" Speed Switch Calibration 5.0 Work Instructions:
5.1 Obtain a replacement Speed Switch Model ESSB-2AT.
5.1.1 Connect an oscillator output to relay "Al" (3HSE947) input terminals 11 and 1 5.1.2 Connect the 125 Vdc voltage supply lead to relay terminal 19 (+) and 20 (-); ensure correct polarity of connections 5.1.3 Connect ohmmeter to "NO" at terminals 5 and 6 of the "Al" device 5.1.4 Connect ohmmeter to "NO" at terminals 8 and 10 of the "Al" device
5.1.5 Verify power supply polarity, then power up and set output to approximately 125 Vdc Calculation formula: (diesel rpm) x 1.6 = hz 5.1.6 Energize the previously installed oscillator such that the output is not less than, but approximately equal to 1.4 volts peak to peak at approximately 1440 hz (900 rpm) 5.1.7 Leave the relay in this condition until unit exhibits stable characteristics (approx. 2 Hours) 5.1.8 Reduce the oscillator frequency setting from 1440 hz to 160 hz 5.1.9 Verify that ohmmeter for "NC" is indicating closed and ohmmeter for "NO" is indicating open.
5.1.10 Obtain as found calibration data for speed switch contacts 8 and 10 by raising oscillator output frequency until engine speed relay contacts 8 and 10 operate; ohmmeter connected to "NO" indicates closed; expected = 240 hz +/- 10 hz As found setting for "NO" contacts 8 and 10 = hz 5.1.11 On increasing frequency, at approximately 240 hz +/- 10 hz, document operation/non-operation of the following:
5.1.12 Ohmmeter for "NC" continues to indicate closed
[ I Sat [ I Unsat 5.1.13 Ohmmeter for "NO" updates to now indicate closed I I Sat [ ] Unsat 5.1.14 Obtain as found calibration data for speed switch contacts 5 and 6 by raising oscillator output frequency until contacts 5 and 6 operate, ohmmeter to connected to "NC" indicates open; Expected = 1392 hz +/- 10 hz As found setting for "NC" contacts 5 and 6 = hz.
5.1.15 On increasing frequency, at approximately 1392 hz +/- 10 hz, document operation/non-operation of the following:
5.1.16 Ohmmeter for "NC" updates to now indicate open
[ ] Sat [ I Unsat 5.1.17 Ohmmeter for "NO" continues to indicate closed
[ I Sat [ ] Unsat Note:
The following steps, for calibration adjustment, can be marked N/A if as-found values are within acceptance criteria 5.2 Perform the following if Speed Switch needs to be adjusted:
5.2.1 Remove the relay metal plate by unscrewing the 2 #4-20 screws. Before making any adjustments, carefully study the potentiometer locations on the unit to locate the correct potentiometer 5.2.2 Remove the #8-32 screw over the correct potentiometer; the potentiometer configuration is 20 turn rotation units with over travel on either end; if a 'click' is heard and no adjustment affect is observed, then rotate the potentiometer in the opposite direction 5.2.3 Potentiometer adjustments should be done very carefully; upon completion of adjustments replace seal screws and metal plate 5.2.4 The side of the relay is marked to indicate the applicable potentiometer identification letter and factory set hz for each switch number; clockwise rotation of potentiometer raises the set point hertz: the reset point hertz will also be raised.
<<Relay Calibration Steps (found out of tolerance)>>
Calculation formula: (diesel rpm) x 1.6 = hz.
5.2.5 Calibrate contacts 8 and 10 by raising oscillator output frequency until engine speed switch contacts 8 and 10 operate, ohmmeter to "NO" indicates closed, at 240 hz +/- 10 hz As left setting for "NO" contacts 8 and 10 = _ hz (230 - 250 hz)
As left calibration frequency magnitude = vac 5.2.6. Lower frequency to reset speed switch, then raise frequency to 240 hz +/- 10 hz, two more times to verify correct operation of speed switch contacts; 5.2.7 On increasing frequency, verify that the following occurs at 240 hz +/- 10 hz; re-perform previous step as required 5.2.8 Ohmmeter for "NC" continues to indicate closed.
I I Sat C ] Unsat 5.2.9 Ohmmeter for "NO" updates to now indicate closed.
Sat [ ] Unsat 5.2.10 Calibrate contacts 5 and 6 by increasing oscillator output frequency until engine speed switch contacts 5 and 6 operate, ohmmeter to connected to "NC" indicates open, at 1392 hz +/- 10 hz.
As left setting for "NC" contacts 5 and 6 _ _ hz.
(1382 - 1402 Hz)
As left calibration frequency magnitude = Vac 5.2.11 Lower frequency to reset speed switch, then raise frequency to 1392 hz +/- 10 hz two more times to verify correct operation of speed switch contacts 5.2.12 On increasing frequency, verify that the following occurs at 1392 hz +/- 10 hz; re-perform previous step as required 5.2.13 Ohmmeter for "NO" continues to indicate closed Sat [ ] Unsat 5.2.14 Ohmmeter for "NC" updates to now indicate open
[ I Sat [ ] Unsat Initial Date / /
5.3 Disconnect test equipment 5.4 Record Speed Switch Serial number Below.
SN#
Discuss any noted discrepancies with supervisor and generate a NOTIFICATION if applicable 5.5 Obtain Engine and Governor Speed Probes.
5.6 Remove Engine And Governor Probes 5.7 Replace with New Probes
<<Procedure SO23-II-11.156>>
5.8 Perform steps called out:
5.8.1 Engine speed probe (Gi), steps 6.2.2 thru 6.2.5 5.8.2 Governor speed probe (A3), steps 6.2.2 thru 6.2.5
- 5 N/A as found for new probes Initial Date / /
Speed Switch Removal and Replacement 5.9 At 3L160 Panel, De-term Al Speed Switch, Safe Off wiring and Remove Switch IAW S0123-II-15.3 5.10 Replace New Al Switch and Re-Term IAW S0123-II-15.3 PERFORMED BY Date: / /
PEER CHECK PERFORMED BY Date: / /
5.11 [ ] FME considerations for routine test work, IAW S0123-I-1.18 5.11.1 Prior to securing panel doors, ensure that all materials, M&TE, test leads, and tools have been removed 5.11.2 Additionally, ensure any debris such as cable tie trimmings, metallic fragments, wire markers, broken possum tags, or wire trimmings, that may be present in the work space, have been removed 5.11.3 Secure all panel covers and doors that were disturbed for work access 5.11.4 ( ] FME requirements performed Initial Date / /
6.0 Post Maintenance Testing PMT Speed Probes And Speed Switch operation will be verified during OPS Diesel Run 7.0 Supervisor has debriefed craft assigned to this work activity, and has verified that work has been satisfactorily completed 7.1 Supervisor concurs that the work authorization may be Released Performed By Date / /
Supervisor 7.2 Work Authorization Released Performed By Date: / I Troubleshoot 3G002 Trip 1.0 Objective and Scope 1.1 Troubleshoot 3G002 Trip IAW the Maintenance Engineer Support Requested in the S0123-XV-2 attachment 5.
2.0 References 2.1 Drawings 33515-2 33639-3 E/D 32342-1 thru 6 E/D 32343-1 E/D 32344-1 and 2 E/D 32346-1 E/D 33374 E/D 33375 W/D 33638-1 thru 12 2.2 Procedures S0123-XV-2 S0123-XVI-24 S0123-11-15.3 2.3 Related Orders None 2.4 Personnel Qualifications Standards of the workers involved in activities of this order requires evaluation by Supervision.Ref S0123-XXI-1.11.13, att. 34, pages 73,74,75.
[ ] FJTEST, Test A Functioning Journeyman Performed by date / /
Supervisor 3.0 Prerequisites 3.1 Identify continuous use procedures.
3.2 Verify all procedures and drawings are current including latest REV.s.
3.3 Perform positive component verification lAW S0123-I-1.43, sections 6.10 - 6.12.
4.0 Precautions 4.1 Standardized Electrical Safe Work Practices are to be utilized during the performance of this work order. Refer to S0123-XVI-24.
- 2-4.2 Component Classification is "CRITICAL All Component Classification Acknowledged [ 3
- CAUTION ***
Voltage is present during energized testing and/or troubleshooting.
5.0 Work instructions Note:
All wires temporarily altered for test or repair purposes, shall be documented IAW S0123-II-15.3. Wire Restorations shall be independently verified tight, see S0123-I-4.59 for requirements. Use caution to avoid disturbing wiring or devices adjacent to the target work area.
<<< Troubleshooting >>>
5.1 USE troubleshooting procedure S023-XV-2, to investigate Trip Problem of 3G002.
(Document all alterations IAW S0123-I-15.3.)
5.2 DOCUMENT "Initial Problem Statement". Review with supervisor and request supervision to complete work plan.
Performed by date / /
Supervisor 5.3 FILL out attachment 5, Risk Assessment and obtain approval prior to developing troubleshooting plan IAW S023-XV-2.
Initial Date /_ _/
5.4 FILL out attachment 5, "Troubleshooting Plan" and obtain supervisor approval for each troubleshooting plan.
[ ] Record any deficiencies found in the work done section.
Initial Date _ I 5.5 OBTAIN supervisor approval for repair plan.
Performed by Date / /-
Supervisor 5.6 PERFORM repairs as specified by supervisor approvals.
Initial Date / /
6.0 Post Maintenance Testing RTS performed by OPS procedures.
7.0 Restoration/Post Work Activities 7.1 Perform circuit restoration.
3 All circuits restored
[ All M and TE removed Performed By Date / /
Peer Check Verified By Date / /
7.2 Document any repair actions in the MO work done section.
Make repairs IAW S0123-1-4.59 series. Complete restoration IAW S0123-II-15.3.
[ ] 3G002 Restoration Complete Performed By Date /_/
Peer Check Verified By Date ____ /
S0123-I-1.18
<< FME Considerations for Routine Test Work >>
Prior to securing panel doors or covers, ensure that all materials, M&TE, test leads, and tools have been removed.
Additionally, ensure any debris such as ty-wrap trimmings, metallic fragments, wire markers, broken possum tags, or wire trimmings, that may be present in the work space, have been removed.
FME Requirements Performed [
7.3 Supervisor has debriefed craft assigned to this work activity, and has verified that work has been completed.
Supervisor concurs that the work authorization may be released.
Performed By:
Date: / /
Supervisor Witness Point