ML20063N261

Loose Parts Monitoring Sys.

ML20063N261
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	08/06/1982
From:	LONG ISLAND LIGHTING CO.
To:
Shared Package
ML20063N255	List: ML20063N254 ML20063N256 ML20063N257 ML20063N260 ML20063N261
References
23.662.01, NUDOCS 8209200140
Download: ML20063N261 (7)

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I SP Number 23.662.01 Revision: 9 Date Eff.:8/6/82 TPC TPC TPC LOOSE PARTS MONITORING SYSTEM 1.0 PURPOSE To provide detailed instructions to Station Operating Personnel for operation of the Loose Parts Monitoring System.

i l 2.0 RESPONSIBILITY i

The Operating Engineer shall be responsible for insuring the proper implementation of this procedure.

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3.0 DISCUSSION .

3.1 The Loose Parts Monitoring (LPM) System is designed to detect, process, annunciate, alarm and record information induced by acoustical / mechanical vibrations associated with loose parts impacting within the reactor primary cooling system.

3.2 The Looss Parts Monitoring System consists of four monitoring channels.

A channel generates an alert signal when an impact generates a voltage greater than the preset threshold voltage. When the number of alerts in e given time interval (e.g. 4 alert signals in a 5 second period) is exceeded, an alarm will sound and the system's tape recorder will automatically record the loose part signals. .

3.3 The LPM System also generates an audio amplified signal to provide a means - -

of listening to the output signal of a selected channel.

NOTE: 1. All Loose Parts Monitoring System component identification numbers are preceded with the system number 1B21 unless otherwise specified.

2. All control switches and indicating lights are located on 1821-PNL-252 unless otherwise specified.

3.A The following procedures are provided for the operation of the 13ose Parts Monitoring System:

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8.1 Normal Performance 8.1.1 System Startup 3 8.1.2 System Shutdown .3 8.2 Abnormal Performance Inhibiting the Loose Part Monitor Alarm 4 8.2.1 Alarm Response Procedure 4 8.2.2 Appendix 12.1 Loose Parts Monitoring Prerequisite Checklist SPF23.662.01-1 Appendix 12.2 Breaker Lineup Checklist, Loose Parts Monitoring System SPF 23.662.01-5 4.0 PRECAUTIONS 4.1 An alarm resulting from the loose part monitoring system is considered a ~

warning. Therefore, no action with respect to reactor operation should be based solely on the information obtained from the Loose Parts Monitoring System.

5.0 PREREQUISITES .

5.1 Prerequisited are delineated on the Prerequisite Checklist, SPF 23.662.01-1.

SP 23.662.01 Rev. 0 8/6/82 Page 2 J

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k 1 6.0 LIMITATIONS AND ACTIONS , i

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6.1 Technical Specifications 6.1.1 In Power Operation or Startup (CONDITIONS I and 2), the LCO of Reference 11.1 shall apply.

6.2 Operating Limits N/A 7.0 kTERIALSORTESTEQUIPMENT N/A ,

8.0 PROCEDURE 8.1 Normal Performance 8.1.1 System Startup _

8.1.1.1 Verify the Prerequisite Checklist is completed and signed.

8.1.1.2 On the Audio Monitor Module (1439D), select each of channels 1 through 4 and listen for impact noises and channel response.

6.1.1.3 On the Control Module (1433C), reset all alarms by momentarily depressing the RESET switch.

e 8.1.1.4 On the Control Module (1433C), place the Deliberate Plant Maneuver Detector inhibit (DPMD INH) switch to the AUIO position.

8.1.2 System Shutdown NOTE: The Loose Parts Monitorin,, System will normally be kept operating at all times. In plant conditions when the LPM System is.not required to be fully operational, the alarm output should be inhibited in accordance with Section 8.2.1 to preclude undue operator attention to spurious LPM alarms.

8.1.2.1 On the Control Module (1433C), place the Deliberate Plant -

Maneuver Detector Innibit (DPMD INH) switch to the MANUAL position.

SP 23.662.91 Rev. 9 8/6/82 Page 3

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8.2 Abnormai Performance ,

8.2.1 Inhibiting a Loose Part Monitor Alarm NOIE: False alert signals may be generated from certain plant anneuvers

< such as control rod stepping, reactor trips, pump starts, etc. The alert level alarm any be temporarily overriden as specified below in order to make allowances for alert signals caused by plant anneuvers.

8.2.1.1 Before the plant maneuver, place the DPMD INHIBIT switch in the MANAUAL position.

8.2.1.2 Record time LPM system inhibited and reason.

8.2.1.3 Return the DPMD INHIBIT switch t'o the AUTOo p'sitiori.~

8.2.1.4 Record time that the system was restored to normal.

8.2.2 Alarm Response Proceduce 8.2.2.1 The following Alarm Response Procedure is associated with this procedure:

ARP (Later) RPV I4ose Part Alara 9.0 ACCEPTANCE CRITERIA None 10.0 FINAL CONDITIONS . :.

10.1 Ensure all documentation has been completed and signed.

11.0 REFERENCES

11.1 Technical Specifications, Section 3/4.3.7.11 11.2 TEC Leose Parts Detection Program Manual File Code T937.419.91 i 12.0 APPENDICES 12.1 Loose Parts Monitoring Prerequisite Checklist, SPF 23.662.91-1 12.2 Breaker Lineup Checklist, loose Parts Monitoring System, SPF 23.662.91-5 SP 23.662.01 Rev. 9 8/6/82 Page 4 l

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• I APPENDIX 12.1

. . Page 1 of 1 1 DOSE PARTS N)NITORING Signature Initials Time Date Authorisation for Start (Watch Engineer) .

Initiated by Cempleted by ,

Reviewed by __

(Watch Engineer)

Step No. Procedure Initials

1. Tagging Log and Lifted 14 ads and Jumpers Log reviewed.

2. Distribution pat.s1 ID11-PNL-N2 energized.

3. System Component Power Supply Checklist (SPF 23.662.91-5) completed.

4. On the back of PNL-252, turn the main frame power switch ON.

5. On Power Monitor Module (913) turn the AC power switch ON and ensure all 4 power supply status indicators are illuminated.

6. On the Control Module (1433C), verify the auto reset period select switch is in the ENABLE position.

7. On the Annunciator Alarm Module (133C) verify the alarm inhibit indicator is extinguished.

8. On the Audio Monitor Module (1439D) verify that:

.1 Volume Control Set at 9 o' clock position.

.2 Channel Select Switch on 1

.3 Simulator status LED is extinguisbG -

9. On the Tape Recorder Interface Module (146) verify that:

.1 Start select switch in ENABLE position

.2 Tape speed select set at 7.5 ips

10. Verify that tape recorder has sufficient tape and counter reset to 99@9 SPF 23.662.91-1 Rev. 9 SP 23.662.91 Rev. 9 8/6/82 Page 5

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• APPENDIX 12.2 Page 1 of 1

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BREAKER LINEUP CHECKLIST IDOSE PARTS MDNITORING SYSTEM BREAKER REQU1 RED NUMBER DESCRIPTION POSITION INITIALS COMPUTER ROOM - WEST WALL -

ID11-PNL-N2 f6 LOOSE PARTS MONITORING SYSTEM POWER CLOSED - - -

i SPF 23.662.91-5 Rev. 9 i

SP 23.662.01 Rev. 9 8/6/82 Page 6

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1321-VBE-148A, 3 Instr. No. 1B21-VBE-149A. B Set Point Trip 4 alerts /5 seconds Raset Manual "3SSIBLE CAUSE 130EDIATE ACTION 1.0 Loose Part. 1.1 Audibly monitor the first alert channel and then the remaining channels at FNL-252 1.2 Verify tape recorder running.

1.3 Notify STA.

2.0 Noises generated by plant 2.1 Audiblymonitorfirstal'rI' e transient or maneuver. channel and then the remaining channela at FNL-252.

2.2 If no impact noises are heard,

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reset the system and stop the tape recorder.

l 0 . 2.3 Increase the gain on all channels 4 by one step. (NOTE: This may artifically trigger the system).

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• 2.4 If no impact noises are heard, l return gain settings to normal and return system to standby.

SUBSEQUENT ACTION 1.1 Evaluate the short term safety significance of the detected loose parts by observing parameters such as offgas radiation levels, jet pump operability. CRD operability, LFRM levels.

1.2 Notify the Reactor Engineer so that the long term safety significance of the loose part can be evaluated.

2.1 If repeated false alerts occur, initiate a Maintenance Work Request for I&C to adjust alert criteria.

REFERENCES SP 23.662 91

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