ML17306A712
| ML17306A712 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/07/1992 |
| From: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Kirsch D NRC |
| References | |
| NUDOCS 9205130016 | |
| Download: ML17306A712 (12) | |
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Wp O~Aj' 4~*~4 920506 Docket No. 50-530 UNITED STATES NUCLEAR REGULATORYCOMMISSION REGION V 1450 MARIALANE WALNUTCREEK, CALIFORNIAS4596-5368 MEMORANDUM FOR:
D. F. Kirsch, Team Leader Palo Verde Unit 3 Augmented Inspection Team FROM:
SUBJECT:
J.
B. Hartin, Regional Administrator AUGMENTED INSPECTION TEAM CHARTER LOSS OF CONTROL ROOH ANNUNCIATOR SYSTEMS AT PALO VERDE UNIT 3
'After being briefed on the Hay 4, 1992 loss of control room annunciator and plant monitoring computer systems at Palo Verde Unit 3,
- NRR, AEOD, and Region V senior management determined that an Augmented Inspection Team (AIT) inspection should be conducted at Palo Verde Unit 3 to verify the circumstances and evaluate the significance of the subject event.
You have been designated as Team Leader.
Enclosed is the charter for the Augmented Inspection Team delineating the scope of this inspection.
The inspection is to be conducted in accordance with NRC Manual Chapter
- 0513, NRC Inspection
- Manual, Chapter
- 0325, NRC Inspection Procedure
- 93800, Incident Investigation Manual (NUREG 1303),
and this memorandum.
J.
B. Hartin Regional Administrator J. Richardson, NRR A. Thadani, NRR B. Grimes, NRR J.
RV S. Richards, RV H. Wong, RV D. Coe, RV G.
- Cook, RV 9205130016 920507 PDR
- DOCK 05000530 8
Enclosure:
(1)
Augmented Inspection Team Charter (2)
Inspection Plan CC:
J. Taylor, EDO J. Sniezek, EDO W. Bateman, EDO T. Hurley, NRR J. Partlow, NRR M. Virgilio, NRR B. Boger, NRR C. Rossi, NRR A. Chaffee, NRR T. quay, NRR C. Trammell, NRR F. Hiraglia, NRR W. Russell, NRR D. Kunihiro, RV g
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Concurred during conference call on 5/7/92
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Enclosure (1)
AUGMENTED INSPECTION TEAN CHARTER PALO VERDE UNIT 3 LOSS OF CONTROL ROON ANNUNCIATOR SYSTEMS ON HAY 4, 1992 The Augmented Inspection Team (AIT) is to perform an inspection to determine the causes, conditions and circumstances relevant to a Hay 4,
- 1992, event at Palo Verde, Unit 3 which has potential significant generic implications and involves questions pertaining to licensee operational and managerial performance.
In particular, the inspection should accomplish, the,following:
Develop a complete description of the event, develop a detailed sequence of events that occurred during the loss of control room annunciator
- event, and identify all equipment failures and human errors that occurred during the event and during event recovery.
2.
3.
4.
5.
6.
Determine the speci,fic circumstances and events which led up to the shorting of the 24 VDC and 480 VAC power systems and attendant loss of control room annunciator and plant monitoring computer systems on Hay 4,
1992.
This includes assessing the adequacy of system design and circuit protection equipment..
Interview licensee and contractor personnel as appropriate.
Verify and evaluate the licensee's immediate actions following this
- event, including ability to restore plant systems in a timely manner.
Operations and management effectiveness are to be evaluated.
Evaluate the effectiveness of licensee management in corrective actions subsequent to the event.
Identify and evaluate the procedures used by the licensee which address maintenance work during plant power operation.
Provide specific emphasis on the types of activities which contributed to this event.
Determine the e'ffectiveness of, and adherence to, these procedures as they relate to,the current event.
Evaluate the human factors aspects associated with this event, including:
'a
~
The circumstances surrounding the review, approval and coordination of the maintenance activities which initiated this event.
b.
Personnel training and briefings associated with those work activities.
C.
d.
Adequacy of and adherence to emergency operating,
- abnormal, and administrative procedures.
Reliance of operators on plant monitoring system including
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e.
Team work,
- command, control and communication within the control room during the event.
f.
Performance shaping factors such as familiarity and stress.
7.
Mithin the time constraints of the AIT, evaluate the effectiveness of the licensee's root cause investigation of this event, including:
a.
Thoroughness and adequacy of the licensee's evaluation of the extent of potential damage to plant components directly and indirectly associated with this event.
b.
Adequacy of the licensee's determination of any equipment design or interface problems (e.g. indication, annunciation, computer performance and interaction).
c.
Adequacy of the technical basis for licensee conclusions that all affected plant components are fully capable of return to service to perform their desi'gn functions.
8.
Assess the adequacy of the licensee's instrumentation and control
- systems, operator staffing level, operator training, procedures and equipment design to perform a safe and control'led shutdown of the reactor (and to the extent possible, the adequacy to deal with a reactor trip) following a complete loss of annunciator and computer capability, as occurred during the Palo Verde Unit 3 event.
9.
Assess the adequacy of the licensee's response to the event (.including classification, notification, manning, information updates and coordination).
10.
Provide a Preliminary Notification upon initiation of the inspection and an update at the conclusion of the inspection.
11.
Prepare a special inspection report documenting the results of the above activities within 30 days of the start of the inspection.
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Team Hembershi INSPECTION PLAN Enclosure (2)
D. Kirsch, Technical. Assistant,
- DRSP, RV Team Leader H. Royack, Reactor Inspector,
- DRSP, RV - Assistant Team Leader P. squalls, Reactor Inspector,,
- DRSS, RV D. Acker, Reactor Inspector,
- DRSP, RV F.
- Gee, Reactor Inspector,
- DRSP, RV F. Paulitz,
- SICB, NRR R. Scholl,
- SICB, NRR H. Biamonte,
Complete the actions defined by the AIT Charter.
Team Strate ies:
I.
Develop a detailed'hronology and sequence of events leading up to the loss of control room annunciator systems through termination of the Alert.
2.
Review applicable procedures (maintenance, work planning, work orders, technical
- manuals,
.alarm response, emergency
- response, abnormal operations, event reporting, etc).
3.
Review applicable logs (maintenance, engineering, operations, emergency response TSC/EOF).
Interview appropriate working level, supervisory and management personnel and assess personnel experience and background (maintenance, operations, system/design engineering, quality oversight, emergency response).
5.
6.
Determine and evaluate licensee's relevant actions prior to and during the event.
Identify any weaknesses in the licensee's performance which could have prevented the event.
7.
Identify and evaluate current licensee actions to learn from this event.
Tentative Schedule:
5/7/92 1900 5/8/92 0800 0900'rrive at Phoenix hotel (Windmill) to plan and schedule initial team acti,vities Entrance meeting at si.te with licensee Begin inspection
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5/9/92 5/10/92 5/11/92 5/12/92
. 5/13/92 5'/14/92
'6/12/92 1400 1400 1400 1400 1400 1100 1300 Brief RV management Brief RV 'management Brief RV management Brief RV management Brief RV management Complete inspection and brief RV management Exit meeting at site with.licensee Issue report
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