Status of motor operated valves aging assessment
Motor operated valves (MOVs) have a long history of operational problems in nuclear power plants. Resolution of MOV problems in the past has tended to focus on symptoms rather than root cause. Although there has been more attention focused recently on identifying root causes, problems with valve operational readiness resulting from aging and service wear still persist. In addition, weaknesses in the currently used design equations for sizing of MOVs, identified in tests carried out by industry and confirmed in the recent NRC gate valve blowdown testing, have re-enforced the need for improved in-situ methods for determining the operational readiness of MOVs, whether from aging and service wear or from improper installation and maintenance. The objective of the MOV aging assessment is to evaluate and recommend practical methods for insuring operational readiness of safety-related MOVs under all anticipated operating conditions.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6371457
- Report Number(s):
- CONF-890373-3-Vugraphs; ON: DE89008720
- Resource Relation:
- Conference: NPAR review group meeting, Rockville, MD, USA, 21 Mar 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
VALVES
WEAR
AGING
MOTORS
NUCLEAR POWER PLANTS
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
NUCLEAR FACILITIES
POWER PLANTS
THERMAL POWER PLANTS
220200* - Nuclear Reactor Technology- Components & Accessories
420200 - Engineering- Facilities
Equipment
& Techniques