Failure of Limitorque Motor-Operated Valves Resulting from Incorrect Installation of Pinion Gear| ML031180403 |
| Person / Time |
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| Site: |
Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, 05000000, Zimmer, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant, Skagit, Marble Hill, Crane |
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| Issue date: |
03/21/1985 |
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| From: |
Jordan E
NRC/IE |
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| To: |
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| References |
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| IN-85-022, NUDOCS 8503190659 |
| Download: ML031180403 (4) |
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Similar Documents at Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, 05000000, Zimmer, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant, Skagit, Marble Hill, Crane |
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Category:NRC Information Notice
[Table view]The following query condition could not be considered due to this wiki's restrictions on query size or depth: <code> [[:Beaver Valley]] OR [[:Millstone]] OR [[:Hatch]] OR [[:Monticello]] OR [[:Calvert Cliffs]] OR [[:Dresden]] OR [[:Davis Besse]] OR [[:Peach Bottom]] OR [[:Browns Ferry]] OR [[:Salem]] OR [[:Oconee]] OR [[:Mcguire]] OR [[:Nine Mile Point]] OR [[:Palisades]] OR [[:Palo Verde]] OR [[:Perry]] OR [[:Indian Point]] OR [[:Fermi]] OR [[:Kewaunee]] OR [[:Catawba]] OR [[:Harris]] OR [[:Wolf Creek]] OR [[:Saint Lucie]] OR [[:Point Beach]] OR [[:Oyster Creek]] OR [[:Watts Bar]] OR [[:Hope Creek]] OR [[:Grand Gulf]] OR [[:Cooper]] OR [[:Sequoyah]] OR [[:Byron]] OR [[:Pilgrim]] OR [[:Arkansas Nuclear]] OR [[:Braidwood]] OR [[:Susquehanna]] OR [[:Summer]] OR [[:Prairie Island]] OR [[:Columbia]] OR [[:Seabrook]] OR [[:Brunswick]] OR [[:Surry]] OR [[:Limerick]] OR [[:North Anna]] OR [[:Turkey Point]] OR [[:River Bend]] OR [[:Vermont Yankee]] OR [[:Crystal River]] OR [[:Haddam Neck]] OR [[:Ginna]] OR [[:Diablo Canyon]] OR [[:Callaway]] OR [[:Vogtle]] OR [[:Waterford]] OR [[:Duane Arnold]] OR [[:Farley]] OR [[:Robinson]] OR [[:Clinton]] OR [[:South Texas]] OR [[:San Onofre]] OR [[:Cook]] OR [[:Comanche Peak]] OR [[:Yankee Rowe]] OR [[:Maine Yankee]] OR [[:Quad Cities]] OR [[:Humboldt Bay]] OR [[:La Crosse]] OR [[:Big Rock Point]] OR [[:Rancho Seco]] OR [[:Zion]] OR [[:Midland]] OR [[:Bellefonte]] OR [[:Fort Calhoun]] OR [[:FitzPatrick]] OR [[:McGuire]] OR [[:LaSalle]] OR [[:05000000]] OR [[:Zimmer]] OR [[:Fort Saint Vrain]] OR [[:Shoreham]] OR [[:Satsop]] OR [[:Trojan]] OR [[:Atlantic Nuclear Power Plant]] OR [[:Skagit]] OR [[:Marble Hill]] OR [[:Crane]] </code>. |
SSINS No.:
6835 IN 85-22
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C.
20555
March 21, 1985
IE INFORMATION NOTICE NO. 85-22:
FAILURE OF LIMITORQUE MOTOR-OPERATED
VALVES RESULTING FROM INCORRECT
INSTALLATION OF PINION GEAR
Addressees
All nuclear power reactor facilities holding an operating license (OL) or a
construction permit (CP).
Purpose
This information notice is provided to alert recipients of a potentially signi- ficant problem pertaining to the incorrect installation of pinion gears in
Limitorque motor-operated valves.
It is expected that recipients will review
the information for applicability to their facilities and consider actions, if
appropriate, to preclude a similar problem occurring at their facilities.
However, suggestions contained in this notice do not constitute NRC require- ments; therefore, no specific action or written response is required.
Description of Circumstances
On December 21, 1984 and February 20, 1985, the Tennessee Valley Authority
reported [Licensee Event Report (LER) 84-013] failure of the outboard high
pressure coolant injection (HPCI) valve to open at the Browns Ferry Nuclear
Power Station Unit 3. Operators observed the failure while attempting to
perform an operability surveillance on the HPCI system.
An inspection of the Limitorque operator revealed that the pinion gear had been
installed in a reversed position.
This reversed installation resulted in only
about one third of the normal gear mesh surface and the complete wearing away
of the portion of the pinion gear teeth that were in contact with the shaft
(drive) gear.
With the pinion gear teeth worn away, the motor could no longer
operate the valve.
This inspection also revealed that the DC shunt field for
the operator had failed.
With the shunt field open, the valve travel speed was
limited only by load.
A review of completed surveillances since 1980 revealed
that the travel time for the valve had been about 8 seconds.
This is approx- imately one half of the normal travel time of 16 seconds and may have acceler- ated the gear tooth erosion.
8503190659
IN 85-22 March 21, 1985 Discussion:
A similar problem was found at Browns Ferry Nuclear Power Station Unit 1 (LER
79-035 reported January 2 and March 11, 1980, and February 12, 1981) and at
Unit 2 (LER 80-2 reported March 11, 1980).
Several factors contribute to the potential for the reverse installation of the
pinion gear, including the following:
(1) the reverse installation is rela- tively easy and not readily detected by observation, (2) the reverse instal- lation is not revealed in postmaintenance testing (except for Limitorque
operator Types SMB 00 and SMB 000), and (3) the pinion is installed in one
direction in certain types of Limitorque operators while in others it is
properly reversed 1800.
Because Limitorque valve operators are used for many
safety-related valve applications, the unexpected failure of a valve to operate
electrically could be very significant.
Corrective actions initiated by the licensee include:
1.
Conducting a sampling of accessible safety-related Limitorque valve
operators to ensure correct pinion gear installation.
Should the sampling
give a positive indication that other safety-related Limitorque valve
operators are suspect, develop a program for their inspection to precede
corrective action 4 below.
2. Adding a requirement for independent verification of the correct installa- tion of pinion gear to applicable maintenance procedures.
-
3. Adding a caution statement to applicable maintenance and electrical
procedures to ensure that personnel verify the correct Limitorque valve
operator model, and to warn that incorrect installation cannot be detected
in postmai'ntenance testing and can lead to unexpected failure of the valve.
4. Adding inspection of the pinion gear installation and gear tooth wear to
the preventive maintenance program for Limitorque valve operators.
5. Adding the inspection of the shunt field for primary containment isolation
valve dc operators to the Limitorque valve operator inspection program.
6.
Providing training on proper pinion gear installation and the failure mode
for Limitorque valve operators to all responsible crafts personnel, including electricians.
IN 85-22 March 21, 1985 No specific action or written response is required
If you have any question about this matter, please
istrator of the appropriate NRC regional office or
by this information notice.
contact the Regional Admin- this office.
Director
Divi
n of Emergency Preparedness
an Engineering Response
Office of Inspection and Enforcement
Technical Contacts:
Silas David Stadler, RII
(404) 221-5600
Richard J. Kiessel, IE
(301) 492-8119 Attachment:
List of Recently Issued IE Information Notices
Attachment 1
IN 85-22
March 21, 1985
LIST OF RECENTLY ISSUED
IE INFORMATION NOTICES
Information
Date of
Notice No.
Subject
Issue
Issued to
85-21
85-20
85-19
85-10
Sup. 1
84-18
83-70
Sup. 1
85-17
85-16
85-15
85-14
Main Steam Isolation Valve
Closure Logic
3/18/85 Motor-Operated Valve Failures 3/12/85
Due To Hammering Effect
Alleged Falsification Of
Certifications And Alteration
Of Markings On Piping, Valves
And Fittings
Posstensioned Containment
Tendon Anchor Head Failure
Failures Of Undervoltage
Output Circuit Boards In The
Westinghouse-Designed Solid
State Protection System
Vibration-Induced Valve
Failures
Possible Sticking Of ASCO
Solenoid Valves
Time/Current Trip Curve
Discrepancy Of ITE/Siemens-
Allis Molded Case Circuit
Breaker
Nonconforming Structural
Steel For Safety-Related
Use
Failure Of A Heavy Control
Rod (B4C)
Drive Assembly
To Insert On A Trip Signal
3/11/85
3/8/85
3/7/85
3/4/85
3/1/85
2/27/85
2/22/85
2/22/85
All PWR facilities
holding an OL or CP
All power reactor
facilities holding
an OL or CP
All power reactor
facilities holding
an OL or CP
All power reactor
facilities holding
an OL or CP
All Westinghouse
PWR facilities
holding an OL or CP
All power reactor
facilities holding
an OL or CP
All power reactor
facilities holding
an OL or CP
All power reactor
facilities holding
an OL or CP
All power reactor
facilities holding
an OL or CP
All power reactor
facilities holding
an OL or CP
OL = Operating License
CP = Construction Permit
|
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|
| list | - Information Notice 1985-01, Continuous Supervision of Irradiators (10 January 1985)
- Information Notice 1985-02, Improper Installation and Testing of Differential Pressure Transmitters (11 January 1985)
- Information Notice 1985-03, Separation of Primary Reactor Coolant Pump Shaft and Impeller (15 January 1985)
- Information Notice 1985-04, Inadequate Management of Security Response Drills (17 January 1985)
- Information Notice 1985-05, Pipe Whip Restraints (23 January 1985)
- Information Notice 1985-06, Contamination of Breathing Air Systems (23 January 1985, Topic: Spent fuel rack)
- Information Notice 1985-07, Contaminated Radiography Source Shipments (29 January 1985)
- Information Notice 1985-08, Industry Experience on Certain Materials Used in Safety-Related Equipment (30 January 1985)
- Information Notice 1985-09, Isolation Transfer Switches and Post-Fire Shutdown Capability (31 January 1985, Topic: Safe Shutdown)
- Information Notice 1985-10, Posttensioned Containment Tendon Anchor Head Failure (6 February 1985, Topic: Stress corrosion cracking)
- Information Notice 1985-11, Licensee Programs for Inspection of Electrical Raceway and Cable Installations (11 February 1985)
- Information Notice 1985-12, Recent Fuel Handling Events (11 February 1985, Topic: Eddy Current Testing)
- Information Notice 1985-13, Consequences of Using Soluble Dams (21 February 1985, Topic: Hydrostatic)
- Information Notice 1985-14, Failure of a Heavy Control Rod (B4C) Drive Assembly to Insert on a Trip Signal (22 February 1985)
- Information Notice 1985-15, Nonconforming Structural Steel for Safety-Related Use (22 February 1985)
- Information Notice 1985-16, Time/Current Trip Curve Discrepancy of ITE/Siemens-Allis Molded Case Circuit Breaker (27 February 1985)
- Information Notice 1985-17, Possible Sticking of Asco Solenoid Valves (1 March 1985)
- Information Notice 1985-18, Failures of Undervoltage Output Circuit Boards in the Westinghouse-Designed Sold State Protection System (7 March 1985)
- Information Notice 1985-19, Alleged Falsification of Certifications and Alteration of Markings on Piping, Valves, and Fittings (11 March 1985)
- Information Notice 1985-20, Motor-Operated Valve Failures Due to Hampering Effect (12 March 1985)
- Information Notice 1985-21, Main Steam Isolation Valve Closure Logic (18 March 1985)
- Information Notice 1985-22, Failure of Limitorque Motor-Operated Valves Resulting from Incorrect Installation of Pinion Gear (21 March 1985)
- Information Notice 1985-23, Inadequate Surveillance and Postmaintenance and Postmodification System Testing (22 March 1985)
- Information Notice 1985-24, Failures of Protective Coatings in Pipes and Heat Exchangers (26 March 1985, Topic: Ultimate heat sink, Coatings)
- Information Notice 1985-25, Consideration of Thermal Conditions in the Design and Installation of Supports for Diesel Generator Exhaust Silencers (2 April 1985, Topic: Coatings)
- Information Notice 1985-26, Vacuum Relief System for Boiling Water Reactor Mark I and Mark II Containments (2 April 1985, Topic: Coatings)
- Information Notice 1985-27, Notifications to the NRC Operations Center and Reporting Events in Licensee Event Reports (3 April 1985, Topic: Coatings)
- Information Notice 1985-28, Partial Loss of AC Power and Diesel Generator Degradation (9 April 1985, Topic: Coatings, Overspeed)
- Information Notice 1985-30, Microbiologically Induced Corrosion of Containment Service Water System (19 April 1985, Topic: Hydrostatic, Coatings, Biofouling)
- Information Notice 1985-31, Buildup of Enriched Uranium in Ventilation Ducts and Associated Effluent Treatment Systems (19 April 1985, Topic: Coatings)
- Information Notice 1985-32, Recent Engine Failures of Emergency Diesel Generators (22 April 1985, Topic: Coatings)
- Information Notice 1985-33, Undersized Nozzle-To-Shell Welded Joints in Tanks and Heat Exchangers Constructed Under the Rules of the ASME Boiler and Pressure Vessel Code (22 April 1985)
- Information Notice 1985-34, Heat Tracing Contributes to Corrosion Failure of Stainless Steel Piping (30 April 1985, Topic: Hydrostatic)
- Information Notice 1985-35, Failure of Air Check Valves to Seat (30 April 1985, Topic: Loss of Offsite Power)
- Information Notice 1985-35, Failure of Air Check Valves To Seat (30 April 1985, Topic: Loss of Offsite Power)
- Information Notice 1985-37, Chemical Cleaning of Steam Generators at Millstone 2 (14 May 1985, Topic: Feedwater Heater, Eddy Current Testing)
- Information Notice 1985-38, Loose Parts Obstruct Control Rod Drive Mechanism (21 May 1985)
- Information Notice 1985-39, Auditability of Electrical Equipment Qualification Records at Licensees Facilities (22 May 1985)
- Information Notice 1985-40, Deficiencies in Equipment Qualification Testing and Certification Process (22 May 1985)
- Information Notice 1985-43, Radiography Events at Power Reactors (30 May 1985, Topic: High Radiation Area, Scaffolding)
- Information Notice 1985-44, Emergency Communication System Monthly Test (30 May 1985, Topic: Health Physics Network)
- Information Notice 1985-46, Clarification of Several Aspects of Removable Radioactive Surface Contamination Limits for Transport Packages (10 June 1985)
- Information Notice 1985-47, Potential Effect of Line-Induced Vibration on Certain Target Rock Solenoid-Operated Valves (18 June 1985)
- Information Notice 1985-48, Respirator Users Notice: Defective Self Contained Breathing Apparatus Air Cylinders (19 June 1985, Topic: Hydrostatic)
- Information Notice 1985-49, Relay Calibration Problem (1 July 1985)
- Information Notice 1985-50, Complete Loss of Main and Auxiliary Feedwater at a PWR Designed by Babcock & Wilcox (8 July 1985, Topic: Overspeed trip, Overspeed)
- Information Notice 1985-51, Inadvertent Loss or Improper Actuation of Safety-Related Equipment (10 July 1985)
- Information Notice 1985-52, Errors in Dose Assessment Computer Codes and Reporting Requirements Under 10 CFR Part 21 (10 July 1985, Topic: Basic Component)
- Information Notice 1985-53, Performance of NRC-Licensed Individuals While on Duty (12 July 1985)
- Information Notice 1985-54, Teletherapy Unit Malfunction (15 July 1985)
... further results |
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