Potential for Water Hammer, Thermal Strafication, and Steam Binding in High-Pressure Coolant Injection PipingML031190089 |
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, Three Mile Island, 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 |
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Issue date: |
12/01/1989 |
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From: |
Rossi C Office of Nuclear Reactor Regulation |
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To: |
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References |
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IN-89-080, NUDOCS 8911270002 |
Download: ML031190089 (9) |
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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, Three Mile Island, 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 |
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Mclaughlin on NRC, Regarding NRC Information Notice 2006-13: Groundwater Contamination 2020-09-03 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 [[:Three Mile Island]] 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]] </code>.
[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 [[:Three Mile Island]] 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]] </code>. |
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555 December 1, 1989 NRC INFORMATION NOTICE NO. 89-80: POTENTIAL FOR WATER HAMMER, THERMAL
STRATIFICATION, AND STEAM BINDING
IN HIGH-PRESSURE COOLANT INJECTION
PIPING
Addressees
All holders of operating licenses or construction permits for nuclear power
reactors.
Purpose
This information notice is being provided to alert addressees to potential pro- blems resulting from failure of high-pressure coolant injection((HPCI) valves
in a boiling-water reactor (BWR) to prevent leakage of feedwater into the HPCI
system during operation of the reactor at power. It is expected that recipients
will review the information for applicability to their facilities and consider
actions, as appropriate, to avoid similar problems. However, suggestions con- tained in this information notice do not constitute NRC requirements; therefore, no specific action or written response is required.
Description of Circumstances
On February 21, 1989, with Dresden Unit 2 operating at power, temperature was
greater than normal in the HPCI pump and turbine room. The abnormal heat load
was caused by feedwater leaking through uninsulated HPCI piping to the condensate 0
storage tank. During power operation, feedwater temperature is less than 350 F,
and feedwater pressure is approximately 1025 psi. Normally, leakage to the con- densate storage tank is prevented by the injection check valve; the injection
valve, or the discharge valve on the auxiliary cooling water pump. The injection
valve and the injection check.valve are shown in Attachment 1.
On October 23, 1989, with the reactor at power, leakage had increased suffi- ciently to raise the temperature between the injection valve and the HPCI 0
pump discharge valve to 2750 F and at the discharge of the HPCI pump to 246 F.
Pressure in the HPCI piping was 47 psia. On the basis of the temperature
gradient and the pressure in the piping, the licensee concluded that feedwater
leaking through the injection valve was flashing and displacing some of the
water in the piping with steam. This conclusion was confirmed by closing the
pump discharge valve and monitoring the temperature of the piping. As expected, the pipe temperature decreased to ambient.
- 891127000
o j, @
IN 89-80
December 1, 1989 Accessible portions of the HPCI piping were inspected, and some loose pipe
supports were found near the injection valves. Concrete surfaces near the
support attachment points were spalled.
The licensee declared the HPCI system inoperable on October 23, 1989, and
notified NRC pursuant to 10 CFR 50.72. After performing a review under 10
CFR 50.59, the licensee opened the normally closed injection valve, closed
the normally open discharge valve, and will use the discharge valve temporarily
as the injection valve.
Temperature measurements on the HPCI piping at Dresden Unit 3 indicated that
less significant leakage was occurring.
Discussion:
The event at Dresden is significant because the potential existed for water
hammer or thermal stratification to cause failure of the HPCI piping and for
steam binding to cause failure of the HPCI pump. Further, failure of HPCI
piping downstream from the injection valves would cause loss of one of two
feedwater pipes.
The licensee has not heard the noise that is usually associated with water
hammers. Nevertheless, loosening of the pipe supports, damage to concrete
surfaces, and the presence of steam in the piping strongly Indicate that
water hammers had occurred in the HPCI system, probably during HPCI pump
tests or valve manipulations. Temperature-monitoring instrumentation on
the piping near the injection valves was useful in detecting the leak. NRC
Information Notices 85-76, 86-01, 87-10, and 88-13 all address water hammer
events at other facilities. Attachment 2 lists these and other references
mentioned in this notice.
Concern for potential thermal stratification in the HPCI piping is related
to three events in pressurized-water reactors (PWRs) that were the basis for
issuing NRC Bulletin 88-08 and the three supplements to that bulletin. These
events occurred in one of the Farley units and in two foreign reactors. In
all of the events, water leaked either from or to the reactor coolant system
through closed valves in an emergency coolant system. Thermal stratification
of water in the piping of the emergency coolant system and fluctuations of
the interface between the hot and cold streams of water resulted in thermal
fatigue and cracking of the piping wall in the heat-affected zones of welds
and in the base metal. For these reactors, the configuration of the piping
between the reactor coolant system and the first valve in the emergency cooling
system is approximately like the configuration of the piping at Dresden. The
licensee for Dresden does intend to examine the piping ultrasonically at the
next scheduled outage to determine whether detectable damage has occurred.
During the event at Dresden, the potential for steam bindingv the HPCI pump
existed because the discharge valve was normally open. Events have occurred
in PWRs that have resulted in steam binding of auxiliary feedwater pumps.
Because the NRC staff was concerned about the availability of the auxiliary -$ '
'4, IN 89-80
December 1, 1988 feedwater pumps when needed to mitigate the consequences of an accident, the
staff Issued NRC Bulletin 85-01. The bulletin required that certain licensees
develop Procedures for monitoring the temperature of the pump discharge to
ensure that it remains at less than saturation temperature and to identify
steam binding and restore the operability of the system if it occurs.
The NRC may issue additional information as more inspection and analysis is
completed.
This information notice requires no specific action or written response. If
you have any questions about the information in this notice, please contact
one of the technical contacts listed below or the appropriate NRR project
manager. I
- e4 Charles E. Rossi, Drec
Division of Operational Events Assessment
Office of Nuclear Reactor Regulation
Technical Contacts: Eric W. Weiss, AEOD
(301) 492-9005 Roger Woodruff, NRR
(301) 492-1180
Attachments:
1. Dresden 2 - High-Pressure Coolant Injection Line
2. Referenced Generic Communications
3. List of Recently Issued NRC Information Notices
I
_ , r
1.
A B
5/1 1/89 140 F 180 F
7/18 /89 175 F 220 F
10/23/89 248 F 275 F
c
INJECTION
VALVES
D I SCHARGE
VALVE B
FEEDWATER
A
FPC I TEST RETURN
PUMP
VD (D
ul 0 oFr C-+
a CO
CD (D to Oc-,
CD CX)
DRESDEN 2 - HIGH-PRESSURE COOLANT INJECTION LINE o -1 CDM
..
0
Attachment 2 IN 89-80
December 1, 1989 REFERENCED GENERIC COMMUNICATIONS
1. NRC Information Notice No. 85-76, "Recent Water Hammer Events,"
September 19, 1985.
2. NRC Information Notice No. 86-01, "Failure of Main Feedwater Check Valves
Causes Loss of Feedwater System Integrity and Water Hammer Damage,"
January 1, 1986.
3. NRC Information Notice No. 87-10, "Potential for Water Hammer During
Restart of Residual Heat Removal Pumps," February 2, 1987.
4. NRC Information Notice No. 88-13, "Water Hammer and Possible Piping Damage
Caused by Misapplication of Kerotest Packless Metal Diaphragm Globe Valves,"
April 18, 1988.
5. NRC Bulletin 85-01, "Steam Binding of Auxiliary Feedwater Pumps,"
October 29, 1985.
6. NRC Bulletin No. 88-08, "Thermal Stresses in Piping Connected to Reactor
Coolant Systems," June 22, 1988; Supplement 1, June 24, 1988; Supplement 2, August 4, 1988; and Supplement 3, April.11, 1988.
Attachment 3 IN 89-80
December 1, 1989 LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
Information Date of
Notice No. Subject Issuance Issued to
89-79 Degraded Coatings and 12/1/89 All holders of OLs
Corrosion of Steel or CPs for LWRs.
Containment Vessels
89-56, Questionable Certification 11/22/89 All holders of OLs
Supp. 1 of Material Supplied to or CPs for nuclear
the Defense Department power reactors.
by Nuclear Suppliers
89-78. Failure of Packing Nuts 11/22/89 All NRC licensees
on One-Inch Uranium authorized to possess
Hexafluoride Cylinder and use source material
Valves and/or special nuclear
material for the heating, emptying, filling, or
shipping of uranium
hexafluoride in 30-
and 48-inch diameter
cylinders.
89-77 Debris in Containment 11/21/89 All holders of OLs
Emergency Sumps and or CPs for PWRs.
Incorrect Screen
Configurations
89-76 Biofouling Agent: Zebra 11/21/89 All holders of OLs
Mussel or CPs for nuclear
power reactors.
89-75 Falsification of Welder 11/20/89 All holders of OLs
Qualifications for or CPs for nuclear
Contractor Employees power reactors.
89-74 Clarification of Trans- 11/7/89 All manufacturers
portation Requirements and distributors of
Applicable to Return of radiopharmaceuticals
Spent Radiopharmacy Dosages for medical use, from Users to Suppliers nuclear pharmacies, and medical licensees.
89-73 Potential Overpressurization 11/1/89 All holders of OLs
of Low Pressure Systems or CPs for nuclear
power reactors.
OL = Operating License
CP = Construction Permit
IN 89-80
December 1, 1988 feedwater pumps when needed to mitigate the consequences of an accident, the
staff issued NRC Bulletin 85-01. The bulletin required that certain licensees
develop procedures for monitoring the temperature of the pump discharge to
ensure that it remains at less than saturation temperature and to identify
steam binding and restore the operability of the system if it occurs.
The NRC may issue additional information as more inspection and analysis is
completed.
This information notice requires no specific action or written response. If
you have any questions about the information in this notice, please contact
one of the technical contacts listed below or the appropriate NRR project
manager.
Charles E. Rossi, Director
Division of Operational Events Assessment
Office of Nuclear Reactor Regulation
Technical Contacts: Eric W. Weiss, AEOD
(301) 492-9005 Roger Woodruff, NRR
(301) 492-1180
Attachments:
1. Dresden 2 - High-Pressure Coolant Injection Line
2. Referenced Generic Communications
3. List of Recently Issued NRC Information Notices
EAB: NRR IRB:AEOD TECH EDITOR EAB:NRR PM:PD32:NRR
- RWoodruff:db *EWeiss *RSanders *PBaranowsky *BSiegel
11/12/89 11/14/89 11/15/89 11/1§/89 11/15/89 C:PB1:RIII C:EAB:NRR C:OGCB:NRR D:06A.
- WShafer *CHaughney *CBerlinger CERossi DO
11/13/89 11/15/89 11/22/89 11/;1/89
I
NRCIN 88-xx
November x, 1988 monitoring the temperature of the pump discharge to ensure that it is at less
than saturation temperature and to identify steam binding if it occurs.
The NRC may issue additional information as more inspection and analysis is
completed.
No specific action or written response is required by this information
notice. If you have questions about this matter, please call one of the
technical contacts listed below or the Regional Administrator of the
appropriate regional office.
Charles E. Rossi, Director
Division of Operational Events Assessment
Office of Nuclear Reactor Regulation
Technical Contacts: Eric W. Weiss, AEOD
(301) 492-9005 Roger Woodruff, NRR
(301) 492-1180
Attachments: 1. Dresden 2 - High-Pressure Coolant Injection Line
2. List of Recently Issued Information Notices
EAB:NRR IRB:AEOD TECH EDITOR EAB:NRR PM:PD32:NRR
- RWoodruff:db *EWeiss PBaranomsky BSiegelrP
11/ /89 11/ /L6 11/15/89 11115189 Ko
C:PB1:RIII D:DOEA:NRR
11/ /89 1 /WY/89 11/ /89 Doc: 299A
4.1.d
NRCIN 88-xx
November x, 1988 temperature of the pump discharge to assure that it is at less than
saturation temperature and to identify steam binding if it occurs.
The NRC may issue additional information as more inspection and analysis is
completed.
No specific action or written response is required by this information
notice. If you have questions about this matter, please call one of the
technical contacts listed below or the Regional Administrator of the
appropriate regional office.
Charles E. Rossi. Director
Division of Operational Events Assessment
Office of Nuclear Reactor Regulation
Technical Contacts: Eric W. Weiss, AEOD
(301) 492-9005 Roger Woodruff, NRR
(301) 492-1180
Attachments: 1. Dresden 2 - High Pressure Coolant Injection Line
2. List of Recently Issued Information Notices
EAB:NRR IRB:AEOD TECH EDITOR EAB:NRR PM:PD32:NRR
RWoodruff:db EWei S PBaranowsky BSiegel
11/11189 11/1 /89 11/1ST/89 11/ /89 11/ /89
3BM tricpkoa~
C:PB1:RILI~ C:EAB:NRR C:OGCB:NRR D:DOEA:NRR
WShafer-Cd,' CHaughney CBerlinger CERossi
11/13/89 11/ /89 11/ /89 11/ /89
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list | - Information Notice 1989-01, Valve Body Erosion (4 January 1989)
- Information Notice 1989-02, Criminal Prosecution of Licensee'S Former President for Intentional Safety Violations (9 January 1989)
- Information Notice 1989-03, Potential Electrical Equipment Problems (11 January 1989)
- Information Notice 1989-04, Potential Problems from the Use of Space Heaters (17 January 1989)
- Information Notice 1989-05, Use of Deadly Force by Guards Protecting Nuclear Power Reactors Against Radiological Sabotage (19 January 1989)
- Information Notice 1989-06, Bent Anchor Bolts in Boiling Water Reactor Torus Supports (24 January 1989)
- Information Notice 1989-07, Failures of Small-Diameter Tubing in Control Air, Fuel Oil & Lube Oil Systems Render Emergency Diesel Generators Inoperable (25 January 1989, Topic: Overspeed trip)
- Information Notice 1989-08, Pump Damage Caused by Low-Flow Operation (26 January 1989)
- Information Notice 1989-09, Credit for Control Rods Without Scram Capability in the Calculation of Shutdown Margin (26 January 1989, Topic: Shutdown Margin)
- Information Notice 1989-10, Undetected Installation Errors in Main Steam Line Pipe Tunnel Differential Temperature-Sensing Elements at Boiling Water Reactors (27 January 1989)
- Information Notice 1989-11, Failure of DC Motor-Operated Valves to Develop Rated Torque Because of Improper Cable Sizing (2 February 1989, Topic: Shutdown Margin)
- Information Notice 1989-12, Dose Calibrator Quality Control (9 February 1989)
- Information Notice 1989-13, Alternative Waste Management Procedures in Case of Denial of Access to Low-Level Waste Disposal Sites (8 February 1989, Topic: Shutdown Margin, Authorized possession limits)
- Information Notice 1989-15, Second Reactor Coolant Pump Shaft Failure at Crystal River (16 February 1989, Topic: Shutdown Margin)
- Information Notice 1989-16, Excessive Voltage Drop in DC Systems (16 February 1989, Topic: Shutdown Margin, Battery sizing)
- Information Notice 1989-17, Contamination and Degradation of Safety-Related Battery Cells (22 February 1989)
- Information Notice 1989-18, Criminal Prosecution of Wrongdoing Committed by Suppliers of Nuclear Products or Services (24 August 1990)
- Information Notice 1989-20, Weld Failures in a Pump of Byron-Jackson Design (24 February 1989, Topic: Health Physics Network)
- Information Notice 1989-21, Changes in Performance Characteristics of Molded-Case Circuit Breakers (27 February 1989, Topic: Health Physics Network)
- Information Notice 1989-23, Environmental Qualification of Litton-Veam Cir Series Electrical Connectors (3 March 1989, Topic: Health Physics Network)
- Information Notice 1989-24, Nuclear Criticality Safety (6 March 1989, Topic: Health Physics Network)
- Information Notice 1989-25, Unauthorized Transfer of Ownership or Control of Licensed Activities (7 March 1989, Topic: Health Physics Network)
- Information Notice 1989-26, Instrument Air Supply to Safety-Related Equipment (7 March 1989, Topic: Health Physics Network)
- Information Notice 1989-27, Limitations on the Use of Waste Forms and High Integrity Containers for the Disposal of Low-Level Radioactive Waste (8 March 1989, Topic: Process Control Program)
- Information Notice 1989-28, Weight and Center of Gravity Discrepancies for Copes-Vulcan Air-Operated Valves (14 March 1989)
- Information Notice 1989-29, Potential Failure of Asea Brown Boveri Circuit Breakers During Seismic Event (15 March 1989)
- Information Notice 1989-30, High Temperature Environments at Nuclear Power Plants (1 November 1990)
- Information Notice 1989-31, Swelling and Cracking of Hafnium Control Rods (22 March 1989)
- Information Notice 1989-32, Surveillance Testing of Low-Temperature Overpressure-Protection Systems (23 March 1989, Topic: Stroke time)
- Information Notice 1989-33, Potential Failure of Westinghouse Steam Generator Tube Mechanical Plugs (23 March 1989)
- Information Notice 1989-34, Disposal of Americium Well-Logging Sources (30 March 1989)
- Information Notice 1989-35, Loss & Theft of Unsecured Licensed Material, Attachment 1 to NRC Information Notice 1990-014: Accidental Disposal of Radioactive Materials. (Also includes Attachments 2 & 3) (30 March 1989)
- Information Notice 1989-35, Loss & Theft of Unsecured Licensed Material, Attachment 1 to NRC Information Notice 1990-014: Accidental Disposal of Radioactive Materials. (Also Includes Attachments 2 & 3) (30 March 1989, Topic: Moisture-Density Gauge, Uranium Hexafluoride)
- Information Notice 1989-36, Excessive Temperatures in Emergency Core Cooling System Piping Located Outside Containment (4 April 1989)
- Information Notice 1989-37, Proposed Amendments to 40 CFR Part 61, Air Emission Standards for Radionuclides (4 April 1989)
- Information Notice 1989-38, Atmospheric Dump Valve Failures at Palo Verde Units 1, 2, and 3 (5 April 1989, Topic: Emergency Lighting)
- Information Notice 1989-39, List of Parties Excluded from Federal Procurement or Non-Procurement Programs (5 April 1989)
- Information Notice 1989-40, Unsatisfactory Operator Test Results and Their Effect on the Requalification Program (14 April 1989)
- Information Notice 1989-41, Operator Response to Pressurization of Low-Pressure Interfacing Systems (20 April 1989)
- Information Notice 1989-42, Failure of Rosemount Models 1153 and 1154 Transmitters (21 April 1989)
- Information Notice 1989-43, Permanent Deformation of Torque Switch Helical Springs in Limitorque SMA-Type Motor Operators (1 May 1989)
- Information Notice 1989-44, Hydrogen Storage on the Roof of the Control Room (27 April 1989, Topic: Coatings)
- Information Notice 1989-45, Metalclad, Low-Voltage Power Circuit Breakers Refurbished with Substandard Parts (8 May 1989, Topic: Commercial Grade Dedication, Coatings, Commercial Grade)
- Information Notice 1989-46, Confidentiality of Exercise Scenarios (11 May 1989, Topic: Coatings)
- Information Notice 1989-47, Potential Problems with Worn or Distorted Hose Clamps on Self-Contained Breathing Apparatus (18 May 1989, Topic: Coatings, Fatality)
- Information Notice 1989-48, Design Deficiency in the Turbine-Driven Auxiliary Feedwater Pump Cooling Water Systems (22 May 1989, Topic: Coatings, Temporary Modification)
- Information Notice 1989-49, Failure to Close Service Water Cross-Connect Isolation Valves (22 May 1989, Topic: Coatings)
- Information Notice 1989-50, Inadequate Emergency Diesel Generator Fuel Supply (30 May 1989)
- Information Notice 1989-51, Potential Loss of Required Shutdown Margin During Refueling Operations (31 May 1989, Topic: Shutdown Margin, Coatings)
- Information Notice 1989-52, Potential Fire Damper Operational Problems (8 June 1989, Topic: Safe Shutdown, Shutdown Margin, Fire Barrier, Fire Protection Program)
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