Undetected Failures That May Occur During Patient Treatments with Teletherapy DevicesML031050467 |
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, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant ![Entergy icon.png](/w/images/7/79/Entergy_icon.png) |
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Issue date: |
12/24/1996 |
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From: |
Cool D NRC/NMSS/IMNS |
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To: |
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References |
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IN-96-072, NUDOCS 9612310159 |
Download: ML031050467 (11) |
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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, 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 [[: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 [[:Fort Saint Vrain]] OR [[:Shoreham]] OR [[:Satsop]] OR [[:Trojan]] OR [[:Atlantic Nuclear Power Plant]] </code>. |
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UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS
WASHINGTON, D.C. 20555 December 24, 1996 NRC INFORMATION NOTICE 96-72: UNDETECTED FAILURES THAT MAY OCCUR
DURING PATIENT TREATMENTS WiTH
TELETHERAPY DEVICES
Addressees
All teletherapy licensees.
Purpose
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice to alert
addressees to a recently reported failure of an AECL Theratron 780 teletherapy device to
place the source in the exposure position during patient treatment, and the potential for
similar failures in all older AECL teletherapy devices that were manufactured prior to 1985.
These include the Theratron T765, T80, and T60 model numbers, and the Eldorado E78, E76, E8, and E6 model numbers. 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 contained in this information notice are not NRC requirements;
therefore, no specific action nor written response is required.
Description of Circumstances
On November 29, 1996, a licensee's teletherapy physicist notified NRC that he was
experiencing electrical problems with an AECL Theratron 780 teletherapy unit. On
November 27, 1996, the licensee's radiation therapy technologist observed that the cobalt-60
teletherapy source was not in the exposure (beam-on) position during a patient treatment, even though the treatment timer was running. The running treatment timer was an indication
of in-progress patient treatment. However, the beam-on indicator light was not illuminated, nor was the room radiation monitor indicating the presence of radiation. Thus, the
information provided by the operating treatment timer conflicted with that from both the
beam-on indicator and room radiation monitor. Upon observation of this problem, the
(OR t o+wrt 9 4- - 9(1'"
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IN 96-72 December 24, 1996 treatment was terminated by licensee staff. When the teletherapy physicist subsequently
evaluated the control panel operation he discovered a sporadic failure of the source to move
to the exposed position, despite normal operation of the treatment timer.
On December 2, 1996, a service representative from Therstronics International Corporation
arrived at the licensee's site. The service representative concluded that a loose wire
connection, between the timer and the solenoid driver circuit board, was causing a sporadic
circuit interruption which, in turn, prevented the activation of the driver necessary to move the
source into the exposed position. The control console lights were found to be functioning
normally; however, since the timer was not connected to any source position indicators, it
continued to run even though the source was not in the exposed patient treatment position.
Following repair of the loose wire connection to the circuit board the Theratronics service
representative determined the unit was fully operational.
The device subsequently failed again on December 9, 1996, in a manner similar to that of the
previously reported November 27, 1996, failure. This second failure has been attributed to a
faulty solenoid driver circuit board, which was replaced by the Theratronics service
representative. The first test of the unit, with the replacement circuit board in place, also
resulted in the same system failure. However, neither the service representative or
inspectors from both the Food and Drug Administration (FDA) and NRC have been able to
reproduce this latest failure following replacement of the circuit board. Thus, the root cause
of these failures has yet to be determined and efforts are continuing to make this
determination.
Discussion
Review of this incident reveals that the malfunctioning unit was an early model Theratron 780
using a single channel timer. These single channel timers can be of either mechanical or
digital designs. With this type of timer, originally installed on all AECL/Theratronics
teletherapy units built before 1985, patient treatments are initiated by starting the treatment
timer which, in turn, generates the signal to move the source to the exposed treatment
position. If, for any reason, the source fails to move to the exposed treatment position, the
timer will continue to run without interruption. This would result in the patient receiving less
than the intended dose for that treatment fraction. Additionally, this can occur not only upon
the initiation of treatment, but at any time the source exposure signal pathway is interrupted.
Potential harm to the patient could occur if the failure of the source to move to the fully
exposed treatment position is not observed, and subsequently corrected, by the licensee.
Since these older generation devices have this known single-point failure mode, it is
important that licensees be especially vigilant in monitoring all status information available on
the initiation, and throughout the course, of treatment. These would include not only the
K)
IN 96-72 December 24, 1996 the room radiation
timer count down, but the source position indicators and, if appropriate,does not necessarily mean
monitor alarm output. The illumination of the "Beam On" indicator
source is not in the fully
that the source is in the exposure position, but merely indicates the
shielded position.
channel timer units, the
For the older (prior to 1985) AECLUTheratron devices with single more recent design. Since
manufacturer presently offers a replacement dual channel timer of they may no longer carry
some of these units may have been refurbished by other vendors,concerning whether or not
the AECL/Theratronics identification. If you have any questions or refurbisher. The
your unit is susceptible to this failure, contact either your service provider
older single channel timers
replacement timer is designed to operate quite differently than the
installed, is likely that
it
it is intended to replace. Had this dual channel timer upgrade been position would
the failure of the device to move the source into the fully exposed treatment undetected patient
have been more readily detected by the licensee and the potential for
underexposures reduced.
NRC that it intends to notify
The vendor (Theratronics International Corporation) has informed of the potential
all its customers having these older single-timer units, advising them of this vendor's
problems and the vendors recommended corrective actions. A copy
vendor directly with
notification is attached (Attachment 1). Licensees should contact the
questions related to the notification.
replacement
Licensees should consider increasing their preventive maintenance procedures, such as these
of parts, and upgrading of components (when available) for older devices, life. When
teletherapy units, that may be approaching the end of their safe useful studies that indicate that
considering options, licensees may wish to consider human factors if one operational
people are poor at detecting intermittent or infrequent failures, particularly
others.
indicator, such as the treatment timer, is monitored more closely than
are now subject to
Licensees should also be aware that medical device user facilities devices. Information
mandatory FDA adverse event reporting requirements for medical by contacting the
concerning FDA's mandatory reporting requirements can be obtained and Biometrics, Division of
Center for Devices and Radiological Health, Office of Surveillance reporting requirements
Surveillance Systems at (301) 594-2735. Since the FDA mandatory on information
may not be applicable to all medical device events, FDA also depends recognize medical
voluntarily provided by device users because they are often the first to to the safety or
device related hazards. Any concerns that licensees may have pertaining reported to the FDA by
quality problems associated with medical devices can be voluntarily anonymously.
calling MedWatch at 1-800-FDA-1088. Voluntary reports can be submitted
IN 96-72 December 24, 1996 response. If you have any
This information notice requires no specific action nor written
technical contact listed
questions about the information in this notice, please contact the
below or the appropriate NRC regional office.
( I ol,D or
'D sion of Industrial and
Medical Nuclear Safety
Office of Nuclear Material Safety
and Safeguards
Technical Contact:
Robert L. Ayres, NMSS
(301) 415-5746 E-mail: rxal nrc.gov
Attachments:
1. Theratronics Customer Notification
2. List of Recently Issued NMSS Information Notices
3. List of Recently Issued NRC Information Notices
1# 4h 1{- J2 1 /ez
i
Attachment 1 IN 96-72 AY@ATTRONICSU R NC December 24, 1996
)W Intematonla Limred
December 10, 1996 Dear Theraton Customer, OF
SUBJECT: REMINDER FOR SINGLE-CHANNEL TIMER UNITS
PRECAUTIONS IN TflE OPERATOR'S MANUAL
Model:_
SIN:
timers, eier mechanical or digital.
Thratron units shipped prior to 1985 included single-channel
Both of these models are designed to begintheir timing sequence from the source-on comnmand
switches as in the more recent Theratron
rather than directly from the source transit drawer problem in the soure
or mechanical
models. With these older single-channel tmers, an electrical titme.
of treatment
mechanism, should it go unnoticed, could affect the accuracy
years and reports of problems have
Singlchannel timers have been in use for more than thirty
Users df units having single
been very rare with no reports of significant dose misadministration.
operating precautions:
channel timers, however, are reminded of the foLlowing standard
of the Source
1. As is explained in the Operator's Manual, observe the operion
and above thie treatment room door
Position indicator lights on the control console
while treatment is in progress.
nstructions ouidined in
2. Follow daily start-up procedures and periodic maintenance
the Operator's Manual, and investigate any problems promptly.
models, which will improve
Kits are available to install the current Dual Timer on older Theratronand delivery information at
price
timer accuracy and reliability. Please contact Tlheratronics for
1-800-826-2258 or 1-800-267-7230.
E.S. Maxtell
Vice President
Quality Assurance and Regulatory Affairs
413 March Road
P.O. Box 13140 O/
Kanata Ontario Canada ISOC9001a1994 n' Doi 0
21287
(613) 591-2100 Knatam Ontario. Canada
Fax 613 592-3816
Attachment 2 IN 96-72 December 24, 1996 Page 1 of I
LIST OF RECENTLY ISSUED
NMSS INFORMATION NOTICES
Information Date of
Subject Issuance Issued to
Notice No.
12/24/96 All U.S. Nuclear Regulatory
96-70 Year 2000 Effect on Computer
Commission licensees, certi- System Software
ficate holders, and regis- trants
Recent Misadministrations 12/13/96 All U.S. Nuclear Regulatory
96-66 Commission Medical Use
Caused by Incorrect Cali- Licensees authorized to use
brations of Strontium-90
strontium-90 eye applicators
Eye Applicators
Potential Safety Issue 12/05/96 All U.S. Nuclear Regulatory
96-63 Commission licensees
Regarding the Shipment
of Fissile Material authorized to possess special
nuclear material in unsealed
quantities greater than a
critical mass
Incident-Reporting Require- 10/30/96 All U.S. Nuclear Regulatory
96-57 Commission licensees
ments Involving Intakes, During a 24-Hour Period
that May Cause a Total
Effective Dose Equivalent
in Excess of 0.05 Sv (5 rem)
10/17/96 All material licensees
96-54 Vulnerability of Stainless
Steel to Corrosion When
Sensitized
10/15/96 All industrial radiography
96-53 Retrofit to Amersham 660
licensees
Posilock Radiography
Camera to Correct Incon- sistency in 10 CFR Part 34 Compatibility
09/26/96 All U.S. Nuclear Regulatory
96-52 Cracked Insertion Rods
Commission portable gauge
on Troxler Model 3400
Series Portable Moisture licensees and vendors
Density Gauges
N
Attachment 3 IN 96-72 December 24, 1996 LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
Information Date of
Subject Issuance Issued to
Notice No.
Licensee Response to Indi- 12/27/96 All holders of OLs
96-71 or CPs for nuclear
cations of Tampering, Van- power reactors
dalism, or Malicious Mis- chief
Year 2000 Effect on Computer 12/24/96 All U.S. Nuclear
96-70 Regulatory Commission
System Software
licensees, certificate
holders, and registrants
Operator Actions Affecting 12/20/96 All holders of OLs
96-69 or CPs for nuclear
Reactivity
power reactors
Incorrect Effective Diaphragm 12/19/96 All holders of OLs
96-68 or CPs for nuclear
Area Values in Vendor Manual
Result in Potential Failure power reactors
of Pneumatic Diaphragm
Actuators
Vulnerability of Emergency 12/19/96 All holders of OLs
96-67 Diesel Generators to Fuel or CPs for nuclear
Oil/Lubricating Oil Incom- power reactors
patibility
Recent Misadministrations 12/13/96 All U.S. Nuclear
96-66 Regulatory Commission
Caused by Incorrect Cali- brations of Strontium-90 Medical Use Licensees
Eye Applicators authorized to use
strontium-90 (Sr-90)
eye applicators
OL = Operating License
CP = Construction Permit
IIIN 96-72 December 24, 1996 This information notice requires no specific action nor written response. If you have any
questions about the information In this notice, please contact the technical contact listed
below or the appropriate NRC regional office.
Umgse1 Signed by 4 a~ ~
Donald A. Cool, Director v
- Division of Industrial and
Medical Nuclear Safety
Office of Nuclear Material Safety
and Safeguards
Technical Contact:
Robert L. Ayres, NMSS
(301) 415-5746 E-mail: rxal@nrc.gov
Attachments:
1. Theratronics Customer Notification
2. List of Recently Issued NMSS Information Notices
3. List of Recently Issued NRC Information Notices
OFC IMAB I I/ IMAB IMAB IMOB I
NAME R *SMerchant *LwCamper *JPiccone
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96-XX
~ December , 1996 Licensees should consider increasing their preventive maintenance procedures, older
replacement of parts, and upgrading of components (when available) forend of
devices, such as these teletherapy units, that may be approaching the
their safe useful life. When considering options, licensees may wish to
consider human factors studies that indicate that people are poor at detecting
intermittent or infrequent failures, particularly if one operational
indicator, such as the treatment timer, is monitored more closely than others.
Licensees should also be aware that medical device user facilities are now
subject to mandatory FDA adverse event reporting requirements for medicalcan be
devices. Information concerning FDA's mandatory reporting requirements
obtained by contacting the Center for Devices and Radiological Health, Office
of Surveillance and Biometrics, Division of Surveillance Systems at (301) 594-
2735. Since the FDA mandatory reporting requirements may not be applicable to
all medical device events, FDA also depends on information voluntarily
provided by device users because they are often the first to recognize medical
device related hazards. Any concerns that licensees may have pertaining to
the safety or quality problems associated with medical devices can be
voluntarily reported to the FDA by calling MedWatch at 1-800-FDA-1088.
Voluntary reports can be submitted anonymously.
This information notice requires no specific action nor written response. If
you have any questions about the information in this notice, please contact
the technical contact listed below or the appropriate NRC regional office.
Donald A. Cool, Director
Division of Industrial and
Medical Nuclear Safety
Office of Nuclear Material Safety
and Safeguards
Technical Contact:
Robert L. Ayres, NMSS
(301) 415-5746 E-mail: rxal~nrc.gov
Attachments:
1. Theratronics Customer Notification
2. List of Recently Issued NMSS Information Notices
3. List of Recently Issued NRC Information Notices
- Coordinated with FDA ===a
OFC
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IN 96-XX
December 1996 This information notice requires no specific action nor written response. If you
have any questions about the information in this notice, please contact the
technical contact listed below or the appropriate NRC regional office.
Donald A. Cool, Director
Division of Industrial and
Medical Nuclear Safety
Office of Nuclear Material Safety
and Safeguards
Technical Contact:
Robert L. Ayres, NMSS
(301) 415-5746 E-mail: rxal@nrc.gov
Attachments:
1. Theratronics Customer Notification
2. List of Recently Issued NMSS Information Notices
3. List of Recently Issued NRC Information Notices
OFC l IMAB IMABr lI l IMAB I l IMOB I l_ I
NAME Rayres *SMerchant*LWCamper JPiccone
DATE 12//e/96 12/17/96 12/17/96 12/ /96 _
OFI_ TpchFd I DD/IMNS I D/IMNS I I
WAME I *EKrause FCCombs DACool I
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IN 96-XX
December 1996 This information notice requires no specific action nor written response. If
you have any questions about the information in this notice, please contact
the technical contact listed below or the appropriate NRC regional office.
Donald A. Cool, Director
Division of Industrial and
Medical Nuclear Safety
Office of Nuclear Material Safety
and Safeguards
Technical Contact:
Robert L. Ayres, NMSS
(301) 415-5746 E-mail: rxal@nrc.gov
Attachments:
1. Theratronics Customer Notification
2. List of Recently Issued NMSS Information Notices
3. List of Recently Issued NRC Information Notices
- See previous concurrence A
OFC IMAB I "- IMAB 1l 8:Yw I ' IMOB I l
NAME Rayre s99i SMert~ (" Sy/dmper JPiccone
DATE 1 12//7/96
12/fl/96
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12/ /96
.
OFC TechEd I DD/IMNS I D/IMNS I I
NAME *EKrause FCCombs DACool I _ _ _
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DATE
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list | - Information Notice 1996-01, Potential For High Post-Accident Closed-Cycle Cooling Water Temperatures to Disable Equipment Important to Safety (3 January 1996)
- Information Notice 1996-01, Potential for High Post-Accident Closed-Cycle Cooling Water Temperatures to Disable Equipment Important to Safety (3 January 1996)
- Information Notice 1996-02, Inoperability of Power-Operated Relief Valves Masked by Downstream Indications During Testing (5 January 1996, Topic: Stroke time)
- Information Notice 1996-03, Main Steam Safety Valve Setpoint Variation as a Result of Thermal Effects (5 January 1996)
- Information Notice 1996-03, Main Steam Safety Valve Setpoint Variation As a Result of Thermal Effects (5 January 1996)
- Information Notice 1996-04, Incident Reporting Requirements for Radiography Licensees (10 January 1996, Topic: Brachytherapy, Overexposure, Depleted uranium)
- Information Notice 1996-05, Partial Bypass of Shutdown Cooling Flow from Reactor Vessel (18 January 1996, Topic: Reactor Vessel Water Level)
- Information Notice 1996-06, Design & Testing Deficiencies of Tornado Dampers at Nuclear Power Plants (25 January 1996)
- Information Notice 1996-07, Slow Five Percent Scram Insertion Times Caused by Viton Diaphragms in Scram Solenoid Pilot Valves (26 January 1996)
- Information Notice 1996-08, Thermally Induced Pressure Locking of a High Pressure Coolant Injection Gate Valve (5 February 1996, Topic: Anchor Darling, Cold shutdown justification)
- Information Notice 1996-09, Damage in Foreign Steam Generator Internals (12 February 1996, Topic: Earthquake)
- Information Notice 1996-10, Potential Blockage by Debris of Safety System Piping Which Is Not Used During Normal Operation or Tested During Surveillances (13 February 1996)
- Information Notice 1996-10, Potential Blockage by Debris of Safety System Piping Which is Not Used During Normal Operation or Tested During Surveillances (13 February 1996)
- Information Notice 1996-11, Ingress of Demineralizer Resins Increases Potential For Stress Corrosion Cracking of Control Rod Drive Mechanism Penetrations (14 February 1996)
- Information Notice 1996-11, Ingress of Demineralizer Resins Increases Potential for Stress Corrosion Cracking of Control Rod Drive Mechanism Penetrations (14 February 1996)
- Information Notice 1996-12, Control Rod Insertion Problems (15 February 1996)
- Information Notice 1996-13, Potential Containment Leak Paths Through Hydrogen Analysis (26 February 1996, Topic: Stress corrosion cracking, Integrated leak rate test)
- Information Notice 1996-14, Degradation of Radwaste Facility Equipment at Millstone Nuclear Power Station, Unit 1 (1 March 1996)
- Information Notice 1996-15, Unexpected Plant Performance During Performance of New Surveillance (8 March 1996)
- Information Notice 1996-16, BWR Operation with Indicated Flow Less than Natural Circulation (14 March 1996, Topic: Stress corrosion cracking)
- Information Notice 1996-17, Reactor Operation Inconsistent with the Updated Final Safety Analysis Report (18 March 1996)
- Information Notice 1996-18, Compliance with 10 CFR Part 20 for Airborne Thorium (25 March 1996, Topic: Stress corrosion cracking, Brachytherapy)
- Information Notice 1996-19, Failure of Tone Alert Radios to Activate When Receiving a Shortened Activation Signal (2 April 1996, Topic: Tone Alert Radio, Siren)
- Information Notice 1996-20, Demonstration of Associated Equipment Compliance with 10 CFR 34.20 (4 April 1996, Topic: Brachytherapy)
- Information Notice 1996-21, Safety Concerns Related to the Design of the Door Interlock Circuit on Nucletron High-Dose Rate and Pulsed Dose Rate Remote Afterloading Brachytherapy Devices (10 April 1996, Topic: Brachytherapy)
- Information Notice 1996-22, Improper Equipment Settings Due to Use of Nontemperature-Compensated Test Equipment (11 April 1996, Topic: Brachytherapy)
- Information Notice 1996-23, Fires in Emergency Diesel Generator Exciters During Operation Following Undetected Fuse Blowing (22 April 1996, Topic: Brachytherapy, Overspeed trip)
- Information Notice 1996-24, Preconditioning of Molded-Case Circuit Breakers Before Surveillance Testing (25 April 1996, Topic: Brachytherapy)
- Information Notice 1996-25, Traversing In-Core Probe Overwithdrawn at Lasalle County Station, Unit 1 (30 April 1996, Topic: Brachytherapy)
- Information Notice 1996-26, Recent Problems with Overhead Cranes (30 April 1996, Topic: Brachytherapy)
- Information Notice 1996-26, Recent Problems With Overhead Cranes (30 April 1996)
- Information Notice 1996-27, Potential Clogging of High Pressure Safety Injection Throttle Valves During Recirculation (1 May 1996, Topic: Brachytherapy)
- Information Notice 1996-28, Suggested Guidance Relating to Development and Implementation of Corrective Action (1 May 1996, Topic: Brachytherapy)
- Information Notice 1996-29, Requirements in 10 CFR Part 21 for Reporting and Evaluating Software Errors (20 May 1996, Topic: Brachytherapy)
- Information Notice 1996-30, Inaccuracy of Diagnostic Equipment for Motor-Operated Butterfly Valves (21 May 1996)
- Information Notice 1996-31, Cross-Tied Safety Injection Accumulators (22 May 1996)
- Information Notice 1996-32, Implementation of 10 CFR 50.55a(g) (6) (II) (A), Augmented Examination of Reactor Vessel (5 June 1996, Topic: Non-Destructive Examination)
- Information Notice 1996-32, Implementation of 10 CFR 50.55a(g) (6) (ii) (A), Augmented Examination of Reactor Vessel (5 June 1996, Topic: Non-Destructive Examination)
- Information Notice 1996-33, Erroneous Data From Defective Thermocouple Results in a Fire (24 May 1996, Topic: Reverse polarity)
- Information Notice 1996-33, Erroneous Data from Defective Thermocouple Results in a Fire (24 May 1996, Topic: Reverse polarity)
- Information Notice 1996-34, Hydrogen Gas Ignition During Closure Welding of a VSC-24 Multi-Assembly Sealed Basket (31 May 1996)
- Information Notice 1996-35, Failure of Safety Systems on Self-Shielded Irradiators Because of Inadequate Maintenance and Training (11 June 1996)
- Information Notice 1996-36, Degradation of Cooling Water Systems Due to Icing (12 June 1996, Topic: High winds, Ultimate heat sink, Frazil ice)
- Information Notice 1996-37, Inaccurate Reactor Water Level Indication and Inadvertent Draindown During Shutdown (18 June 1996, Topic: Reactor Vessel Water Level)
- Information Notice 1996-38, Results of Steam Generator Tube Examinations (21 June 1996, Topic: Stress corrosion cracking)
- Information Notice 1996-39, Estimates of Decay Heat Using ANS 5.1 Decay Heat Standard May Vary Significantly (5 July 1996)
- Information Notice 1996-40, Defciencies in Material Dedication and Procurement Practices and in Audits of Vendors (7 October 1996, Topic: Coatings, Troxler Moisture Density Gauge)
- Information Notice 1996-41, Effects of a Decrease in Feedwater Temperature on Nuclear Instrumentation (26 July 1996, Topic: Feedwater Heater)
- Information Notice 1996-42, Unexpected Opening of Multiple Safety Relief Valves (5 August 1996, Topic: Reactor Vessel Water Level)
- Information Notice 1996-43, Failures of General Electric Magne-Blast Circuit Breakers (2 August 1996)
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