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| issue date = 01/14/1993 | | issue date = 01/14/1993 | ||
| title = Locking of Radiography Exposure Devices | | title = Locking of Radiography Exposure Devices | ||
| author name = Cunningham R | | author name = Cunningham R | ||
| author affiliation = NRC/NMSS/IMNS | | author affiliation = NRC/NMSS/IMNS | ||
| addressee name = | | addressee name = | ||
Line 15: | Line 15: | ||
| page count = 9 | | page count = 9 | ||
}} | }} | ||
{{#Wiki_filter:}} | {{#Wiki_filter:UNITED STATES | ||
NUCLEAR REGULATORY COMMISSION | |||
OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS | |||
WASHINGTON, D.C. 20555 January 14, 1993 NRC INFORMATION NOTICE NO. 93-05: LOCKING OF RADIOGRAPHY EXPOSURE | |||
DEVICES | |||
==Addressees== | |||
: | |||
All Nuclear Regulatory Commission industrial radiography licensees | |||
==Purpose== | |||
This information notice is intended to: (a) alert licensees that the locking | |||
mechanisms on certain industrial radiography exposure devices can be locked | |||
with the sealed source in the exposed position; and (b) emphasize the | |||
importance of ensuring that the source is secure in a shielded position before | |||
moving the device. We expect that licensees will review this notice, distribute it to responsible staff, and consider actions, if appropriate, to | |||
verify that the source is properly secured at the conclusion of radiographic | |||
operations. However, suggestions contained in this notice do not constitute | |||
any new NRC requirements, and no written response is required. | |||
==Description of Circumstances== | |||
Case 1: A radiographer was overexposed in an incident involving a | |||
disconnected source when he failed to conduct a survey after each exposure. | |||
After investigating the incident, it was discovered that the radiographer had | |||
approached the device without a survey instrument, locked the device, disassembled the source guide tube, and left the drive controls connected | |||
before moving the device from one location to another. The radiographer had | |||
incorrectly assumed that in locking the exposure device, he had secured the | |||
source in a shielded position. In fact, the sealed source remained in the | |||
guide tube because the pigtail had disconnected from the drive cable. The | |||
radiographer's error was further compounded when the drive cable was not | |||
removed before moving the device, which would have allowed him to identify the | |||
absence of the source pigtail within the shielded assembly. | |||
Case 2: A radiographer was performing radiographic exposures of welds on a | |||
series of pipelines that were located approximately 6.1 meters (20 feet) above | |||
ground. The radiographer used a 1.8-meter (6-foot) guide tube with collimator | |||
and a 7.6-meter (25-foot) control cable. The radiographer hung the device | |||
from the pipeline to perform the work with the control cables hanging down to | |||
the ground. After an exposure, the radiographer retracted the source, placed | |||
the control cables on the ground, and used a hydraulic lift to get to the | |||
camera. | |||
9301080120 C L4'6 fD | |||
fe -2?- 0A | |||
Ik | |||
Cct | |||
IN 93-05 January 14, 1993 Because the camera was suspended above the lift, the radiographer | |||
the camera to reach the locking mechanism. He moved the camera had to move | |||
the control cables with his right hand and locking the camera by grasping | |||
hand. He continued with his left hand to disconnect the guide with his left | |||
camera. At this point, he noticed that the sealed source was tube from the | |||
approximately 10 centimeters (4 inches) from the camera port. protruding | |||
alarming ratemeter did not sound because it was not turned on. (Note: His | |||
of 10 CFR 34.33, which can result in a civil penalty, is addressed This violation | |||
Information Notice 91-49: "Enforcement of Safety Requirements in | |||
Radiographers"). for | |||
Reenactments of the incident showed that when the radiographer | |||
device, the crank handle could drag on the ground, exposing turned the | |||
the | |||
The radiographer was then able to lock the device over the drive sealed source. | |||
the sealed source protruding approximately 10 centimeters (4 cable, with | |||
inches). | |||
Analysis of the locking mechanism after the event did not identify | |||
defects with the mechanism. Tests performed showed that the any obvious | |||
still be locked with the source in the exposed position. device could | |||
NRC Evaluation: | |||
The findings in both of these cases raised concern among NRC | |||
certain conditions, radiographers could have false confidence staff that, under | |||
mechanisms. If exposure devices can lock when the source is in the locking | |||
shielded position, then radiographers could incorrectly believeoutside of the | |||
protected from exposure when, in fact, the source is not in that they are | |||
its | |||
position. We are also concerned that exposure devices are moved fully shielded | |||
drive cables are still connected. while the | |||
To evaluate the effectiveness of the locking mechanism on | |||
radiography exposure | |||
devices and to determine whether radiographers commonly move | |||
drive cables still connected, NRC inspectors observed licenseethe devices with | |||
and interviewed radiography personnel. From the data collected,equipment tests | |||
that a majority of exposure devices can be locked when the source we determined | |||
variety of positions, rather than only when the source pigtail is in a | |||
seated, with the source in the fully shielded position. Many is properly | |||
include a "locking ball," designed to prevent the source from source pigtails | |||
when the lock is engaged; however, our observations show that moving forward | |||
devices may be locked both when the source is not fully retractedsome exposure | |||
the drive cable is seated under the locking pin, thereby circumventing and while | |||
locking-ball feature. This may result in a source being positioned the | |||
is not fully shielded. where it | |||
Many radiographers acknowledged to NRC inspectors that they | |||
often leave drive | |||
cables connected when moving an exposure device from one location | |||
at temporary job sites. In addition, some acknowledged leaving to another | |||
connected. One licensee stated that this practice had resulted the guide tube | |||
being forced out of the exposure device while the device was in a source | |||
carried to a new | |||
location at a temporary job site. This licensee noted that | |||
the device was | |||
locked at the time, but the source had not been fully retracted | |||
the device. before locking | |||
Attachment 1 IN 93-05 January 14, 1993 LIST OF RECENTLY ISSUED | |||
NMSS INFORMATION NOTICES | |||
Information Date of | |||
Notice No. Subject Issuance Issued to | |||
93-04 Investigation and Re- 01/07/93 All U.S. Nuclear Regulatory | |||
porting of Misadministra- Commission medical | |||
tions by the Radiation licensees. | |||
Safety Officer | |||
93-03 Recent Revision to 01/05/93 All byproduct, source, and | |||
10 CFR Part 20 and special nuclear material | |||
Change of Implementa- licensees. | |||
tion Date to | |||
January 1, 1994 | |||
92-84 Release of Patients 12/17/92 All Nuclear Regulatory Com- Treated with Temporary mission Medical Licensees. | |||
Implants | |||
92-72 Employee Training 10/18/92 All U.S. Nuclear Regulatory | |||
and Shipper Registra- Commission Licensees. | |||
tion Requirements for | |||
Transporting Radioactive | |||
Materials | |||
92-62 Emergency Response 08/24/92 All U.S. Nuclear Regulatory | |||
Information Require- Commission Licensees. | |||
ments for Radioactive | |||
Material Shipments | |||
92-58 Uranium Hexafluoride 08/12/92 All fuel cycle licensees. | |||
Cylinders - Deviations | |||
in Coupling Welds | |||
92-38 Implementation Date for 05/12/92 All holders of OLs or CPs | |||
the Revision to the EPA for nuclear power reactors, Manual of Protective non-power reactors and | |||
Action Guides and Pro- materials licensees author- tective Actions for ized to possess large | |||
Nuclear Incidents quantities of radioactive | |||
material. | |||
92-37 Implementation of the 05/08/92 All Nuclear Regulatory | |||
Deliberate Misconduct Rule Commission Licensees. | |||
Attachment 2 IN 93-05 January 14, 1993 LIST OF RECENTLY ISSUED | |||
NRC INFORMATION NOTICES | |||
Information Date of | |||
Notice No. Subject Issuance Issued to | |||
93-04 Investigation and Re- 01/07/93 All U.S. Nuclear Regulatory | |||
porting of Misadministra- Commission medical | |||
tions by the Radiation licensees. | |||
Safety Officer | |||
93-03 Recent Revision to 01/05/93 All byproduct, source, and | |||
10 CFR Part 20 and special nuclear material | |||
Change of Implementa- licensees. | |||
tion Date to | |||
January 1, 1994 | |||
93-02 Malfunction of A Pres- 01/04/93 All holders of OLs or CPs | |||
surizer Code Safety for nuclear power reactors. | |||
Valve | |||
93-01 Accuracy of Motor- 01/04/93 All holders of OLs or CPs | |||
Operated Valve Diagnostic for nuclear power reactors. | |||
Equipment Manufactures | |||
by Liberty Technologies | |||
92-86 Unexpected Restriction 12/24/92 All holders of OLs or CPs | |||
to Thermal Growth of for nuclear power reactors. | |||
Reactor Coolant Piping | |||
92-85 Potential Failures of 12/23/92 All holders of OLs or CPs | |||
Emergency Core Cooling for nuclear power reactors. | |||
Systems Caused by | |||
Foreign Material Blockage | |||
92-84 Release of Patients 12/17/92 All Nuclear Regulatory | |||
Treated with Temporary Commission Medical Licensees | |||
Implants | |||
88-23, Potential for Gas 12/18/92 All holders of OLs or CPs | |||
Supp. 4 Binding of High-Pres- for nuclear power reactors. | |||
sure Safety Injection | |||
Pumps during A Design | |||
Basis Accident | |||
OL = Operating License | |||
CP = Construction Permit | |||
K) | |||
IN 93-05 January 14, 1993 Discussion: | |||
All licensees are reminded of the importance of ensuring that the sources used | |||
in radiography exposure devices are properly secured and fully shielded before | |||
moving the device. Radiographic exposure devices manufactured and new | |||
equipment acquired by licensees after January 10, 1992, must meet new design | |||
requirements in 10 CFR 34.20. These require that, among other safety | |||
features, the device must automatically secure the source assembly when it is | |||
cranked back into the fully shielded position within the device. However, many radiographic exposure devices currently in use do not include the newer | |||
safety features, and licensees are not required to use devices that comply | |||
with 10 CFR 34.20 requirements until after January 10, 1996. Certaih | |||
radiogiraphv exposure devices still in use today may be able to be locked with | |||
the source in the exposed position. | |||
Experience has shown that when an older exposure device is in use, the locking | |||
mechanism is not an indicator that the source is fully retracted and secured. | |||
The use of engineered safety features, like the lock mechanism, MUST BE | |||
coupled with a proper survey (10 CFR 34.43) AND use of an alarm ratemeter | |||
(10 CFR 34.33), to prevent the unintentional exposure of personnel. Surveys | |||
must be sufficient to detect a change in exposure readings taken at the source | |||
tube outlet, to determine whether the source is fully retracted to a shielded | |||
position (10 CFR 34.43). Alarm ratemeters serve as an additional warning | |||
method. Additionally, it is recommended that radiographers disassemble the | |||
source guide tube, remove the drive controls, and install the safety plugs or | |||
covers, before moving the radiography exposure device to another location. | |||
The failure to do so has been identified as a contributing factor in the | |||
unintended exposure of personnel, as well as in incidents where radiographers | |||
failed to notice that the source was not retracted into the device. | |||
Sealed sources for radiography are capable of delivering significant exposures | |||
to radiography personnel and to members of the general public, when handled by | |||
individuals who are inattentive to radiation safety procedures. It is | |||
recommended that all workers understand the consequences of improperly | |||
handling radiographic devices, and that workers be encouraged to use necessary | |||
precautions when working with these devices. | |||
IN 93-05 January 14, 1993 No written response is required by this information notice. If you have any | |||
questions about this matter, please contact the appropriate NRC regional | |||
office or the personnel listed below. | |||
( Richard E. Cunningham, Director | |||
Division Industrial and | |||
Medical Nuclear Safety, NMSS | |||
Technical contacts: Gary Shear, Region III | |||
(708) 790-5620 | |||
Charles Cain, Region IV | |||
(817) 860-8186 Scott Moore, NMSS | |||
(301) 504-2514 Attachments:. | |||
1. List of Recently Issued NMSS Information Notices | |||
2. List of Recently Issued NRC Information Notices | |||
IN 93-05 January 14, 1993 No written response is required by this information notice. If you have any | |||
questions about this matter, please contact the appropriate NRC regional | |||
office or the personnel listed below. | |||
Richard E. Cunningham, Director | |||
Division Industrial and | |||
Medical Nuclear Safety, NMSS | |||
Technical contacts: Gary Shear, Region III | |||
(708) 790-5620 | |||
Charles Cain, Region IV | |||
(817) 860-8186 Scott Moore, NMSS | |||
(301) 504-2514 Attachments: | |||
1. List of Recently Issued NMSS Information Notices | |||
2. List of Recently Issued NRC Information Notices | |||
* = see Drevious concurrence | |||
OFC IMOB I E NMSS I | |||
N IMOB EIMABe n | |||
NAME *SMoore/sm/11 *EKraus *CJones *JGlenn | |||
DATE 11/30/92 10/19/92 12/08/92 12/09/92 OFC SCDB I E IMOB IMOB l El IMNS IMNS | |||
NAME *CHaughney *KRamsey *FCombs *JGreeves *RECunningham | |||
DATE 12/10/92 1 01/05/93 1 12/08/92 01/06/93 01/07/93 C: COVER E: COVER & ENCL. N: NO COPY | |||
OFFICIAL RECORD COPY: | |||
DOCUMENT NAME: 93-05.IN | |||
IN 93- January , 1993 No written response is required by this information notice. If you have any | |||
questions about this matter, please contact the appropriate NRC regional | |||
office or the personnel listed below. | |||
Richard E. Cunningham, Director | |||
Division Industrial and | |||
Medical Nuclear Safety, NMSS | |||
Technical Contacts: Gary Shear, Region III | |||
708-790-562C | |||
Charles Cain, Region IV | |||
817-860-8186 Scott Moore, NMSS | |||
301-504-2514 Attachments: | |||
1. List of Recently Issued NMSS Information Notices | |||
2. List of Recently Issued NRC Information Notices | |||
* - caP nyVauiniiC anlnlnrranra | |||
- F Fe y 9- . .. _ | |||
OFC IMOB I E NMSS I Nj IMOB I E IMAB l | |||
NAME *SMoore/sm/l1 *EKraus *CJones *JGlenn | |||
nATr | |||
Unsu I 11 12n iog IllnQ/I2 II-IU | |||
12/08/92 | |||
- ~ - ~ -v-S ~ ~ 12/09/92 | |||
- -r~ | |||
OFC SCDB I E IMOB , IM0B I E IMNS _ NS | |||
NAME *CHaughney KRamsey K 4 *FCombs y | |||
Aves ham | |||
DATE 12/10/92 I/ 3 ,f | |||
E 91q 12/8/92 ____I/ 3 ___ I___ / a :_I | |||
C: COVER E: COVER & LNCL. N: NU WLI | |||
OFFICIAL RECORD COPY: G:LOCKING.SWM | |||
IN 92- December , 1992 No written response is required by this information notice. If you have any | |||
questions about this matter, please contact the appropriate NRC regional | |||
office or the personnel listed below. | |||
Richard E. Cunningham, Director | |||
Division Industrial and | |||
Medical Nuclear Safety, NMSS | |||
Technical Contacts: Gary Shear, Region III | |||
708-790-5620 | |||
\m Charles Cain, Region IV | |||
817-860-8186 cott Moore, NMSS | |||
01-504-2514 Attachments: | |||
1. List of Recently Issued NHSS Information Notices | |||
2. List of Recently Issued NR nformation Notices | |||
OFC HQ IEI M A INI -AIEI AB IA | |||
NAME ro I _I ______I____/_ I_____ | |||
DATE ii/o30/92 10/19/92 /A/I/92\ 6 I,9I1/92 OFC SCDB IM Io I MNS | |||
IIi IMNS | |||
NAME CH ge KRamsey = xJGreeves | |||
Uo X RECunninghim | |||
DATE It/la /92 j9/ /92 81I /_/92 _2 | |||
//92_ | |||
C: COVER E: COVER & ENCL. N: NO COPY | |||
OFFICIAL RECORD COPY: G:LOCKING.SWM}} | |||
{{Information notice-Nav}} | {{Information notice-Nav}} |
Latest revision as of 04:19, 24 November 2019
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS
WASHINGTON, D.C. 20555 January 14, 1993 NRC INFORMATION NOTICE NO. 93-05: LOCKING OF RADIOGRAPHY EXPOSURE
DEVICES
Addressees
All Nuclear Regulatory Commission industrial radiography licensees
Purpose
This information notice is intended to: (a) alert licensees that the locking
mechanisms on certain industrial radiography exposure devices can be locked
with the sealed source in the exposed position; and (b) emphasize the
importance of ensuring that the source is secure in a shielded position before
moving the device. We expect that licensees will review this notice, distribute it to responsible staff, and consider actions, if appropriate, to
verify that the source is properly secured at the conclusion of radiographic
operations. However, suggestions contained in this notice do not constitute
any new NRC requirements, and no written response is required.
Description of Circumstances
Case 1: A radiographer was overexposed in an incident involving a
disconnected source when he failed to conduct a survey after each exposure.
After investigating the incident, it was discovered that the radiographer had
approached the device without a survey instrument, locked the device, disassembled the source guide tube, and left the drive controls connected
before moving the device from one location to another. The radiographer had
incorrectly assumed that in locking the exposure device, he had secured the
source in a shielded position. In fact, the sealed source remained in the
guide tube because the pigtail had disconnected from the drive cable. The
radiographer's error was further compounded when the drive cable was not
removed before moving the device, which would have allowed him to identify the
absence of the source pigtail within the shielded assembly.
Case 2: A radiographer was performing radiographic exposures of welds on a
series of pipelines that were located approximately 6.1 meters (20 feet) above
ground. The radiographer used a 1.8-meter (6-foot) guide tube with collimator
and a 7.6-meter (25-foot) control cable. The radiographer hung the device
from the pipeline to perform the work with the control cables hanging down to
the ground. After an exposure, the radiographer retracted the source, placed
the control cables on the ground, and used a hydraulic lift to get to the
camera.
9301080120 C L4'6 fD
fe -2?- 0A
Ik
Cct
IN 93-05 January 14, 1993 Because the camera was suspended above the lift, the radiographer
the camera to reach the locking mechanism. He moved the camera had to move
the control cables with his right hand and locking the camera by grasping
hand. He continued with his left hand to disconnect the guide with his left
camera. At this point, he noticed that the sealed source was tube from the
approximately 10 centimeters (4 inches) from the camera port. protruding
alarming ratemeter did not sound because it was not turned on. (Note: His
of 10 CFR 34.33, which can result in a civil penalty, is addressed This violation
Information Notice 91-49: "Enforcement of Safety Requirements in
Radiographers"). for
Reenactments of the incident showed that when the radiographer
device, the crank handle could drag on the ground, exposing turned the
the
The radiographer was then able to lock the device over the drive sealed source.
the sealed source protruding approximately 10 centimeters (4 cable, with
inches).
Analysis of the locking mechanism after the event did not identify
defects with the mechanism. Tests performed showed that the any obvious
still be locked with the source in the exposed position. device could
NRC Evaluation:
The findings in both of these cases raised concern among NRC
certain conditions, radiographers could have false confidence staff that, under
mechanisms. If exposure devices can lock when the source is in the locking
shielded position, then radiographers could incorrectly believeoutside of the
protected from exposure when, in fact, the source is not in that they are
its
position. We are also concerned that exposure devices are moved fully shielded
drive cables are still connected. while the
To evaluate the effectiveness of the locking mechanism on
radiography exposure
devices and to determine whether radiographers commonly move
drive cables still connected, NRC inspectors observed licenseethe devices with
and interviewed radiography personnel. From the data collected,equipment tests
that a majority of exposure devices can be locked when the source we determined
variety of positions, rather than only when the source pigtail is in a
seated, with the source in the fully shielded position. Many is properly
include a "locking ball," designed to prevent the source from source pigtails
when the lock is engaged; however, our observations show that moving forward
devices may be locked both when the source is not fully retractedsome exposure
the drive cable is seated under the locking pin, thereby circumventing and while
locking-ball feature. This may result in a source being positioned the
is not fully shielded. where it
Many radiographers acknowledged to NRC inspectors that they
often leave drive
cables connected when moving an exposure device from one location
at temporary job sites. In addition, some acknowledged leaving to another
connected. One licensee stated that this practice had resulted the guide tube
being forced out of the exposure device while the device was in a source
carried to a new
location at a temporary job site. This licensee noted that
the device was
locked at the time, but the source had not been fully retracted
the device. before locking
Attachment 1 IN 93-05 January 14, 1993 LIST OF RECENTLY ISSUED
NMSS INFORMATION NOTICES
Information Date of
Notice No. Subject Issuance Issued to
93-04 Investigation and Re- 01/07/93 All U.S. Nuclear Regulatory
porting of Misadministra- Commission medical
tions by the Radiation licensees.
Safety Officer
93-03 Recent Revision to 01/05/93 All byproduct, source, and
10 CFR Part 20 and special nuclear material
Change of Implementa- licensees.
tion Date to
January 1, 1994
92-84 Release of Patients 12/17/92 All Nuclear Regulatory Com- Treated with Temporary mission Medical Licensees.
Implants
92-72 Employee Training 10/18/92 All U.S. Nuclear Regulatory
and Shipper Registra- Commission Licensees.
tion Requirements for
Transporting Radioactive
Materials
92-62 Emergency Response 08/24/92 All U.S. Nuclear Regulatory
Information Require- Commission Licensees.
ments for Radioactive
Material Shipments
92-58 Uranium Hexafluoride 08/12/92 All fuel cycle licensees.
Cylinders - Deviations
in Coupling Welds
92-38 Implementation Date for 05/12/92 All holders of OLs or CPs
the Revision to the EPA for nuclear power reactors, Manual of Protective non-power reactors and
Action Guides and Pro- materials licensees author- tective Actions for ized to possess large
Nuclear Incidents quantities of radioactive
material.
92-37 Implementation of the 05/08/92 All Nuclear Regulatory
Deliberate Misconduct Rule Commission Licensees.
Attachment 2 IN 93-05 January 14, 1993 LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
Information Date of
Notice No. Subject Issuance Issued to
93-04 Investigation and Re- 01/07/93 All U.S. Nuclear Regulatory
porting of Misadministra- Commission medical
tions by the Radiation licensees.
Safety Officer
93-03 Recent Revision to 01/05/93 All byproduct, source, and
10 CFR Part 20 and special nuclear material
Change of Implementa- licensees.
tion Date to
January 1, 1994
93-02 Malfunction of A Pres- 01/04/93 All holders of OLs or CPs
surizer Code Safety for nuclear power reactors.
Valve
93-01 Accuracy of Motor- 01/04/93 All holders of OLs or CPs
Operated Valve Diagnostic for nuclear power reactors.
Equipment Manufactures
by Liberty Technologies
92-86 Unexpected Restriction 12/24/92 All holders of OLs or CPs
to Thermal Growth of for nuclear power reactors.
Reactor Coolant Piping
92-85 Potential Failures of 12/23/92 All holders of OLs or CPs
Emergency Core Cooling for nuclear power reactors.
Systems Caused by
Foreign Material Blockage
92-84 Release of Patients 12/17/92 All Nuclear Regulatory
Treated with Temporary Commission Medical Licensees
Implants
88-23, Potential for Gas 12/18/92 All holders of OLs or CPs
Supp. 4 Binding of High-Pres- for nuclear power reactors.
sure Safety Injection
Pumps during A Design
Basis Accident
OL = Operating License
CP = Construction Permit
K)
IN 93-05 January 14, 1993 Discussion:
All licensees are reminded of the importance of ensuring that the sources used
in radiography exposure devices are properly secured and fully shielded before
moving the device. Radiographic exposure devices manufactured and new
equipment acquired by licensees after January 10, 1992, must meet new design
requirements in 10 CFR 34.20. These require that, among other safety
features, the device must automatically secure the source assembly when it is
cranked back into the fully shielded position within the device. However, many radiographic exposure devices currently in use do not include the newer
safety features, and licensees are not required to use devices that comply
with 10 CFR 34.20 requirements until after January 10, 1996. Certaih
radiogiraphv exposure devices still in use today may be able to be locked with
the source in the exposed position.
Experience has shown that when an older exposure device is in use, the locking
mechanism is not an indicator that the source is fully retracted and secured.
The use of engineered safety features, like the lock mechanism, MUST BE
coupled with a proper survey (10 CFR 34.43) AND use of an alarm ratemeter
(10 CFR 34.33), to prevent the unintentional exposure of personnel. Surveys
must be sufficient to detect a change in exposure readings taken at the source
tube outlet, to determine whether the source is fully retracted to a shielded
position (10 CFR 34.43). Alarm ratemeters serve as an additional warning
method. Additionally, it is recommended that radiographers disassemble the
source guide tube, remove the drive controls, and install the safety plugs or
covers, before moving the radiography exposure device to another location.
The failure to do so has been identified as a contributing factor in the
unintended exposure of personnel, as well as in incidents where radiographers
failed to notice that the source was not retracted into the device.
Sealed sources for radiography are capable of delivering significant exposures
to radiography personnel and to members of the general public, when handled by
individuals who are inattentive to radiation safety procedures. It is
recommended that all workers understand the consequences of improperly
handling radiographic devices, and that workers be encouraged to use necessary
precautions when working with these devices.
IN 93-05 January 14, 1993 No written response is required by this information notice. If you have any
questions about this matter, please contact the appropriate NRC regional
office or the personnel listed below.
( Richard E. Cunningham, Director
Division Industrial and
Medical Nuclear Safety, NMSS
Technical contacts: Gary Shear, Region III
(708) 790-5620
Charles Cain, Region IV
(817) 860-8186 Scott Moore, NMSS
(301) 504-2514 Attachments:.
1. List of Recently Issued NMSS Information Notices
2. List of Recently Issued NRC Information Notices
IN 93-05 January 14, 1993 No written response is required by this information notice. If you have any
questions about this matter, please contact the appropriate NRC regional
office or the personnel listed below.
Richard E. Cunningham, Director
Division Industrial and
Medical Nuclear Safety, NMSS
Technical contacts: Gary Shear, Region III
(708) 790-5620
Charles Cain, Region IV
(817) 860-8186 Scott Moore, NMSS
(301) 504-2514 Attachments:
1. List of Recently Issued NMSS Information Notices
2. List of Recently Issued NRC Information Notices
- = see Drevious concurrence
OFC IMOB I E NMSS I
N IMOB EIMABe n
NAME *SMoore/sm/11 *EKraus *CJones *JGlenn
DATE 11/30/92 10/19/92 12/08/92 12/09/92 OFC SCDB I E IMOB IMOB l El IMNS IMNS
NAME *CHaughney *KRamsey *FCombs *JGreeves *RECunningham
DATE 12/10/92 1 01/05/93 1 12/08/92 01/06/93 01/07/93 C: COVER E: COVER & ENCL. N: NO COPY
OFFICIAL RECORD COPY:
DOCUMENT NAME: 93-05.IN
IN 93- January , 1993 No written response is required by this information notice. If you have any
questions about this matter, please contact the appropriate NRC regional
office or the personnel listed below.
Richard E. Cunningham, Director
Division Industrial and
Medical Nuclear Safety, NMSS
Technical Contacts: Gary Shear, Region III
708-790-562C
Charles Cain, Region IV
817-860-8186 Scott Moore, NMSS
301-504-2514 Attachments:
1. List of Recently Issued NMSS Information Notices
2. List of Recently Issued NRC Information Notices
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- F Fe y 9- . .. _
OFC IMOB I E NMSS I Nj IMOB I E IMAB l
NAME *SMoore/sm/l1 *EKraus *CJones *JGlenn
nATr
Unsu I 11 12n iog IllnQ/I2 II-IU
12/08/92
- ~ - ~ -v-S ~ ~ 12/09/92
- -r~
OFC SCDB I E IMOB , IM0B I E IMNS _ NS
NAME *CHaughney KRamsey K 4 *FCombs y
Aves ham
DATE 12/10/92 I/ 3 ,f
E 91q 12/8/92 ____I/ 3 ___ I___ / a :_I
C: COVER E: COVER & LNCL. N: NU WLI
OFFICIAL RECORD COPY: G:LOCKING.SWM
IN 92- December , 1992 No written response is required by this information notice. If you have any
questions about this matter, please contact the appropriate NRC regional
office or the personnel listed below.
Richard E. Cunningham, Director
Division Industrial and
Medical Nuclear Safety, NMSS
Technical Contacts: Gary Shear, Region III
708-790-5620
\m Charles Cain, Region IV
817-860-8186 cott Moore, NMSS
01-504-2514 Attachments:
1. List of Recently Issued NHSS Information Notices
2. List of Recently Issued NR nformation Notices
OFC HQ IEI M A INI -AIEI AB IA
NAME ro I _I ______I____/_ I_____
DATE ii/o30/92 10/19/92 /A/I/92\ 6 I,9I1/92 OFC SCDB IM Io I MNS
IIi IMNS
NAME CH ge KRamsey = xJGreeves
Uo X RECunninghim
DATE It/la /92 j9/ /92 81I /_/92 _2
//92_
C: COVER E: COVER & ENCL. N: NO COPY
OFFICIAL RECORD COPY: G:LOCKING.SWM