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Temporary Shielding Program Administration
The following questions are quite extensive in nature, and I do not expect
answers to be posted back on RADSAFE. For any of you who kindly take the
time to read and respond to these questions, please send replies to:
jim.patterson@ontariopowergeneration.com
Thanks in advance -
Jim Patterson
Health Physicist
Ontario Power Generation - Pickering Nuclear
Radiation Protection - ALARA Section
(905) 839-1151 x6734
Ontario Power Generation, Nuclear (OPG,N) wishes to consult the knowledge,
experience, and feedback of radiation protection professionals at commercial
nuclear generating stations with respect to administration, implementation,
and control of temporary shielding programs.
1. What group or organization has administrative control of the
Temporary Shielding Program? That is, what group "owns" the procedure for
temporary shielding?
a. What is the review and/or approval sequence or
hierarchy for installation of temporary shielding?
b. What administrative safeguards or procedural
mechanisms serve to inform the operations department of the existence of
temporary shielding in/on station components?
1) How is operations concurrence or
approval for installation of temporary shielding on system components
handled?
2. To what degree does engineering become involved with the evaluation,
inspection, and monitoring of temporary shielding?
3. What is the process by which weight loading of station components is
evaluated?
a. Are pre-engineered "table look-ups" utilized?
1) To what degree is this utilized?
2) What are the advantages of these
tables or this approach?
3) What are the disadvantages?
b. Does the engineering department or engineering
representative inspect installed shielding?
c. Does any other department inspect installed
shielding? If so, what is the frequency of these inspection? What is the
scope or criteria of the inspection; it's purpose?
d. What quality control safeguards exist to ensure
components are not loaded beyond specifications?
4. What group or organization is responsible for the actual
installation of temporary shielding on station components?
5. What control mechanism serves to ensure that temporary shielding is
removed from system components to permit it's safe operation?
a. Temporary shielding or degraded system/equipment
tracking lists?
6. What are some examples of other administrative control safeguards
that should be incorporated in a "good" shielding program?
7. What is the experience of your facility with respect to
administration of temporary shielding programs?
a. Approximately what amount of time in terms of Full
Time Employees per reactor/outage is required for temporary shielding
program administration (shield package preparation, monitoring, inventory,
supervision of shielding application, and so forth)?
8. How is inventory and storage of shielding handled at your facility?
a. What group or organization is responsible for the
"custody" of temporary shielding?
1) Is there a dedicated lay-down or
storage area?
9. Contamination control
1) Prior to storage, is shielding
completely decontaminated or are threshold contamination levels established?
2) What group or group discipline
performs decontamination if this is required?
10. Budgets, work orders, and administration of shielding installation.
a. Does your facility require the use of work orders or
similar budget allocation mechanisms as part of the program administration
and installation process?
b. Are separate work orders required for singular
installations or is there a "global" work order for this purpose?
c. Do such budgetary costs, if applicable, come from
the group that "owns" the program or does it reside with station dose
reduction initiatives (i.e. Station Management)?
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