ML20002B199
| ML20002B199 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 10/25/1977 |
| From: | Hoenes G, Waite D Battelle Memorial Institute, PACIFIC NORTHWEST NATION |
| To: | Barrett L Office of Nuclear Reactor Regulation |
| References | |
| FOIA-80-550 NUDOCS 8012110065 | |
| Download: ML20002B199 (3) | |
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e OBattelle Pacific Northwest Laboratories Battelle Boulevard Rechland. Washington 99352 Telephone (509)
October 25, 1977 Telex 32as Mr. Lake Barrett U.S. Nuclear Regulatory Comission Division of Operating Reactors, ONRR Washington, DC 20555
Dear Lake:
An initial review of the document entitled " Technical Study for the Chemical Cleaning of Dresden-1" submitted by the Dow Chemical Company has been completed.
In order to make our assessment of the proposed action, we need clarification and additional information in the following areas.
I.
EQUIPMENT INSTALLATION AND HOOKUP A.
Procedures for installation of temporary piping and drain lines in the primary coolant system.
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1.
Which procedures will be remote and which will require
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workers to be in close proximity to perform the job?
2.
What methods will be employed to ensure containment of radioactive material during installation and hookup?
B.
Provide a detailed example of dose calculations for a particular procedure. This should include:
1.
A detailed procedure outline 2.
The time and personnel involved in the job 3.
Actual dose rate measurements taken in the area where the job will be performed 4.
Specific procedures and techniques used to reduce the radiation exposure during the job.
C.
What are the procedures and provisions for removal and disposal of temporary piping, drain lir.es and other material used during the chemical cleaning of Dresden-l?
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C II. ' OPERATION OF DECONTAMINATION SYSTEM
! A. 'Which. portions of the actual cleaning operations are expected to contribute' the major portion of radiation exposure?
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B.
What contingencies have been taken into consideration in the dose estimates?
C. -- Specifically, which procedures will involve contact maintenance -
or operation?
III. RADWASTE BUILDING A.
What type of ventilation system has been installed in the radwaste
'bui.1 ding? How will effluents be controlled?
B.
What parts' of the. building and waste treatment system must be
' dismantled and removed or decontaminated after the chemical
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cleaning has been' completed? How much radiation exposure is expected from.these procedures?
C.
Since the cleaning solution etches-stainless steel, what pro-
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visions have been taken -to ensure that the waste storage tanks will isolate the waste solution effectively?
.IV.
WASTE HANDLING OPERATIONS A.
How will the radwaste system be operated? Will it be a remote operation or an inhabited operation? What are the procedures-for handling and processing the liquid waste?
B.
What contingencies have been considered in the dose estimates for waste handling?
, P C.
Does dismantling and cleanup include loading waste containers and transport to the disposal site?
D.
What are the detailed procedums for processing and solidification of the radwaste, including the dose estimates for these procedures?
V.
RADIONUCLIDE INVENTORY 60 A.
What. radionuclides, other than Co, may need to be considered from th'e viewpoint 'of waste disposal?
1.
TRU content could change the type of disposal necessary.
2.
A significant change in total activity coitent of.the waste could result if 55 e and 58 o are considered.
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3.
Some environmental concerns may arise if any volatile fission products, i.e.,129, are present in the waste 1
stream.
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Have any measurements been taken to determine the levels of individual radionuclides in the system?
If this infomation can be provided, it will enable us to make a better assess-ment of the occurrence of radiation exposure and will better enable us to suggest possible means of reducing this exposure.
. Sincerely, n
&%A G. R. Hoenes and D. A. Waite Occupational and Environmental Safety Department
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