ML20002A657

Forwards Request for Addl Info Needed for Completion of Review for AECC-2-P, Radwaste Vol Reduction Sys

ML20002A657
Person / Time
Issue date:	11/10/1980
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Keith R AEROJET ENERGY CONVERSION CO. (SUBS. OF GENERAL TIRE
References
NUDOCS 8011210176
Download: ML20002A657 (3)

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Mr. R. C. Keith, Product Manager Energy Systems

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6' El P. O. Box 13222 Sacramento, California 95813

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON AECC-2-P We are currently reviewing the Aerojet Energy Cnnversion Company Licensing Topical Report number AECC-2-P dated October 15, 1979 entitled " Radioactive Waste Volume Reduction System."

The initial review by our Radiological. Assessment Branch reveals a need for the further information regarding ALARA design features, man-rem estimates, and system operation. The five questions in the enclosure indicate the specific infomation required.

This information is necessary to complete the review - its expeditious submittal will, therefore, be to Aerojet's advantage.

Please advise us as scan as.possible of your planned submittal date so as to pemit us, in turn, to develop a further review schedule.

Sincerely.

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Robert L. Tedesco, Assistant Director for Licensing

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s 331-1 331.0 RADIOLOGICAL ASSESSME!1T 3RA?lCH 331.1 l3.1)

In Chapter 3.1 you describe the typical dry waste materials which can be processed by the fluid bed incinerator.

Include a list of materials, such as PCV's, which if processed by the 7

fluid bed. incinerator, would result in damage to the system and a likely increase in occupational exposure associated with repair of the system. Describe stages taken to prevent the introduction of such materials into the shredder / fluid bed incinerator.

i 331.2 Describe the precautions.taken to minimize personnel exposures (3.7) during the remote ' cleaning of the decontamination nozzles in the various system components should these nozzles become clogged.

16 331.3 Oiscuss the expected service life of the charcoal adsorbers (4.2.13 and HEPA filters. Describe the desigr features of the gas filter assembly that are incorporated to maintain personnel doses ALARA during element changeout. Address your conformance with the guidelines of Regulatory Guide 1.140,

" Design, Testing, and Maintenance Criteria for Nornal Ventilation Exhaust System Air Filtration and Adsorption Units of Light-Water-Cooled Nuclear Power Plants", or give suitable alternatives.

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331-2 331.4 Sased on the operating experience of the AECC VR system, provide

.(8.4.3) a realistic estimate of the downtime associated with operation of this system at a utility where the system operator will have had no prior experience with the operation of such a volume reduction system. Provide an estimate of the annual man. rem that will-be associated with each of the following functions:

operation, maintenance, and inservice inspection.

Include in your response: 1) the expected radiaticn fields (R/hr) associated with all components and cubicles of the radwaste system where personnel may require access to perform the above mentioned functions, 2) the occupancy times (hrs /yr) required in each of these locations, and 3) the exposure (man-rem /yr) received.for each function and/or location. Supply this information for all segments of the radwaste system, including the off-gas cleanup system.

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331.5 The following design features are intended to minimize the

'8.4.3' deposition and. accumulation of radioactive materials in the comoonents of waste processing systems. Describe how your system design reflect's consideration of these features to-maintain occupational radiation exposures ALARA:

1) Reducing the length of piping runs.

2) Avoiding' low points'and dead legs in piping.

3) Using larger diameter piping to minimize plugging.

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