ML20215B233

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Corrected Page 1 to 861031 Topical Rept Evaluation of Rev 2 to STD-R-05-011, Mobile In-Container Dewatering & Solidification Sys (Mdss). Word Effective Inserted Before Words Pore Sizes in First Line of 4th Paragraph
ML20215B233
Person / Time
Issue date: 12/04/1986
From:
Office of Nuclear Reactor Regulation
To:
Shared Package
ML20215B047 List:
References
NUDOCS 8612120086
Download: ML20215B233 (1)


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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR R Report Number:

STD-R-05-011 Revision 2 Report

Title:

Mobile Incontainer Dewatering and Solidification System (MDSS)

Originating I Organization Westinghouse-Hittman Nuclear, Inc.,

Columbia, MD  !

Reviewed By:

(1) EG&G Idaho, Inc.

(2) Plant Systems Branch,

' Division of PWR Licensing - A

1.0 INTRODUCTION

On December 18, 1985 Westinghouse-Hittman Nuclear, Inc. (WHN) submitted for NRC review and approval their licensing topical report STD-R-05-011. " Mobile Incontainer Dewatering and Solidification System reviewed by EG&G Idaho, Inc. and questions were su(MDSS)." This document was 1986. bmitted to WHN in June of October,1986; remained July.

the revision number was changed but the pu the review of that document by EGSG.This safety evaluation is based on the re

-(, This evaluation addresses the systems and operations issues.

of the form Materials of the Safety andsolidified Safeguards.waste is being evaluated by the Office of NuclearThe acc The WHN report addresses two separate methods of processing wet radioactive

- waste for shipment to a disposal site. The wastes may either be solidified or simply dewatered (dried).

container that will be shipped and disposed.In either case the processing is done 4hM For dewatering, greater WHN uses a special porous plastic pipe wit'1, pore sizes no than 5 microns.

This permits the dewatering of a wide range of wastes, including powdered resins in the container and without centrifuging.

Class A wastes (those with little radioactivity) may be dewatered in steel containers C wastes. while high integrity containers (HICs) are required for Class B or 4 and 11 and the temperature must not exceed 140 degrees Fa l

After the initial dewatering dewatered again. operation,'the waste is allowed to settle for a day and steel containers and 1% in HICs) are met.This is repeated until the water conte For solidification, WHN uses Portland Type I cement as a solidification agent.

The amount of cement used and the other additives depend on the waste being processed.

WHN has submitted test data to demonstrate compliance with detailed in WHN report ST0-R-05-006.the waste form. criteria for a variety The wastes are mixed with the cement and and allowed to solidify. additives in a large steel liner, mixed with disposable <

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