United States Nuclear Regulatory Commission - Protecting People and the Environment

Wyman-Gordon Co. (State of Massachususetts)

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1.0 Site Identification

Type of Site: Complex Decommissioning Site
Location: North Grafton, MA
License No.: 20-17067-02
Docket No.:
License Status: Unknown

2.0 Site Status Summary

Formerly an NRC Site Decommissioning Management Plan (SDMP) as a "Priority C" (lowest priority) site.

Between 1958 and 1970, Wyman-Gordon was licensed by the AEC to receive handle magnesium thorium (3%) alloy materials and to manufacture Mg-Th forgings. During this time, approximately 167 cubic yards of solid magnesium - thorium (3%) waste and/or Mg-Th contaminated tools and small miscellaneous equipment were buried in approximately 25 trenches in the northeast sector of the plant site. Each trench is about three feet wide, six feet deep, and 25 feet in length. Waste was placed in each trench was nominally two feet deep and covered with four feet of soil. The bottom of the trenches were believed to be 4-5 feet about the ground water table. Total inventory of buried waste is approximately 42,000 pounds.

On February 22, 1993, the NRC sent a draft Dose Assessment for comment to Wyman Gordon. The draft Dose Assessment indicated that the magnesium - thorium waste should be remediated since doses from future use scenarios would be in excess of 1,000 mrem/yr for a unrestricted release criteria.

On May 14, 1993, Wyman Gordon submitted response to the NRC disagreeing with many of the input parameters used in the draft Dose Assessment.

Since 1990 to the present, Wyman-Gordon has had groundwater monitoring performed around disposal area and have been shown to be in compliance with the EPA drinking water requirements for gross alpha and beta.

In October 2000, two additional monitoring wells were installed in the vicinity of the disposal trenches. These wells were installed as part of a Phase II - Comprehensive Site Assessment of the northeast portion of the site under the provisions of the Massachusetts Contingency Plan (MCP).

3.0 Major Technical or Regulatory Issues

Page Last Reviewed/Updated Monday, November 25, 2013