Randy, If a component or material is to be suspended in our spent fuel pool or equipment pit and the dose rates are >1rem/hr @ 30cm in air, or >1rem/hr @ contact in water we incorporate the following controls. Clearly label the lanyard, cable, or rope with a sign bearing the radiation symbol and the words "CAUTION, RADIOACTIVE MATERIAL," and with sufficient information to permit individuals handling the material to take precautions to avoid or minimize their exposure (e.g., dose rate, contents, special instructions etc.) Obtain approval from the RPM or designee. Establish one of the following controls to ensure that the material is not raised near the surface or out of the water without RP authorization: 1) Station a guard in the area; OR 2) Provide physical measures to ensure that the material is not inadvertently raised near the surface or out of the pool. Such as:
* Ensuring that the item can only be raised to the surface by use of underwater handling tools, cranes or hoists. * Providing a locking device that prevents the item from being raised. * Providing a physical barrier which prevents access to the material. * Locking all access points to the area. Ray Thomson Health Physics Staff Advisor Columbia Generating Station [email protected] Office, 509-377-8273 From: [email protected] [mailto:[email protected]] On Behalf Of Peterson, Randy L (C&RP) Sent: Wednesday, January 11, 2012 5:43 AM To: '[email protected]' Subject: Powernet: Highly Irradiated material stored in pool When you store highly irradiated material in your pool, how is the lanyard attached and how do you tag the laynard? Randy Peterson RP Foreman Pacific Gas & Electric Company Diablo Canyon Power Plant Bldg 101/85 Avila Beach, CA 93424 Ph: 805.545.4588 | Pg: 4588| [email protected]<mailto:[email protected]>
