Glen: This is a summary of a similar question posted about a month ago:
Robinson Asks: Although High Radiation areas have to barricaded with a continuous barrier (minimum of continuous rope with swing gate at entrance), Radiation Areas at Robinson are often posted with signs on stanchions that are not connected by rad rope. We might use several Radiation Area postings on stanchions, placed around a B-25 that met the 5mR/hr at one foot criteria for being a Radiation Area, for example, without connecting all of the postings/stanchions using rad rope. Question: Does your site post Radiation Areas similarly, or do you require Radiation Area postings/stanchions to be linked together using rad rope? Region I: Exelon does not use swing gates for anything other than HRA controls. No contiguous boundary required, Region II Responses (mixed): -Robinson does not use contiguous ropes - The Duke Fleet does use contiguous ropes Region III Responses (mixed): Monticello requires Radiation Area postings with stanchions to be linked together using rad rope Exelon does not use swing gates for anything other than HRA controls. No contiguous boundary required, Region IV Responses (mixed): -At STP we also do not use rope barricades for radiation areas unless it would help define the area for the workers (judgment call) -At Palo Verde we require Radiation Area postings with stanchions to be linked together using rad rope. -Fort Calhoun requires Radiation Area postings with stanchions to be linked together using rad rope - Cooper Nuclear Station uses the following for guidance: 7.1 Normally, Radiation Areas inside the RCAs are identified by a posting on a stanchion, wall, floor, or door at each approach to the area. Rope boundaries or barriers may be used, when necessary, to effectively indicate the extent of area. From: [email protected] [mailto:[email protected]] On Behalf Of Egert, Glenn W. Sent: Monday, November 15, 2010 6:01 PM To: [email protected] Cc: Sanker, Richard B. Subject: Powernet: Posting Radiation Areas Columbia Generating Station asks the following questions. 1. How do you post Radiation Areas in your plant? : a. Ropes and signs b. Single stanchion and a sign c. Markings on the floor d. Some combination of the above 2. In areas where ropes are used to post Radiation Areas, how high are they posted? a. waist level with swing gates b. head level c. above head level d. other Glenn W. Egert Radiological Support, Dosimetry Columbia Generating Station Energy Northwest (509) 377-4418 [email protected]<mailto:[email protected]>
