CENTER FOR RADIOISOTOPE FACILITIES (CRF)

Technical and supporting staffs of the CRF maintain three controlled areas being adaptable for the law. The purchase of radioisotopes from JRA (Japan Radioisotope Association) and the transfer of radioisotope wastes to JRA is under our surveillance.

Matsuda,Iinuma, Ito, and kaneuji are maintaining CFBI(Common Facilities Building I)-branch and LGER (Laboratory of Gene Expression and Regulation)-branch in the Myodaiji-Area, and Ogawa, Sawada, Katagiri, and Kamiya working in the Yamate-Area.

Number of registrants and users in 2004 April to November are shown in table 1.

Users going in and out the controlled areas counted by the monitoring system are 5,046 persons in 2004 April to November. The items in each area is shown in Figure 1 and table 2. Annual changes of registrants and number of totals per year is shown in figure 2. And amounts of radioisotopes used in the CRF is shown in Table 3.

At 2004 December,the animal radiation wastes drying system was renewed. (figure 3) This system can dry animal bodies etc. with heat, and can perform the pretreatment handed over to JRA.

Table1. Number of registrants and users in the 2004.

Figure 1. Percentage of users going in and out the controlled areas in 2004.

Table 2. The numbers of users and visitors who entered into an each controlled area in 2004

Figure 2. Annual changes of registrants and number of totals per fisical year

Table 3 Balance of radioisotopes received and used (MBq)

Figure 3. the animal radiation wastes drying system (Wakaida Engneering Co. type WINDY2000)