Study of variation of materials patients room’s door related of neutron flux iradiation

• Main Authors: Nirmalasari, Yuliana Dian, Suparmi, A., Sardjono, Y.
• Format: Conference Proceeding
• Language: English
• Subjects: Cyclotrons; Neutron flux; Patients; Simulation; Stainless steel; Stainless steels; Steel industry
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4995171

The treatment chamber of patients has been simulating with MCNPX Code. Optimation of simulation design of Irradiation chamber is corresponding to ISO standards for 30 MeV cyclotron generator. The simulation has used the variation of door’s materials that was applied at treatment room’s door. The variation of materials was Stainless Steel 202 and Pb, the thickness Pb and stainless steel 202 with the thickness were 2 cm, respectively. Neutron flux that was radiated to stainless steel 202 in the sequence was 3.34195 × 105 n . Cm−2 s−1 and 8.41568 × 104 n . Cm−2 s−1, while for Pb was 4.01349 × 105 n . Cm−2 s−1 and 2.58058 × 104 n . Cm−2 s−1. The further, neutron flux that was radiated to Pb and stainless steel 202 with the thickness were 4 cm in sequence was 4.00601 × 105 n . Cm−2 s−1 and 1.71713 × 104 n . Cm−2 s−1 for Pb, while for SS 202 was 3.09925 × 105 n . Cm−2 s−1. From this ratio we concluded that material Pb absorbed higher neutron flux than material Stainless Steel 202. On the other hand, the cost of Pb was more expensive than Stainless Steel 202. In addition, the material Stainless Steel 202 was obtaine more easily than the material Pb. There fore to overcome the economics problem, can try to build the door with stainless still 202 sheet and Pb sheet together. The further, the neutron dose with 2 cm of thickness was 7.69603 × 10−2 Gy and 2.10623 × 10−2 Gy for SS 202, while for Pb was 4.19444 × 10−2 Gy and 1.50581 × 10−2 Gy. While the neutron dose with 4 cm of thickness for SS 202 was 9.39602 × 10−2 Gy and for Pb was 4.46541 × 10−2 Gy and 1.50502 × 10−2 Gy. We recommend that this simulation should be further optimized.