The Gamma Green House (GGH) is a chronic irradiation facility located at MINT Tech Park, Nuclear Malaysia, Jalan Dengkil. GGH is used for induction of mutation in plants and other biological samples with low dose radiation over period of time depending on the nature and sensitivity of the plant species. Gamma Greenhouse facility at Malaysian Nuclear Agency comprises an open topped
irradiation area consisting of circular green house with 30 meters radius, control room and irradiator with interlock system. The irradiation source is a REVISS RSL6050 double encapsulated 800 Ci 137Cs (half-life 30.1 years for 137Cs) pencils and allowed to be exposed only when the entire 300 m diameter site is free from personnel. The irradiator system is secured by a sophisticated interlock system, which only allows the source to be exposed when all the prerequisite safety conditions are met, and automatically returns the source to the safe
storage position if any safety device is compromised.