[en] Chillers for centralised air conditioning system in Agensi Nuklear Malaysia have been operated for 20 to 35 years. there are 5 chillers where 3 chillers are located in Block 27, and 1 chiller located in Block 42 and 44 respectively. With good practice, operating and maintaining chiller have been going for such a long time than its expected life cycle. However, those chillers need to be replaced with new chiller due to outdated technology and inefficiency for energy consumption. This paper will describe the reason for chiller replacement and also the proposal works to obtain reduction in electricity consumption. as a conclusion, all of chillers in Agensi Nuklear Malaysia need to be replaced in order to support RandD activities and for reduction of electricity consumption. (author)

[en] The radioactive waste temporary storage in Malaysian Nuclear Agency is to store waste that obtained from extraction of monazite and rare earth mineral in order to produce thorium. Hence, the waste temporary storage shall follow safety, security and safeguard guideline. One of the criteria in designing the radioactive waste temporary storage is ventilation system that can control the temperature and humidity level in order to ensure radioactive waste in good condition. The objective of this research is to design the ventilation system for portable cabin as a temporary storage for radioactive waste that obtained from thorium extraction process. The output of this research is important to ensure ventilation system was designed as per good engineering practice in order to ensure temperature and humidity level in radioactive waste temporary storage as per design requirement. (author)

[en] Radioactive laboratory will be used for thorium extraction and purification process before can be used as a nuclear fuel for generating electricity in nuclear power plant. One of the criteria for laboratory is pressure inside shall be negative pressure relative to adjacent room or surrounding area. The objective of this research is to design the heating, ventilation and air conditioning (HVAC) system with negative pressure for radioactive laboratory to ensure the thorium extraction and purification process can be done safely without causing danger to human and environment. The output of this research is important to ensure all the activities done in radioactive laboratory followed safety, security and safeguard guideline as recommended by International Atomic Energy Agency (IAEA). (author)

[en] Mechanical Unit under Engineering Department is responsible in operation and maintenance of building mechanical system and also government vehicles in Malaysian Nuclear Agency. Mechanical Unit manages about 15 periodic maintenance contracts and at least 10 repairs and upgrading works of building mechanical system a year. Among the main building mechanical system are air conditioning and ventilation systems, air compressors, fire protection systems, elevators, overhead crane and LPG system. In 2015, the maintenance of this mechanical system costs almost RM2.0 million a year. However, several measures have been taken in order to reduce this maintenance cost to RM1.5 million in 2020. This paper will describe the efforts have been taken to reduce maintenance cost of building mechanical system. With the savings achieved, this surplus operating expenditure has been used for other uses which can benefit the Malaysian Government, especially the Malaysian Nuclear Agency. (author)