Wind effects on the performance of the reactor vessel auxiliary cooling system

Tzanos, CP; Hunsbedt, A

dc.contributor.author	Tzanos, CP	en
dc.contributor.author	Hunsbedt, A	en
dc.date.accessioned	2014-03-01T01:44:57Z
dc.date.available	2014-03-01T01:44:57Z
dc.date.issued	1996	en
dc.identifier.issn	00295450	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24530
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0030104795&partnerID=40&md5=ee51b890f847f1bb777bd01cc8f5ff30	en
dc.subject	Decay heat removal	en
dc.subject	Passive safety systems	en
dc.subject	Wind effects	en
dc.subject.other	Aerodynamics	en
dc.subject.other	Density (specific gravity)	en
dc.subject.other	Ducts	en
dc.subject.other	Effects	en
dc.subject.other	Heat transfer	en
dc.subject.other	Liquid metal cooled reactors	en
dc.subject.other	Pressure effects	en
dc.subject.other	Wakes	en
dc.subject.other	Air density	en
dc.subject.other	Air inlets	en
dc.subject.other	Decay heat removal	en
dc.subject.other	Natural circulation	en
dc.subject.other	Peak cladding temperature	en
dc.subject.other	Pressure distribution	en
dc.subject.other	Pressure loss	en
dc.subject.other	PRISM concept	en
dc.subject.other	Reactor vessel auxiliary cooling system	en
dc.subject.other	Stacks	en
dc.subject.other	Cooling systems	en
dc.title	Wind effects on the performance of the reactor vessel auxiliary cooling system	en
heal.type	journalArticle	en
heal.publicationDate	1996	en
heal.abstract	The performance of the reactor vessel auxiliary cooling system (RVACS) of a liquid-metal reactor is a function of the pressure difference between the cooling air inlet and outlet, of the air density variation along the flow path, and of the pressure loss and heat transfer characteristics of this path. The pressure difference between the air inlet and outlet as well as the RVACS inlet temperature may be affected by wind speed and direction. The objective of this work was to analyze the effects of wind on the performance of the RVACS of an advanced liquid metal reactor design based on the PRISM concept. Each stack of the reference RVACS design had two air inlets. The analysis showed that one particular wind direction had the most adverse impact on the RVACS performance. For this direction, in a two-inlet stack design, the net effect of a 27 m/s (60 mph) wind on the RVACS airflow would be a reduction of ∼15%; while in a four-inlet design, the net effect would be nearly zero. A 15% reduction in the RVACS airflow would increase the peak cladding temperature by ∼15°C. In reality, however, the wind direction fluctuates around an average direction, and the most adverse wind effect should be <15°C. The temperature at the inlet of the downwind stacks is affected by the outflow of the upwind stacks, but the effect is small. For an air temperature change of 164°C along the RVACS flow path, the maximum inlet temperature rise is ∼5°C. This would increase the peak cladding temperature by ∼1°C.	en
heal.journalName	Nuclear Technology	en
dc.identifier.volume	113	en
dc.identifier.issue	3	en
dc.identifier.spage	249	en
dc.identifier.epage	267	en