Use of a temperature-initiated passive cooling system (TIPACS) for the modular high-temperature gas-cooled reactor cavity cooling system (RCCS)

Forsberg, Charles W.; Conklin, J.C.; Reich, W.J.

doi:10.2172/10161764

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Different startup/shutdown temperatures can be selected by choosing fluids with different vapor-liquid critical points. Because all fluids have critical point temperatures unless they thermally decompose before the critical point is reached, there is a wide choice of options from helium at -267.96"C to mercury at 900"C. A short list of 41 potential heat transfer fluids was identified in our studies (Forsberg 1994).…”

Section: Principles Of Operdktionsmentioning

confidence: 99%

“…The TCS may contain a gas-liquid expansion volume above the expansion reservoir. This EXAMPLI_ APPLICATION: MOD_ HIGH TEMPERATURE GAS COOLED REACTOR TIPACS was evaluated for cooling an MHTGR reactor vessel and reactor cavity (Forsberg 1994). The design methodology is independent of application, although designs are application specific.…”

Section: Principles Of Operdktionsmentioning

confidence: 99%

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Temperature-Initiated Passive Cooling System (TIPACS)

Forsberg¹,

Conklin²

1994

Intersociety Energy Conversion Engineering Conference

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The Temperature-Initiated Passive Cooling System (TIPACS) is a recently invented passive cooling system that transfers heat from a hot, insulated system to a cooler, external environment. TIPACS has four defining characteristics: efficient heat-transfer, passive with no moving components, thermal switch mechanism that allows heat transfer only above a preset temperature, and one-way (heat diode) heat transfer. Example applications include cooling (1) building attics, (2) electrical sheds, (3) chemical reactors, (4) utility-load-leveling batteries, and (5) nuclear reactor containments. TIPACS was evaluated for cooling a modular high-temperature gas-cooled reactor (MHTGR) cavity. The evaluation indicates potential performance and economic advantages.

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Section: Principles Of Operdktionsmentioning

confidence: 99%

Section: Principles Of Operdktionsmentioning

confidence: 99%

Temperature-Initiated Passive Cooling System (TIPACS)

Forsberg¹,

Conklin²

1994

Intersociety Energy Conversion Engineering Conference

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“…Ahmad et al [5] raised a heat pipe design concept for a passive containment heat removal system. Forsberg and Conklin [6] presented a socalled temperature-initiated passive cooling system. A thermosyphon loop concept for double-shell concrete containment was developed by ENEL.…”

Section: Introductionmentioning

confidence: 99%

Study on the Behaviors of a Conceptual Passive Containment Cooling System

Wang

Guo

Sui

et al. 2014

Science and Technology of Nuclear Installations

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The containment is an ultimate and important barrier to mitigate the consequences after the release of mass and energy during such scenarios as loss of coolant accident (LOCA) or main steam line break (MSLB). In this investigation, a passive containment cooling system (PCCS) concept is proposed for a large dry concrete containment. The system is composed of series of heat exchangers, long connecting pipes with relatively large diameter, valves, and a water tank, which is located at the top of the system and serves as the final heat sink. The performance of the system is numerically studied in detail under different conditions. In addition, the influences of condensation heat transfer conditions and containment environment temperature conditions are also studied on the behaviors of the system. The results reveal that four distinct operating stages could be experienced as follows: startup stage, single phase quasisteady stage, flashing speed-up transient stage, and flashing dominated quasisteady operating stage. Furthermore, the mechanisms of system behaviors are thus analyzed. Moreover, the feasibility of the system is also discussed to meet the design purpose for the containment integrity requirement. Considering the passive feature and the compactness of the system, the proposed PCCS is promising for the advanced integral type reactor.

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