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Title: Promethus Hot Leg Piping Concept

The Naval Reactors Prime Contractor Team (NRPCT) recommended the development of a gas cooled reactor directly coupled to a Brayton energy conversion system as the Space Nuclear Power Plant (SNPP) for NASA's Project Prometheus. The section of piping between the reactor outlet and turbine inlet, designated as the hot leg piping, required unique design features to allow the use of a nickel superalloy rather than a refractory metal as the pressure boundary. The NRPCT evaluated a variety of hot leg piping concepts for performance relative to SNPP system parameters, manufacturability, material considerations, and comparison to past high temperature gas reactor (HTGR) practice. Manufacturability challenges and the impact of pressure drop and turbine entrance temperature reduction on cycle efficiency were discriminators between the piping concepts. This paper summarizes the NRPCT hot leg piping evaluation, presents the concept recommended, and summarizes developmental issues for the recommended concept.
Authors:
;
Publication Date:
OSTI Identifier:
881289
Report Number(s):
LM-05K184
TRN: US0602907
DOE Contract Number:
DE-AC12-00SN39357
Resource Type:
Technical Report
Research Org:
Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 36 MATERIALS SCIENCE; 42 ENGINEERING; CONTRACTORS; DESIGN; DISCRIMINATORS; EFFICIENCY; ENERGY CONVERSION; EVALUATION; GAS COOLED REACTORS; HEAT RESISTING ALLOYS; NICKEL; NUCLEAR POWER PLANTS; PERFORMANCE; PRESSURE DROP; REFRACTORY METALS; SHIP PROPULSION REACTORS; TURBINES