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STACK

SAMPLER, INSTRUMENT PENETRATIONS

t

VIEW PORT

,SALT

X-ENCLOSURE

PUMP

SURVEILLANCE STATION

BULK SALT SEPARATOR

VENTURI FUTURE LXPERIMENTS

SEPARATOR

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8

SAMPLER

HELtUM

-

s n w

i

c

Fig. 3.3. Gas system technology facility.

Mark 2 pump modified as described in Sect. 3.7.1. A line downstream of the pump allows part (approximately one-half) of the flow to bypass the main loop. The main loop flow goes through a flow-measuring venturi (from the MSRE), a bubble separator, and a bubble generator before rejoining the bypass flow and returning to the salt pump. Helium is injected at the bubble generator and flows around the loop and through the pump prior to being stripped at the bubble separator. The separated gas (0 to 37 slm) and entrained salt (12.5 to 6 gpm) go to the bulk salt separator which is an 8-ft-long section of S-in. Hastelloy N pipe inclined slightly from horizontal. The salt from the bulk salt separator is returned to the loop via the salt pump bowl, and the gas is recycled to the bubble generator. Pipe nozzles are shown in the high- and low-pressure parts of the loop to facilitate installation of future experiments. A salt-monitoring station is included for testing various on-line instruments for determining chemical and physical properties of the salt. The main loop configuration was established, the preliminary instrument application drawings were completed, and the drain tank design was nearly complete

at the end of the period. Initial operation is scheduled to start in the fall of 1972, using coolant salt from the MSRE to establish a base line for later operations. After preliminary experiments and shakedown tests are complete, this salt will be replaced with a salt similar to the fuel salt projected for the MSBE.

3.3 OFF-GAS SYSTEMS A. N. Smith

3.3.1 Off-Gas System for Moltensalt Reactors A design basis report is being written for off-gas systems for use with molten-salt reactors. This report reviews the present technology of off-gas systems, discusses the advantages and disadvantages of several approaches for the design of the off-gas systems, describes the’ design of the system chosen for a reference, and discusses the additional information which must be developed to establish the design. The primary’purpose of this report is to document the basis for the reference design and to define the development effort needed for the design of reliable off-gas systems.

*

ORNL-4728  

http://www.energyfromthorium.com/pdf/ORNL-4728.pdf

ORNL-4728  

http://www.energyfromthorium.com/pdf/ORNL-4728.pdf

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