Research Papers: Nuclear Power

Development of an Innovative Plate-Type SG for Sodium Cooled Fast Reactor: Concept and Test Fabrication

[+] Author and Article Information
Yoshihisa Nishi

 Central Research Institute of Electric Power Industry (CRIEPI), 2-11-1 Iwado Kita, Komae-shi, Tokyo 201-8511, Japany-nishi@criepi.denken.or.jp

Izumi Kinoshita

 Central Research Institute of Electric Power Industry (CRIEPI), 2-11-1 Iwado Kita, Komae-shi, Tokyo 201-8511, Japankinosita@criepi.denken.or.jp

J. Eng. Gas Turbines Power 131(2), 022902 (Dec 30, 2008) (7 pages) doi:10.1115/1.3032417 History: Received July 22, 2008; Revised September 16, 2008; Published December 30, 2008

The concept of an innovative plate-type steam generator (SG) for a fast reactor, fabricated using hot isostatic pressing (HIP), was presented. The heat-transfer plate, which is assembled with rectangular tubes and fabricated using HIP, is surrounded by a leak-detection layer. The optimum form for the detection layer was determined by crack extension analysis. The concept can be applied in both pool-type and loop-type liquid-metal cooled fast reactors (LMFRs). In this report, the fabrication technique is described as applied to a loop-type LMFR. Optimum HIP conditions of 1423 K (1150°C), 1200kgf/cm2(117MPa), and 3 h for modified 9Cr–1Mo steel were determined from HIP tests, tensile tests, and structural inspection. Nickel-type solder (BNi-5) and gold-type solder (BAu-4) were examined as potential joining materials to laminate the heat-transfer plates. Tensile test comparisons showed that BAu-4 was superior, so it was used. No problems were observed in the fabrication of a partial model of a SG (HIP of the rectangular tubes, brazing the plates, welding the header, etc.)

Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

A plate-fin type heat exchanger

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Figure 2

Production of the plate using HIP

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Figure 3

Conceptual image of the innovative SG for a pool-type reactor

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Figure 4

Heat-transfer tube structural concepts in side the heat-transfer plate for a pool-type LMFR

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Figure 5

(a) Conceptual image of the innovative SG for a loop-type reactor—cooling system of the loop-type LMFR; (b) conceptual image of the innovative SG for a loop-type reactor—schematic of the SG for a loop-type LMFR

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Figure 6

Leak detection layer

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Figure 7

Pitch of the leak detection groove

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Figure 8

Photo of the trial fabrication using HIP

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Figure 9

Image of the diffusion bonding process

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Figure 10

Microphotos near the interface (parameter: temperature (°C))

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Figure 11

Component for welding marginal test

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Figure 12

Photograph of the test plate after welding

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Figure 13

Boundary condition

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Figure 14

Node deviation (X-Y cross section)

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Figure 15

σxx stress (left side: position D; right side: position A)

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Figure 16

Distribution of the Von Mises stress

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Figure 17

Distribution of the maximum stress along three cross cut lines at the A position

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Figure 18

The layer of the rectangular tube with leak detection grooves

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Figure 19

Test body after brazing and hot pressing

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Figure 20

Partial model of SG

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Figure 21

Results of the size comparison




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