Development of 15-m-long radiation hard periscope for ITER in-vessel viewing

Obara, Kenjiro; Ito, Ataka; Kakudate, Satoshi; Oka, Kryoshi; Nakahira, Masataka; Morita, Yasuji; Taguchi, K.; Fukatsu, S.; Takeda, Nobukazu; Takahashi, H.; Tada, Eiji; Hager, Robert; Shibanuma, Kiyoshi; Haange, R.

doi:10.1016/s0920-3796(98)00096-9

Cited by 4 publications

(2 citation statements)

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“…Maintaining optical alignment over such a large free path will be extremely challenging because of thermal expansion and vibration issues. Two radiation-hardened periscopes were designed and evaluated for applications in the international thermonuclear experimental reactor (Obara et al 1998). This study designed and tested 6-m and 15-m periscopes that used radiation-hardened lenses made of alkaline barium glass, lead glass containing CeO 2 , and OH-doped synthetic quartz.…”

Section: Periscope Accessmentioning

confidence: 99%

Technical Readiness and Gaps Analysis of Commercial Optical Materials and Measurement Systems for Advanced Small Modular Reactors

Anheier¹,

Suter²,

Qiao³

et al. 2013

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Energy Research and Development Roadmap and industry stakeholders by evaluating optically based instrumentation and control (I&C) concepts for advanced small modular reactor (AdvSMR) applications. These advanced designs will require innovative thinking in terms of engineering approaches, materials integration, and I&C concepts to realize their eventual viability and deployment. The primary goals of this report include:1. Establish preliminary I&C needs, performance requirements, and possible gaps for AdvSMR designs based on best-available published design data.2. Document commercial off-the-shelf (COTS) optical sensors, components, and materials in terms of their technical readiness to support essential AdvSMR in-vessel I&C systems.3. Identify technology gaps by comparing the in-vessel monitoring requirements and environmental constraints to COTS optical sensor and materials performance specifications.4. Outline a future research, development, and demonstration (RD&D) program plan that addresses these gaps and develops optical-based I&C systems that enhance the viability of future AdvSMR designs.The DOE-NE roadmap outlines RD&D activities intended to overcome technical barriers that currently limit advances in nuclear energy. As part of this strategy, DOE-NE is sponsoring research on advanced reactor supportive technologies to reduce the identified barriers. Key challenges that must be overcome include the high capital costs to develop nuclear power plants, maintaining safety performance as the reactor fleet expands, minimizing nuclear waste, and maintaining strong proliferation resistance. AdvSMR designs are a major component of this strategy, because these designs offer a number of unique advantages. The modular and small size of AdvSMR designs naturally lead to reduced capital investments and, potentially, construction savings through factory fabrication. However, new economic and technical challenges accompany the many attractive features offered by AdvSMR designs. Specifically, the modest power output of AdvSMRs does not provide the economy of scale afforded by large reactors. In addition, many of the AdvSMR designs operate at much higher temperatures than lightwater reactors and require instrumentation to withstand harsh, in-vessel environments arising from unconventional, chemically aggressive coolants and unique reactor system configurations.Addressing these I&C challenges will be critically important to the AdvSMR development program to ensure the viability and future success of advanced reactor designs. Solutions will likely be found through evolution of conventional reactor technology, and the development of entirely new concepts. Early pressure/boiling water reactors used conventional I&C technologies (e.g., thermocouples, ionchambers, strain-gauge pressure sensors) to satisfy design requirements. Because these technologies worked well in the relatively low-temperature reactor designs, the demand for alternate I&C technologies was limited. At the time, optical-based reactor monitoring concepts were g...

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Section: Periscope Accessmentioning

confidence: 99%

Technical Readiness and Gaps Analysis of Commercial Optical Materials and Measurement Systems for Advanced Small Modular Reactors

Anheier¹,

Suter²,

Qiao³

et al. 2013

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“…Periscope outer tube stress could be calculated according to its structure [4][5][6], its structural design is as follows. The total length of the carbon fiber periscope outer tube is 10 m, immersed length is 1.9 m and the length above the sea surface is 0.5 m. The whole structure adopts four bearings supporting form.…”

Section: Structure Design Of Carbon Fiber Periscope Outer Tubementioning

confidence: 99%

Research on CFRP Periscope Outer Tube

Zhang

et al. 2013

AMR

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According to the structure and mechanical characteristics, a CFRP (carbon fiber reinforced plastic) periscope outer tube was designed. The parameters were determined such as fiber orientation angles, number of layers, proportion of fiber with different angles, and stacking sequences. A finite element model was built for the analysis of bending strength and modal. A CFRP periscope outer tube specimen was processed for the bending performance test. The results of simulation and experiments show that the CFRP periscope outer tube could meet the requirements.

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Viewing and inspection in tokamak machines

Maisonnier

2001

Fusion Engineering and Design

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Development of 15-m-long radiation hard periscope for ITER in-vessel viewing

Cited by 4 publications

References 0 publications

Technical Readiness and Gaps Analysis of Commercial Optical Materials and Measurement Systems for Advanced Small Modular Reactors

Technical Readiness and Gaps Analysis of Commercial Optical Materials and Measurement Systems for Advanced Small Modular Reactors

Research on CFRP Periscope Outer Tube

Viewing and inspection in tokamak machines

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