Application of Crack Arrest Theory to a Thermal Shock Experiment

Cheverton, R.D.; Gehlen, P. C.; Hahn, G. T.; Iskander, S.K.

doi:10.1520/stp27459s

Cited by 22 publications

(10 citation statements)

References 9 publications

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“…Cheverton et al, 1980;Kanninen et al, 1985;Nilsson, 1986a, 1986b). This may not be the case, however, for experiments or structural situations where longer crack jumps are experienced.…”

Section: Fig14mentioning

confidence: 99%

“…From Cheverton et al (1980). t s ≤ 2 (distance to nearest loaded boundary)/stress wave velocity [1] The first wide plate crack arrest test was developed by Robertson (1953).…”

Section: Fig1mentioning

confidence: 99%

“…For nuclear applications, thermal shock experiments (TSEs) or pressurised thermal shock experiments (PTSEs) aim to simulate hypothetical loss of coolant accidents (LOCA) or steam line break accidents in pressurised water reactor vessels. In such events, a low temperature coolant is injected into the vessel, passing over the hot inner surface of the vessel and giving rise to the following effects (Cheverton et al, 1980;Pugh et al, 1991a):…”

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confidence: 99%

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Advances in Nuclear Science and Technology

2002

Advances in Nuclear Science and Technology

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PREFACEAs we close on the Millennium we also approach a half-century of nuclear power. The major peaceful application centres on the large-scale production of electricity but international politics in the last year has shown that we have not left the origins in nuclear weapons behind. Can we assess the future of nuclear technology in the coming century?Electricity remains the dominant role for nuclear technology, though we may recognise the valuable contributions of radio-isotope work to biology, agriculture, disease control, medical diagnostics and therapy in particular, with ramifications in most industries and civilised life. The supply of electricity from nuclear power remains of the order of 10% in the USA but rises to one-third in the UK and on to some 80% in France. Far Eastern countries still have a major construction program that might lead to them rivalling such figures. Indeed if we are to accept the majority judgement of scientists that global warming through, principally, carbon dioxide is a realistic threat, it is to be hoped that nuclear power will indeed be maintained and increased to balance the almost inevitable expansion of the use of coal by China in particular. Claims that countries such as Sweden will reduce CO2 emission and simultaneously reduce nuclear power seem but a chimera, lacking all technical credibility.The down-side remains, however. Not only is the world still threatened with nuclear weapons, by repute or even testing, but no country has had the political will to manage the disposal of radio-active wastes, not just the Achilles heel but the foot, shin and leg of nuclear power. Many scientists and engineers will suppose that this is solely a political problem, claiming that the technical solutions are available. Unfortunately, it makes it no less a problem and renders the prospect of continued, let alone expanded nuclear power, no less vulnerable for being political. And who amongst the technicians is wise to say that the atavistic public perception of the threat of nuclear power is irrational when sabre rattling by emerging weapons powers echoes throughout the world?We see an interesting parallel in the modern development of genetically engineered plants and animals, to be compared with the last halfcentury of nuclear power. In the bright dawn of the post-war nuclear age, the public by-and-large accepted the claims made for the promise of the cheap production of electricity but have largely turned, or been turned by the media, against nuclear power. Do we see the same hubris mounting for those microbiologists who dismiss risks of genetic contamination of agriculture or dismiss the change in insurance attitudes when the threads of DNA predict our future like the threads of the Fates, those Spinners of the Years? Take note of the history of Nuclear Power and prepare for the backlash.If trust is to be restored in the civil use of nuclear power, rational and careful study must be made of its problems, and the results made available publicly, as instanced by the first article in this ...

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“…Cheverton et al, 1980;Kanninen et al, 1985;Nilsson, 1986a, 1986b). This may not be the case, however, for experiments or structural situations where longer crack jumps are experienced.…”

Section: Fig14mentioning

confidence: 99%

“…From Cheverton et al (1980). t s ≤ 2 (distance to nearest loaded boundary)/stress wave velocity [1] The first wide plate crack arrest test was developed by Robertson (1953).…”

Section: Fig1mentioning

confidence: 99%

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confidence: 99%

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Advances in Nuclear Science and Technology

2002

Advances in Nuclear Science and Technology

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“…Their results showed that for heating at the free boundary crack opening (Mode I) and sliding modes (Mode II) were found at the crack tip, and for cooling at the free boundary only crack sliding mode was found at the crack tip. A coupled FEM analysis of transient thermal stresses, as opposed to the quasi-static formulation given in [36][37][38], is presented by Berkovic [39]. Using the Galerkin procedure, he derived finite element equations of motion and heat conduction employing Taylor's expansion in the time domain.…”

Section: List Of Tables Pagementioning

confidence: 99%

“…Cheverton, et al [36,48] used thick-walled steel cylinders with radial and longitudinal cracks on the inner surface.…”

Section: List Of Tables Pagementioning

confidence: 99%