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in publisher: "UKAEA Atomic Energy Establishment, Winfrith"

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PFR/TREAT Tests L04 and L06: irradiated versus fresh LMFBR fuel under TUCOP accident conditions

Test L06, closely following L04 in the PFR/TREAT series, was a multi-pin simulation of a LMFBR transient under cooling/overpower (TUCOP) accident using full-length prototypic UK fast reactor fuel. In L04 the test fuel had been pre-irradiated to effect some fuel restructuring and fission gas retention. By contrast, in L06 the test fuel ws fresh. The pre-failure test fuel power and coolant flow histories in L04 were duplicated as closely as possible in L06 to make the L04/L06 pair a direct compar… more

Date: January 1, 1984

Creator: Bauer, T. H.; Tylka, J. P.; Fink, C. L.; Stanford, G. S.; Wright, A. E. & Herbert, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Comparison of L04, L05, and L07: three irradiated 7-pin bundle TUCOP tests. [LMFBR]

Four transient-undercooling-driven overpower (TUCOP) tests on seven-pin bundles have been performed in the PFR/TREAT program. All were on full-length, bottom-plenum UK-design fuel. Three of them (tests L04, L05, and L07) tested sibling fuel elements having had the same preirradiation in PFR; one (L06) tested fresh fuel. The three tests on preirradiated fuel were designed to determine the differences in the motions of reactor-core materials that would result from the variation in power-to-flow m… more

Date: January 1, 1984

Creator: Wright, A. E.; Robinson, W. R.; Bauer, T. H.; Klickman, A. E.; Woods, W. J.; Cooper, A. A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fuel motion induced by a sharp burst TUCOP: PFR/TREAT test L07

In the transient-undercooling-driven overpower (TUCOP) accident scenario for moderate-to-high-sodium-void-worth-LMFBR cores, some computer codes predict large reactivity increases caused by compactive in-pin fuel motion in low power subassemblies during a power burst resulting from sodium voiding in the lead fuel subassemblies. In this hypothetical scenario, the low power subassemblies are predicted to experience midplane failure with relatively cold cladding, which inhibits radial dispersal an… more

Date: January 1, 1985

Creator: Robinson, W. R.; Doerner, R. C.; Morman, J. A.; Bauer, T. H. & Herbert, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Post-failure material movement in the PFR/TREAT experiments

In the PFR/TREAT experiments the fast neutron hodoscope has provided experimental data on post-failure material movement during Transient Overpower and Transient Under-Cooled Overpower events. Analyses of selected experiments have been done, using SIMMER-II and SAS4A, to validate these codes. Full results of these analyses are presented in the paper. The general conclusion that can be drawn from the analyses that have been made so far is that the hodoscope is providing data which has appropriat… more

Date: January 1, 1986

Creator: Bauer, T. H.; Morman, J. A.; Hill, D. J.; DeVolpi, A. & Goldman, A. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Seven pin bundle fast top tests L01 and L02. [LMFBR]

Tests L01 and L02 were the first two seven pin bundle tests in the PFR/TREAT program of fuel failure tests carried out jointly by the US and the UK. The two tests were on bottom plenum annular pellet mixed oxide fuel clad in 316 stainless steel. L01 used fresh fuel, while L02 used PFR irradiated 4% burn-up fuel, to determine any differences in the failure mechanism and subsequent fuel behavior due to irradiation. They were performed in flowing sodium in the Mark IIIA version of a TREAT integral… more

Date: January 1, 1984

Creator: Davies, A. L.; Bowen, G. R.; Herbert, R.; Kear, K. L.; Tylka, J. P. & Holland, J. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Progress and future plans in the PFR/TREAT safety testing programs

This paper briefly describes the progress to date on the joint UKAEA/USDOE program of fast reactor fuel safety testing and the definition of the future tests. The program involves transient tests in the TREAT reactor on fresh and irradiated mixed fuel pins. The tests simulate transient overpower (TOP) accidents, which result from an unintentional addition of reactivity and transient undercooling followed by overpower (TUCOP) accidents, which arise from an unintentional stoppage of the primary s… more

Date: January 1, 1986

Creator: Alter, H.; Cowking, C. B.; Klickman, A. E. & Wood, M. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

TRAC-PF1/MOD1 post-test calculations of the OECD (Organisation for Economic Co-operation and Development) LOFT experiment LP-SB-2

An analysis of the OECD-LOFT-LP-SB-2 experiment making use of TRAC-PF1/MOD1 is described in the report. LP-SB2 experiment studies the effect of a delayed pump trip in a small break LOCA scenario with a 3 inches equivalent diameter break in the hot leg of a commercial PWR operating at full power. The experiment was performed on 14 July 1983 in the LOFT facility at the Idaho National Engineering Laboratory under the auspices of the Organization for Economic Co-operation and Development (OECD). Th… more

Date: December 1, 1990

Creator: Pelayo, F. (UKAEA Atomic Energy Establishment, Winfrith (UK))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fuel pin failure in the PFR/TREAT experiments

The PFR/TREAT safety testing programme involves the transient testing of fresh and pre-irradiated UK and US fuel pins. This paper summarizes the experimental and calculational results obtained to date on fuel pin failure during transient overpower (resulting from an accidental addition of resolivity) and transient undercooling followed by overpower (arising from an accidental stoppage of the primary sodium circulating pumps) accidents. Companion papers at this conference address: (I) the progre… more

Date: January 1, 1986

Creator: Herbert, R.; Hunter, C. W.; Kramer, J. M.; Wood, M. H. & Wright, A. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PFR/TREAT CO1 and LO1 experiments

The CO1 and LO1 TREAT experiments were the first two in a series of international fast-reator safety experiments to be conducted as part of the PFR/TREAT program being performed by the US and the UK. Conditions for these two experiments simulated a large fast-reactor hypothetical 5$/second (150 ms period) transient overpower (TOP) accident. The CO1 configuration was a single fuel pin in a NaK filled capsule while LO1 used a seven-pin bundle in a flowing-sodium loop. The fuel pins in both experi… more

Date: January 1, 1982

Creator: Tylka, J. P.; Wright, A. E.; Pember, L. A.; Culley, G. C.; Davies, A. L.; Herbert, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PFR/TREAT Program: Objectives, Accomplishments, and Plans.

The PFR-TREAT collaborative program of transient safety testing of fast reactor fuel was established in 1979 to provide mutual advantage to USDOE and the UKAEA through irradiation of US and UK full-length fuel pins in PFR, followed by safety testing in TREAT. The tests which were planned include Transient Over-Power (TOP) and Transient Under-Cooling with Over-Power (TUCOP) tests to fuel destruction and re-distribution; the results will provide significant new information on fuel and cladding be… more

Date: January 1, 1984

Creator: Cowking, C. B.; Alter, H.; Stillwell, J.; Wood, M. H.; Woods, W. J.; Culley, G. E. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PFR/TREAT Programme: Objectives, Progress and Future Work

The PFR/TREAT collaborative program of fast-reactor fuel testing is described and the objectives are illustrated in terms of the parameters selected for the irradiation of US and UK full-length fuel pins in PFR, followed by safety testing in TREAT. The measurements being made before, during, and after testing are outlined and the equipment and facilities being used in the UK and USA are described. An outline is given of the progress made and results obtained since the beginning of the collabora… more

Date: January 1, 1982

Creator: Cowking, C. B.; Alter, H.; Hewison, R.; Borys, S. S.; Wood, M. H.; Culley, G. E. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department