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in subjects: "Bn-350 Reactor"

open access

Immobilization of Cesium Traps from the BN-350 Fast Reactor (Aktau, Kazakhstan)

During BN-350 reactor operations and also during the initial stages of decommissioning, cesium traps were used to decontaminate the reactor’s primary sodium coolant. Two different types of carbon-based trap were used – the MAVR series, low ash granulated graphite adsorber (LAG) contained in a carrier designed to be inserted into the reactor core during shutdown; and a series of ex-reactor trap accumulators(TAs) which used reticulated vitreous carbon (RVC) to reduce Cs-137 levels in the sodium a… more

Date: March 1, 2011

Creator: Michelbacher, J. A.; Knight, C.; Romanenko, O. G.; Tazhibaeva, I. L.; Yakovlev, I. L.; Rovneyko, A. V. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Experiments Performed in Substantiation of the Conditioning of BN-350 Spent Cesium Traps Using Lead or Lead-Bismuth Alloy Filling Technology

The technology of cleaning cesium radionuclides from sodium coolant at the BN-350 fast reactor was realized in the form of cesium traps of two types: stationary devices connected to the circuit that was to be cleaned and in-core devices installed into the core of reactor when it was not under operation. Carbon-graphite materials were used as sorbents to collect and concentrate radioactive cesium, accumulated in the BN-350 reactor circuits over the decades of their operation, in relatively small… more

Date: May 1, 2009

Creator: Romanenko, O.; Tazhibaeva, I.; Yakovlev, I.; Ivanov, A.; Wells, D.; Herrick, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

International Collaboration with the Shutdown of the BN-350 Reactor

Representatives from the United States and the United Kingdom discussed areas where collaboration on the shutdown of the BN-350 Reactor in Aktau, Kazakhstan would benefit not only Kazakhstan, but would also help to assure the successful shutdown of the reactor. A fundamental understanding of the basis for collaboration has been for each side to ‘add value’ to each of the project areas, rather than simply substitute for each other’s experience. This approach has brought distinct technical and ma… more

Date: August 1, 2005

Creator: Michelbacher, J. A.; Wells, P. B.; Organ, N. & Wells, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Upgrades to the access controls at the BN-350 reactor in Aktau, Kazakstan

In December of 1993, the governments of the US and Kazakstan entered into an agreement concerning the control, accounting and physical protection of nuclear material in order to promote the prevention of nuclear weapons proliferation. It was jointly determined that the BN-350 reactor in Aktau, Kazakstan had a significant quantity of nuclear material which warranted increased physical protection. After on-site surveys and cooperative analyses, the access control in the lobby of the reactor build… more

Date: July 1, 1997

Creator: Anikin, V.; Mason, J.; Moore, D.; Case, R.; Berry, B. & Steele, B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Application of nondestructive assay techniques in Kazakstan

As Kazakstan has transitioned from being part of the Soviet Union to a nonweapons state (Treaty of Nonproliferation of Nuclear Weapons [NPT] signatory) under International Atomic Energy Agency (IAEA) inspections, significant changes have been required. Some of these changes have occurred in nuclear material protection, control, and accounting at the four nuclear facility sites in the Republic of Kazakstan. Specifically, the Republic of Kazakstan has changed from relying primarily on a subset of… more

Date: November 1, 1997

Creator: Sprinkle, J. K. Jr.; Butler, G. & Collins, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Criticality safety issues in the disposition of BN-350 spent fuel

A criticality safety analysis has been performed as part of the BN-350 spent fuel disposition project being conducted jointly by the DOE and Kazakhstan. The Kazakhstan regulations are reasonably consistent with those of the DOE. The high enrichment and severe undermoderation of this fast reactor fuel has significant criticality safety consequences. A detailed modeling approach was used that showed some configurations to be safe that otherwise would be rejected. Reasonable requirements for desig… more

Date: February 28, 2000

Creator: Schaefer, R. W.; Klann, R. T.; Koltyshev, S. M. & Krechetov, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Department of Energy Nuclear Material Protection, Control, and Accounting Program at the Mangyshlak Atomic Energy Complex, Aktau, Republic of Kazakhstan

As part of the Cooperative Threat Reduction Nuclear Material Protection, Control, and Accounting (MPC and A) Program, the US Department of Energy and Mangyshlak Atomic Energy Complex (MAEC), Aktau, Republic of Kazakstan have cooperated to enhance existing MAEC MPC and A features at the BN-350 liquid-metal fast-breeder reactor. This paper describes the methodology of the enhancement activities and provides representative examples of the MPC and A augmentation implemented at the MAEC.

Date: August 1, 1998

Creator: Case, R.; Berry, R.B. & Eras, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A FAST BREEDER REACTOR SPENT FUEL MEASUREMENTS PROGRAM FOR BN-350 REACTOR

A project to verify the fissile content of fast breeder reactor spent nuclear fuel is underway in the Republic of Kasakhstan. There are a variety of assembly types with different irradiation histories and profiles in the reactor that require a variety of measurement and analysis procedures. These procedures will be discussed and compared as will the general process that has been designed to resolve any potential measurement discrepancies. The underwater counter is part of a system that is desig… more

Date: April 1, 1999

Creator: STAPLES, P.; HALBIG, J. & AL, ET

Item Type: Article

Partner: UNT Libraries Government Documents Department