16 Matching Results

Search Results

Advanced search parameters have been applied.

in creator/contributor: "Silady, F. A."

open access

Safety aspects of the Modular High-Temperature Gas-Cooled Reactor (MHTGR)

The Modular High-Temperature Gas-Cooled Reactor (MHTGR) is an advanced reactor concept under development through a cooperative program involving the US Government, the nuclear industry and the utilities. The design utilizes the basic high-temperature gas-cooled reactor (HTGR) features of ceramic fuel, helium coolant, and a graphite moderator. The qualitative top-level safety requirement is that the plant's operation not disturb the normal day-to-day activities of the public. The MHTGR safety re… more

Date: August 1, 1989

Creator: Silady, F.A. & Millunzi, A.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

MHTGR licensing approach and plant response to off normal events

The MHTGR design meets stringent top-level regulatory and user safety requirements that require that the normal and off-normal operation of the plant not disturb the public's day-to-day activities. Quantitative, generic top-level regulatory criteria have been specified from US NRC and EPA sources to guide the design. A probabilistic risk assessment has been utilized to select licensing basis events that cover a wide spectrum of events. The MHTGR fuel has been designed to limit the primary circu… more

Date: October 1, 1986

Creator: Neylan, A. J. & Silady, F. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Treatment of operator actions in the HTGR risk assessment study

Methods are presented for the treatment of operator actions, developed in the AIPA risk assessment study. Some examples are given of how these methods were applied to the analysis of potential HTGR accidents. Realistic predictions of accident risks required a balanced treatment of both beneficial and detrimental actions and responses of human operators and maintenance crews. Th essential elements of the human factors methodology used in the AIPA study include event tree and fault tree analysis,… more

Date: December 1979

Creator: Fleming, K. N.; Silady, F. A. & Hannaman, G. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Licensing Experience of the Modular High-Temperature Gas-Cooled Reactor (MHTGR)

The MHTGR is an advanced reactor concept being developed under a cooperative program involving the US Government, the nuclear industry, and the utilities. The design utilizes the basic HTGR features of ceramic fuel, helium coolant, and a graphite moderator. However, the specific size and configuration are selected to utilize the inherent characteristics of these materials to develop passive safety features that provide a significantly higher margin of safety than current generation reactors. Th… more

Date: September 1, 1988

Creator: Silady, F.A.; Cunliffe, J.C. & Walker, L.P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

HTGR Safety Research Program

An HTGR safety research program is being performed supporting and guided in priorities by the AIPA Probabilistic Risk Study. Analytical and experimental studies have been conducted in four general areas where modeling or data assumptions contribute to large uncertainties in the consequence assessments and thus, in the risk assessment for key core heat-up accident scenarios. Experimental data have been obtained on time-dependent release of fission products from the fuel particles, and plateout c… more

Date: August 1, 1980

Creator: Barsell, A. W.; Olsen, B. E. & Silady, F. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Innovative safety features of the modular HTGR

In this document the innovative safety features of the MHTGR are reviewed by examining the safety response to events challenging the functions relied on to retain radionuclides within the coated fuel particles. A broad range of challenges to core heat removal are examined, including a loss of helium pressure and a simultaneous loss of forced cool of the core.

Date: April 1, 1992

Creator: Silady, F. A. & Simon, W. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Innovative safety features of the modular HTGR

The Modular High Temperature Gas-Cooled Reactor (MHTGR) is an advanced reactor concept under development through a cooperative program involving the US Government, the nuclear industry, and the utilities. Near-term development is focused on electricity generation. The top-level safety requirement is that the plant's operation not disturb the normal day-to-day activities of the public. Quantitatively, this requires that the design meet the US Environmental Protection Agency's Protective Action G… more

Date: January 1, 1992

Creator: Silady, F.A. & Simon, W.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Innovative safety features of the modular HTGR

The Modular High Temperature Gas-Cooled Reactor (MHTGR) is an advanced reactor concept under development through a cooperative program involving the US Government, the nuclear industry, and the utilities. Near-term development is focused on electricity generation. The top-level safety requirement is that the plant`s operation not disturb the normal day-to-day activities of the public. Quantitatively, this requires that the design meet the US Environmental Protection Agency`s Protective Action G… more

Date: January 1, 1992

Creator: Silady, F. A. & Simon, W. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Innovative safety features of the modular HTGR. Revision 1

Date: April 1, 1992

Creator: Silady, F. A. & Simon, W. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Safety and licensing of MHTGR (Modular High Temperature Gas Cooled Reactor)

The Modular High Temperature Gas Cooled Reactor (MHTGR) design meets stringent top-level regulatory and user safety requirements that require that the normal and off-normal operation of the plant not disturb the public's day-to-day activities. Quantitative, top-level regulatory criteria have been specified from US NRC and EPA sources to guide the design. The user/utility group has further specified that these criteria be met at the plant boundary. The focus of the safety approach has then been … more

Date: July 1, 1987

Creator: Silady, F.A.; Millunzi, A.C.; Kelley, A.P. Jr. & Cunliffe, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A vented low pressure containment strategy for the Modular High Temperature Gas-Cooled Reactor (MHTGR)

This paper presents the response of the 450 MW(t) MHTGR with a steam turbine power conversion system to expected and hypothetical accident source term assumptions. A range of vented low pressure containment (VLPC) strategies was considered that would enhance the retention of radionuclides. This study was prepared to review the technical merits of VLPC options in response to an NRC request during preapplication review of the steam cycle MMGR. The study found that, even under arbitrary hypothetic… more

Date: April 1, 1994

Creator: Dilling, D.; Dunn, T. D. & Silady, F. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Impact of increasing MHTGR power on passive heat removal

In 1990 a cost reduction study recommended that the reference US MHTGR module design be changed to an 84-column, 450 MW(t) annular reactor core to attain improved economics with the same high level of safety as the previous reference 66-column, 350 MW(t) MHTGR module. The objective of this paper is to report on a recently completed core configuration trade study that reviewed the basis for that recommendation with more detailed assessments. The trade study examined alternate core configurations… more

Date: July 1, 1992

Creator: Dunn, T. D.; Schwartz, A. A. & Silady, F. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The gas turbine-modular helium reactor (GT-MHR), high efficiency, cost competitive, nuclear energy for the next century

The Gas Turbine-Modular Helium Reactor (GT-MHR) is the result of coupling the evolution of a small passively safe reactor with key technology developments in the US during the last decade: large industrial gas turbines, large active magnetic bearings, and compact, highly effective plate-fin heat exchangers. The GT-MHR is the only reactor concept which provides a step increase in economic performance combined with increased safety. This is accomplished through its unique utilization of the Brayt… more

Date: April 1, 1994

Creator: Zgliczynski, J. B.; Silady, F. A. & Neylan, A. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Impact of increasing MHTGR power on passive heat removal

Date: July 1, 1992

Creator: Dunn, T. D.; Schwartz, A. A. & Silady, F. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

GT-MHR design, performance, and safety

The Gas Turbine-Modular Helium Reactor (GT-MHR) is the result of coupling the evolution of a low power density passively safe modular reactor with key technology developments in the U.S. during the last decade: large industrial gas turbines; large active magnetic bearings; and compact, highly effective plate-fin heat exchangers. This is accomplished through the unique use of the Brayton cycle to produce electricity with the helium as primary coolant from the reactor directly driving the gas tur… more

Date: November 1, 1994

Creator: Neylan, A. J.; Shenoy, A.; Silady, F. A. & Dunn, T. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Operator role in the Modular High-Temperature Gas-Cooled Reactor's safety approach

This paper summarizes the approach of the Standard Modular High-Temperature Gas-Cooled Reactor (MHTGR) program to determine the role of the operator, discusses the safety role of the operator, and reviews the safety role of the operator with respect to the NRC Advanced Reactor Policy. 4 refs.

Date: September 1, 1991

Creator: Dunn, T.D.; Silady, F.A.; Zgliczynski, J.B. & Datta, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department