Performance entitlement of supercritical steam bottoming cycle

27 December 2013

​This technical brief draws upon the second-law based exergy concept to rigorously quantify the performance entitlement of a supercritical high-pressure boiler section in a heat recovery steam generator utilizing the exhaust of a gas turbine to generate steam for power generation in a steam turbine.

Selection of chemical hazard prediction models for plant safety and control room habitability evaluations

27 August 2013

Assuring the protection of people and the environment from unnecessary exposure to radiation is of great concern to nuclear electric power generators and regulators. In order to secure and maintain a license for operation of a nuclear power plant in the United States, the applicant is required to assess postulated scenarios to determine if an accidental chemical release either onsite or offsite will result in a design-basis event. When determining design-basis events, accident categories such as fire, explosion and/or toxic vapor cloud formation are considered.

Alternative design approach for thermal effects

27 August 2013

This paper provides an alternative design approach for thermal effects. Unlike the conventional approaches used in ACI 349 and ACI 359, where the main emphasis was given for estimating thermal loads and combining them with mechanical loads, the proposed design approach calculates thermal loads on the basis of design strengths. 

Reference rock site condition for central and eastern North America

23 August 2013

This study provides recommendations for the S- and P-wave velocity, site attenuation, and unit weight of the reference rock for Central and Eastern North America. The reference rock condition defines the boundary between the site specific amplification and the regional ground motion model. A consistent definition of this boundary across models allows for models of site amplification and ground motion to be developed independently.

Bechtel National, Inc.'s Michael Graham speaks before the Subcommittee on Financial and Contracting Oversight, U.S. Senate, June 27, 2013

27 June 2013

Michael Graham speaks about the largest and most complex DOE project; the Waste Treatment Plant in Hanford, Washington. This one-of-a-kind project includes a complex of facilities being designed and built to immobilize the highly radioactive waste stored in 177 aging underground tanks. Some of the tanks date back to World War II and 67 have been reported to have leaked. WTP will immobilize the waste using a process known as vitrification, which mixes the solid and liquid waste with molten glass to safely isolate the waste from the environment.

What is the Worth of 1 Btu/kWh of Heat Rate?

06 June 2013

An enhanced screening algorithm for power generation system total ownership cost (capital and operating) and thermal performance (output and efficiency) simplifies the analysis.

 

Optimization of water usage at construction camps

27 May 2013

This investigation identified that water consumption practices in camps were not fully understood and no consistent standards were being employed, contributing to errors in sizing water supply systems in camps.  This paper details the water conservation evaluation alternatives and cost/benefit analysis based on current and predicted water usage for Mining & Metals projects.  

WTP makes major progress in 2013

27 March 2013

The Bechtel National Inc. team designing, building, and commissioning the Hanford Waste Treatment Plant (WTP) reported several major accomplishments in 2013.

Dam break analysis applied to tailings dams

27 February 2013

The manuscript provides a workshop summary that can be seen as the framework for a “state-of-practice” document. The purpose(s) of break analysis, methods used, and documentation of important assumptions are addressed. Commentary citing concerns raised during and after the workshop are also included as it was clear that our ability to conduct accurate and realistic dam break analyses is limited.