Past Experience

• Developed event tree display & quantification computer code
• Performed NSSS event analysis for Zion/Indian Point PRAs
• Performed containment event tree analysis for Zion/Indian Point PRAs
• Developed & reviewed human performance analyses for Zion/Indian Point PRA Operator Actions
• Developed & presented PRA training module for STA training program
• Performed analysis of post-TMI changes to PORV-Related LOCA probability (WCAP-9804)
• Developed risk-based model for economic decision making
• Developed & presented nuclear engineering discipline PRA training program
• Developed & reviewed system PRA models for Midland PRA
• Developed & reviewed event sequence PRA models for Midland PRA
• Developed fire and hazardous chemical release PRA models for Midland PRA
• Performed PRA based tornado missile model analysis and optimized missile shielding
• Developed corporate-level PRA module on event sequence modeling
• Developed Failure Modes & Effects Analysis (FMEA) for the Palisades High Pressure Safety Injection (HPSI) System (CP0001)
• Reconstituted Fermi 2 Ultimate Heat Sink Cooling Tower Tornado Missile Strike Probability Licensing Basis (DE0003)

Publications & Papers

• "Adopting Risk Informed Techniques for Electrical Testing," IEEE Nuclear Science Symposium & Medical Imaging Conference, November 2002 by DA Horvath, GE Schinzel, G Ballassi, and TJ Riccio
• "Considerations for Adopting Risk Informed Techniques for Electrical Surveillance Testing (Future revision of IEEE 338)," International Topical Meeting on Probabilistic Safety Assessment, October 2002 by DA Horvath, GE Schinzel, G Ballassi, and TJ Riccio
• "Using Event Trees to Quantify the Effect of Post-TMI Modifications on PORV-Related LOCA Probability," ANS/ENS Topical Meeting on Probabilistic Risk Assessment Transactions, September 1981
• WCAP-9804, "Probabilistic Analysis and Operational Data in Response to NUREG-0737 Item II.K.3.2 for Westinghouse NSSS Plants," February 1981
• "A Comparison of the RADTRAN 5 and Riskind 1.11 Incident-Free Dose Models," Proceedings of Waste Management 2000 Symposium," March 2000, Tucson, AZ
• "Experimental Validation of the RADTRAN 5 Incident-Tree and Handler Dose Models," Transactions of the ANS, 14-18 November 1999, Long Beach, CA: 81(67): 67-68.
• "Risk Assessment for Sample WIPP and Yucca Mountain Shipments," Proceedings of the Waste Management '99 Symposium, March 1999, Tucson, AZ

• Assisted a fossil generation facility to identify and correct operational difficulties associated with electrostatic precipitators (UP1001).
• Assisted an electric utility to develop a life-cycle management system for their fossil generation plants, including establishment of a baseline boiler inspection and assessment program and a critical piping inspection program (IE1001, IE1002, IE1004).
• Provided design assistance to a fossil generation plant for expansion of its steam delivery system, including the evaluation of construction contractor bids (IE1003).

Information Management and Design Process Improvement

• Prepared nine program / topical design basis reconstitution reports in support of improving the future design process, turnover, training, cost effectiveness and litigation risk. Topics included power supply stability, fire protection, environmental operability and aging, internal and external hazards, electrical design standards, and loss of electric power (WE0001, IE0203, IE0205, IE0206, CP0001, and WE0004).
• Prepared five system oriented design basis reconstitution reports in support of improving the future design process, turnover, and training as well as cost effectiveness and liability. Topics included major cooling water systems, pressure control system, essential sampling system, service air system, and remote shutdown system. (DE0001, IE0204, and CP0006).
• Validated (verified) the proper implementation of design requirements compiled for six systems and programs including a major cooling system, plant shutdown system, internal and external hazards, environmental operability and aging, and fire protection. (DE0002, WE0001, and WE0004).

Design Reviews and Analyses

• Performed a failure modes and effects analysis (FMEA) on a high pressure cooling system (CP0001).
• Performed a technical review and update of a facility's environmental specifications (IE0102).
• Developed a "user friendly" approach for future updates of complying with regulations for performing aging assessments of critical facility equipment (TE0003).
• Performed a re-analysis of operability of critical equipment located in potential steam and moisture laden areas (TE0004).
• Developed four electrical equipment operability review documents (DE0004).
• Performed a major update of 102 electrical equipment operability review documents (TE0003, TE0004).
• For two different facilities, researched and prepared a detailed design basis report documenting the approaches used for assuring operability of critical equipment and for addressing corresponding regulatory requirements (IE0203).
• Developed 11 mechanical equipment operability review documents (DE0020).
• Participated on a management review team which assessed effectiveness of programs established for assuring operability of critical systems (OH0001).
• Prepared calculations to quantify the amount of time available to mitigate the effects of predetermined fire induced faults and wrote the top-level documents to be used as guidance for various fire scenarios (CP0003, WE0005)
• For two different facilities, researched and documented the bases for approaches used for meeting fire-related regulatory requirements (IE0206, WE0001, WE0003).
• Resolved fire-related design implementation issues (WE0002).
• Validated (verified) implementation of fire-related program requirements and commitments (WE0001).
• Constructed a hydraulic model of the fire-related deluge supply system and analyzed the system responses to particular scenarios of interest (WE0005).
• Analyzed the safety impact of a rupture of a major cooling pump's cooling coil on the operability of the component cooling water system (SC0101).
• Analyzed the conditions under which a pressure control system would require venting following a plant shutdown (SC0103).
• Performed a complex calculation of combined radiative and convective heat load (CP0001).
• Analyzed the accumulated impact of plant modifications on a facility's design margin (SC0101).
• Performed a feasibility study of an intended improvement modification to a major cooling system (SC0101).
• Performed a quantitative (probabilistic risk) study which verified the low risk of tornado missile damage to key systems at a power plant facility (DE0003).
• Analyzed the impact of a pressure instrument setpoint change on peak pressure following a steam line break within a facility (SC0106).
• Assisted a client in evaluating the cost and value impact of developing a computerized cross-reference system for retrieving design calculations (SC0103).
• Prepared a comprehensive calculational report which updated the design basis and analyzed the operability and effectiveness of a facility's ultimate heat removal system (DE0003).
• Prepared comprehensive design calculation revisions and engineering evaluations of existing conditions as part of a major update of the design bases for DC the electrical systems, the emergency cooling water systems, and the control air system (DE0003).
• Provided on-site assistance in support of motor-operated-valve (MOV) setpoint and thrust calculations, evaluation of test results, analysis of signature traces, and evaluation of actual installation conditions (SC0105, DE0006).
• Prepared engineering analyses demonstrating continued equipment operability and integrity on loss of HVAC (CP0003).
• Prepared four major service and cooling water system design requirement calculations (DE0007, DE0011).

Litigative and Regulatory Compliance Support

• Performed a third party technical overview of a comprehensive safety analysis report (SC0110).
• Provided a detailed technical and regulatory compliance assessment of the major safety analysis report amendment prepared as part of a client's validation project (SC0111).
• Facilitated a major update of a safety analysis report through research, reviews, supportive evaluations, interviews, and administrative form completion (DE0014).
• Assessed the effects of "beyond design basis" events (DE0021).
• Performed regulatory compliance consulting services for a research reactor facility (UM0001).

Quality Reviews, Auditing, and Other Program Support

• Developed and implemented an in-house ANSI/ASME NQA-1 Quality Assurance Program, approved by five clients, which includes heavy emphasis on training, flexible procedural controls, performance-based audits, and feedback mechanisms to identify opportunities for continuing improvement. [OVHD]
• Provided fire protection expertise as a member of a client's QA audit team (TU0001).
• Developed action plans and provided technical support during a client's regulatory inspection and subsequent programmatic quality assurance audits (IE0101, DE0008).
• Provided system design technical expertise to a client's QA staff for an internal audit (DE0013).

Management Consulting and Third Party Reviews

• Developed a comprehensive management action plan for improving the accuracy of a facility's regularly used essential drawings (IE0201).
• Assisted a management review team to evaluate and make recommendations concerning approaches used for backlog control and work-off (PR0001).
• Facilitated benchmarking meetings with several diverse organizations for a client attempting to upgrade its process for responding to emergent work, comment resolution, preparation of engineering procedures, development of calculations, and engineering quality monitoring (SC0108).
• Conducted a procedural effectiveness review (SC0107).
• Provided third party technical overview of a safety analysis report update project (SC0110).
• Participated on a Management Consulting Team which reviewed critical system operability effectiveness (OH0001).

Facility Operational Improvement

• Assisted a facility in identifying and correcting operational difficulties associated with electrostatic precipitators (UP1001).
• Assisted in developing a life-cycle management program for a client with multiple (six) operating facilities (IE1001, IE1002, IE1004).
• Provided design assistance for expansion of a client's steam delivery system, including the evaluation of construction contractor bids (IE1003).
• Prepared conceptual design and design modification for a high voltage fault relay protection system (TE0002).
• Prepared a fire protection system design change for a medical facility in Ann Arbor, Michigan (VA0001).
• Prepared a design change/construction specification package for a state of the art monitoring and control system for a medical facility in Battle Creek, Michigan (VA0002).