The basic purpose of this handbook is to document a set of systematic procedures for providing information that can be used in performing valueimpact assessments of Nuclear Regulatory Commission (NRC) regulatory actions. The handbook describes a structured but flexible process for performing the assessment. Chapter 1 is an introduction to the value-impact assessment process. Chapter 2 describes the attributes most frequently affected by proposed NRC actions, provides guidance concerning the appropriate level of effort to be devoted to the assessment, suggests a standard format for documenting the assessment, and discusses the treatment of uncertainty. Chapter 3 contains detailed methods for evaluating each of the attributes affected by a regulatory action. The handbook has five appendixes containing background information, technical data, and example applications of the value-impact assessment procedures. This edition of the handbook focuses primarily on assessing nuclear power reactor safety issues.

SUPPLY OF THORI UM OXI DE, SHORT TONS OF TH02 FIGURE 1. lB. Domestic Thorium Supply Curve 500,000 illustrates high and low cost estimates for each deposit. Deposits are arrayed by plotting production costs in increasing order except for Lemhi Pass. The Lemhi Pass deposit shows a decrease in cost because Lemhi Pass is mined in two stages. Costs for the first stage of mining are higher because a lower grade of ore is developed. As mining progresses, higher grades of ore are accessed (second stage) and production costs decrease. The supply curve illustrates that sufficient amounts of thorium exist to supply a domestic thorium-reactor economy.

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The Residential Building Characteristics On-Site Inspection (RI) was sponsored by the Bonneville Power Administration (BPA), and implemented by Energy Counselors, Inc., of Beaverton, Oregon. The purpose of the inspection was to collect detailed information on the structural characteristics and capital equipment of residences participating in SPA's End-Use Load and Conservation Assessment Program (ELCAP).ELCAP is a long-term program to collect information on the structural characteristics of residences in the Pacific Northwest as well as the attitudinal, behavioral, and demographic characteristics of the residences' occupants. Combined with other data collection efforts, the information obtained by the RI will be used to assess and evaluate energy use and conservation within the region's residential sector. This report documents the design of the inspection instruments (forms), the implementation of the inspection, and some of the results from the data base. The number of residences inspected was 416 or 93% of the potential sample of 447 residences.The structural information gathered about each residence included detailed descriptions of each exterior wall, window, exterior door, foundation, ceiling/ roof, and floor. ihe capital equipment information included details on each residence's HVAC system(s), refrigerator, freezer, dishwasher, and hot water heater as well as the total number of other appliances. For residences having an accessible crawl space, a detailed inspection of the crawl space was performed to identify potential moisture and/or insect problems. Other, general information obtained in the inspection included the age of the house, the type of dwelling unit, ventilation information, the number of levels in the house, the occupied area and volume, the number of rooms in the residence, and any modifications and/or additions that had been made to the residence since August 1983. All of the above information has been encoded and entered into the Characteristics Data Base at PNL.

This report discusses a number of aspects of cost/benefit (C/B) analysis for in-service inspection (lSI} of pressurized water reactor (PWR) steam generators (SGs) and identifies several problem areas that must be addressed prior to a full C/B analysis capability.Following a brief review of the impact of SG problems on the productivity of PWR units and of the scope and variability of SG problems among U.S. PWRs, various occupational implications of SG lSI are considered, namely manpower, time, and rad exposure. The opportunities provided by refueling outages in respect to lSI frequency and work time windows are reviewed. Indices for characterizing the nondestructive testing {NOT) information, rad exposure, $ impact, and manpCM"er and time attributes of single ISis and a series of ISis over an arbitrary evaluation period are presented and calculated for a number of lSI cases using SG parameters for three typical PWR units.A comparison of the $ impact of unscheduled outages attributable to SG problems with the $cost of ambitious lSI strategies indicates that the $cost is virtually negligible for well-planned ISis. Considering the ALARA constraint on occupational rad exposure, the skilled manpower pool for NOT work appears to be the principal factor limiting lSI scope and frequency. Analysis of the manpower and time requirements for inspection of a 40-unit PWR population indicates, however, that an lSI strategy embodying two campaigns per year and a total population inspection within a 2-year interval is not far beyond current capabilities.v ACKNOWLEDGMENTS