№ lp_1_2_23596
This document contains technical guidance for fire safety analysts regarding heat release rate (HRR) profiles and parameters for fixed and transient ignition sources in the context of fire protection significance determination.
Effective Date: January 1, 2025
Purpose: This attachment provides supporting information describing the heat release rate (HRR) profile (HRR versus time curve) parameters and HRR gamma distribution parameters for various fixed and transient ignition sources. The profiles and distribution parameters were used to develop the tables and plots in sets A, D, and E of Attachment 8 to the Fire Protection Significance Determination Process (SDP), IMC 0609 Appendix F. These tables and plots allow the analyst to look up the vertical and radial zone of influence (ZOI) (used in Step 2.3.2), severity factor (SF) (used in Step 2.6.1), and damage time (used in Step 2.7.1) for a specified fixed or transient ignition source, target type, and target location for fire damage state 1 (FDS1) scenarios. Guidance is also provided for determining the HRR of confined and unconfined oil fires, cable tray fires, and hot work fires.
Year: 2025
Note: Region / City
Subject: Fire Ignition Sources, Heat Release Rate, Fire Protection
Document Type: Technical Manual
Organization / Institution: NRC
Target Audience: Fire Safety Analysts, Engineers
Period of Effectiveness: From January 1, 2025
Price: 8 / 10 USD
The file will be delivered to the email address provided at checkout within 12 hours.

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