Detailed Fire Modeling (Task 11) - Revision history

User at 02:15, 11 December 2024

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User at 01:19, 11 December 2024

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User: /* Fire Models Included in V&V Guidance */

2021-11-10T15:51:58Z

Fire Models Included in V&V Guidance

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 |-
 | colspan="8" style="background-color:#ffffff; border-bottom: 0.5px solid white; border-left: 0.5px solid white; border-right: 0.5px solid white;" | <div id="ECabNote" style="font-size:88%; margin-right: 2em; margin-left: 2em; text-indent: -1em;">[[#ECabLoc|&Dagger;]] ''Electrical fires include non-cabinet electrical sources, such as electrical motors, indoor transformers, and junction boxes, among other electrical equipment.''</div>
 |}

@@ Line 1,060: / Line 1,060: @@
 |-
 | HEAFs
-| style="text-align: center;" | 11
+| style="text-align: center;" | 15
-| style="text-align: center;" | 385
+| style="text-align: center;" | 576
-| style="text-align: center;" | 0.029
+| style="text-align: center;" | 0.026
 | style="text-align: center;" | 0.016
-| style="text-align: center;" | <div id="028"></div>0.028[[#028Note|<sup>^</sup>]]
+| style="text-align: center;" | 0.025
-| style="text-align: center;" | 0.044
+| style="text-align: center;" | 0.038
-| [https://www.nrc.gov/docs/ML1807/ML18075A086.html FAQ&nbsp;17&#8209;0013]
+| [https://www.epri.com/research/products/000000003002025942 NUREG-2262]
 |-
 | All fires

@@ Line 1,084: / Line 1,084: @@
 [https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr2180/ NUREG&#8209;2180] NRC guidance on crediting incipient detection systems in fire PRA is discussed in NUREG&#8209;2180. The issuance of NUREG&#8209;2180 retires FAQ&nbsp;08&#8209;0046 (Chapter&nbsp;13 of NUREG/CR&#8209;6850 Supplement&nbsp;1) as documented in the [https://www.nrc.gov/docs/ML1616/ML16167A444.pdf July 1, 2016 letter to NEI].
-In 2024, EPRI and the NRC updated the alpha and pi parameters of the NUREG-2180 event tree in [https://www.epri.com/research/products/000000003002028821 NUREG-2180 Supplement 1]. Additionally, NUREG-2180 Supplement 1 provided guidance on how to use NUREG-2180 with the framework in NUREG-2230.Table 4-2, reproduced below provide the most recent alpha factors from NUREG-2180.
+In 2024, EPRI and the NRC updated the alpha and pi parameters of the NUREG-2180 event tree in [https://www.epri.com/research/products/000000003002028821 NUREG-2180 Supplement 1]. Additionally, NUREG-2180 Supplement 1 Section 5 provides guidance on how to use NUREG-2180 with the framework in NUREG-2230. In summary, the concepts in [https://www.epri.com/#/pages/product/000000003002016051/ NUREG&#8209;2230] (interruptible fires) and NUREG-2180 (pre-flaming conditions) are considered independent.
 {| class=wikitable
 |+ style="text-align: left;" | Fraction of fires in NUREG-2180 Supp. 1 that do not have an incipient phase
@@ Line 1,097: / Line 1,099: @@
 | style="text-align: center;" | Low-voltage control cabinets
 | style="text-align: center;" | 0.10 (0.01/0.25)
 |}

← Older revision		Revision as of 01:19, 11 December 2024
Line 1,084:		Line 1,084:
	[https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr2180/ NUREG‑2180] NRC guidance on crediting incipient detection systems in fire PRA is discussed in NUREG‑2180. The issuance of NUREG‑2180 retires FAQ 08‑0046 (Chapter 13 of NUREG/CR‑6850 Supplement 1) as documented in the [https://www.nrc.gov/docs/ML1616/ML16167A444.pdf July 1, 2016 letter to NEI].		[https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr2180/ NUREG‑2180] NRC guidance on crediting incipient detection systems in fire PRA is discussed in NUREG‑2180. The issuance of NUREG‑2180 retires FAQ 08‑0046 (Chapter 13 of NUREG/CR‑6850 Supplement 1) as documented in the [https://www.nrc.gov/docs/ML1616/ML16167A444.pdf July 1, 2016 letter to NEI].

−	In 2024, EPRI and the NRC updated the alpha and pi parameters of the NUREG-2180 event tree in [https://www.epri.com/research/products/000000003002028821 NUREG-2180 Supplement 1]. Additionally, NUREG-2180 Supplement 1 provided guidance on how to use NUREG-2180 with the framework in NUREG-2230.	+	In 2024, EPRI and the NRC updated the alpha and pi parameters of the NUREG-2180 event tree in [https://www.epri.com/research/products/000000003002028821 NUREG-2180 Supplement 1]. Additionally, NUREG-2180 Supplement 1 provided guidance on how to use NUREG-2180 with the framework in NUREG-2230.Table 4-2, reproduced below provide the most recent alpha factors from NUREG-2180.
		+	{\| class=wikitable
		+	\|+ style="text-align: left;" \| Fraction of fires in NUREG-2180 Supp. 1 that do not have an incipient phase
		+	\|-
		+	! scope="col" style="width: 250px;" \| Category
		+	! scope="col" style="width: 250px;" \| Mean Alpha Fraction (5<sup>th</sup>/95<sup>th</sup>)
		+	\|-
		+	\|-
		+	\| style="text-align: center;" \| Power cabinets
		+	\| style="text-align: center;" \| 0.41 (0.30/0.53)
		+	\|-
		+	\| style="text-align: center;" \| Low-voltage control cabinets
		+	\| style="text-align: center;" \| 0.10 (0.01/0.25)
		+	\|}

← Older revision		Revision as of 01:03, 11 December 2024
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	===Incipient Detection===		===Incipient Detection===
	[https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr2180/ NUREG‑2180] NRC guidance on crediting incipient detection systems in fire PRA is discussed in NUREG‑2180. The issuance of NUREG‑2180 retires FAQ 08‑0046 (Chapter 13 of NUREG/CR‑6850 Supplement 1) as documented in the [https://www.nrc.gov/docs/ML1616/ML16167A444.pdf July 1, 2016 letter to NEI].		[https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr2180/ NUREG‑2180] NRC guidance on crediting incipient detection systems in fire PRA is discussed in NUREG‑2180. The issuance of NUREG‑2180 retires FAQ 08‑0046 (Chapter 13 of NUREG/CR‑6850 Supplement 1) as documented in the [https://www.nrc.gov/docs/ML1616/ML16167A444.pdf July 1, 2016 letter to NEI].
		+
		+	In 2024, EPRI and the NRC updated the alpha and pi parameters of the NUREG-2180 event tree in [https://www.epri.com/research/products/000000003002028821 NUREG-2180 Supplement 1]. Additionally, NUREG-2180 Supplement 1 provided guidance on how to use NUREG-2180 with the framework in NUREG-2230.

@@ Line 76: / Line 76: @@
 ===Fire Models Included in V&V Guidance===
-[https://www.epri.com/#/pages/product/000000003002000830/?lang=en-US EPRI FIVE]
+EPRI FIVE
 [https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1805/ NRC Fire Dynamics Tools - NUREG&#8209;1805]

@@ Line 128: / Line 128: @@
 NUREG&#8209;2233 / EPRI&nbsp;3002018231 also recommends fire modeling parameters including fire growth and decay parameters,  yields of minor products of combustion, heat of combustion, and the physical size and effective elevation of the fire.
-| [https://www.epri.com/#/pages/product/3002016054/ NUREG&#8209;2233 / EPRI&nbsp;3002018231]
+| [https://www.epri.com/#/pages/product/3002018231/ NUREG&#8209;2233 / EPRI&nbsp;3002018231]
 [https://www.epri.com/#/pages/product/3002015997/ NUREG&#8209;2232 / EPRI&nbsp;3002015997]
@@ Line 219: / Line 219: @@
 | The transient HRR is recommended for Bin&nbsp;13 dryer fires (refer to Table&nbsp;11&#8209;1 of NUREG/CR&#8209;6850). NUREG&#8209;2233 / EPRI&nbsp;3002018231 provides updated HRR distribution and zones of influence for generic transient fires (see also [[#FMBin3|Bin&nbsp;3]]).
-| [https://www.epri.com/#/pages/product/3002016054/ NUREG&#8209;2233 / EPRI&nbsp;3002018231]
+| [https://www.epri.com/#/pages/product/3002018231/ NUREG&#8209;2233 / EPRI&nbsp;3002018231]
 [https://www.nrc.gov/reading-rm/doc-collections/nuregs/contract/cr6850/s1/cr6850s1.pdf NUREG/CR&#8209;6850 / EPRI&nbsp;1011989]
@@ Line 807: / Line 807: @@
 ===Transients (NUREG&#8209;2233)===
-[https://www.epri.com/#/pages/product/3002016054/ NUREG&#8209;2233 / EPRI&nbsp;3002018231] provides HRR distributions for both generic and "transient combustible control location" (TCCL) type transient fires. The report also provides values for total energy release (TER) and zones of influence (ZOIs), but only HRRs are included here.
+[https://www.epri.com/#/pages/product/3002018231/ NUREG&#8209;2233 / EPRI&nbsp;3002018231] provides HRR distributions for both generic and "transient combustible control location" (TCCL) type transient fires. The report also provides values for total energy release (TER) and zones of influence (ZOIs), but only HRRs are included here.
 :{| class="wikitable"
 |+ '''Transients'''