ML102870337
| ML102870337 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 09/20/2010 |
| From: | Chris Miller - No Known Affiliation |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2010-0116 | |
| Download: ML102870337 (5) | |
Text
Data Request #108 - Estimated vacuum achievable with purge fan It was reported by Dave Jones (former CR3 operator) that an event occurred in the late 1980's or early 1990's during which a purge exhaust fan was operating with the inlet purge valve closed. This resulted in a vacuum in the containment building. The exact date of the event could not be determined, so retrieving the RB pressure strip chart to determine the resulting RB pressure is not practical.
An alternate method of determining the resulting RB pressure is to estimate a "worst case" vacuum based on system performance. The CR3 purge fans (AHF-7A/7B) are Joy Manufacturing model 36-26.5-1770 axial vane fans. The fan curve for these units are contained in vendor manual VTMA 231 (curve attached). The design point for the fans is 25000 cfm @ 10" wg with a blade setting of 1. The fans are connected to the containment building through a series of ductwork, filters, and dampers, and exhaust to the atmosphere.
If the fan curve is extrapolated to dead head (no flow) conditions, the maximum total pressure developed by the fan is approximately 12" wg. If the pressure loss in the ventilation system is conservatively neglected, the maximum vacuum would be equal to the atmospheric pressure minus the total pressure imparted by the fan. Since 12" wg is equal to approximately 0.433 psi, the RB vacuum wouldhave been less than 0.5 psi. If the maximum total pressure of the fan is doubled to account for uncertainty of the extrapolation method, the vacuum would have been less than 1 psi.
Craig Miller P/5
THE DRAWINGS CONTAINED IN THIS MANUAL MAY Xýj" BE THE LATEST REVISION. CHECK THE FPC DRAWING SYSTEM TO DETERMINIE IF A LATER REVISION EXISTS.
FLORIDA POWER CORPORATION CRYSTAL RIVER PLANT UNIT #3 RED LEVEL, FLORIDA ATTENTION:
MR. C. JACKSON FL-ORIDA POWER OPRTO NCRYEAL ENINERING DEPARTMENT CRYSAL RVER - UNIT 3 EiNS7RUCTION IWANUAL Mo.
REI/MAR N~o.___________
Equip. Tag No. AL 7l/
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([As Int ýA 4AJUL This I"Struction hmanull Is APPlicable to SAFETY RELATED Equipmrnen Revfev~ed by:
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NOV cs 1985
FLORIDA POWER CORPORATION P.O. #PR3-2742 CYRSTAL RIVER PLANT UNIT #3 RED LEVEL, FLORIDA JOY MANUFACTURING COMPANY SERIES 2000 FANS MARK NO.
AHF-26A AHF-26B AHF-26C AHF-27A AHF-27B AHF-27C AHF-25A/
AHF-25B AHF-25C AHF-22A AHF-22B AHF-22C AHF-22D 62,500 62,500 62,500 66,000 66,000 66,000 50,000 43,750 43,750 31,800 31,800 31,800 31,800 DUTY CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
CFM @
.90"
.90"
.90" 1.1"1
- 1.
1" 1.1" Pt Pt Pt Pt Pt Pt Pt Pt Pt 1.53" 1.53" 1.53" 1.53" Pt Pt Pt Pt AHF-23A/
AHF-23B AHF-7A f
AHF-78 1
AHF-11B AHF-14A AHF-14B AHF-14C AHF-14D AHF-19A
(~z AHF-19B AHF-MAý,'
AIIF-38 AHF-40
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12,055 CFM @ 1.56" Pt 12,055 CFM @ 1.56" Pt 25,000 CFM @ 10" Pt 25,000 CFM @ 10" Pt 48,500 48,500 78,340 78,340 78,340 78,340 CFM @ 4.3" Pt CFM @ 4.3" Pt CFM CFM CFM CFM 11" Pt 11" Pt 11" Pt 11" Pt 42,355 CFM @ 2.0" Pt 42,355 CFM @ 2.0" Pt 45,000 CFM @ 2.73" Pt 45,000 CFM @ 2.73" Pt 62,000 CFM @ 3.2" Pt 62,000 CFM @ 3.2" Pt 25,000 CFM @ 4.7" Pt 25,000 CFM @ 4.7" Pt AHF-6A AHF-6B
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Index of Joy Fan, Serial Number to Plant Tag Number and Fan Blade Setting Series 2000 Fans Tag Number Model Number AHF-26A 60-26.5-870 AHF-26B 60-26.5-870 AHF-26C 60-26.5-870 AHF-27A 60-26.5-870 AHF-27B 60-26.5-870 AHF-27C 60-26.5-870 AIF-25A 54-26.5-870 AHF-25B 54-26.5-870 AHF-25C 54-26.5-870 AHF-22A 48-26.5-1170 AHF-22B 48-26.5-1170 AHF-22C 48-26.5-1170 AHF-22D 48-26.5-1170 AHF-23A 34-26.5-1170 AHF-23B 34-26.5-1170 AHF-7A 36-26.5-1770 AHF-7B 36-26.5-1770 AHF-11A 48-26.5-1770 AHF-1 1B 48-26.5-1770 AHF-14A 54-30-1770 AHF-14B 54-30-1770 AHF-14C 54-30-1770 AHF-14D 54-30-1770 AHF-19A 54-26.5-870 AHF-19B 54-26.5-870 AHF-3A 48-26.5-1170 AIF-3B 48-26.5-1170 AHF-4A 60-26.5-1170 AHF4B 60-26.5-1170 AHF-6A 38-26.5-1770 AHF-6B 38-26.5-1770 Blade Settin3s 3.5 3.5 3.5 3
33 3.5 4
4 4.5 4.5 1
1 5.5 5.5 3
3 3
3 2.5 2.5 NA NA NA NA NA NA Reference Factory Factory Factory Factory Factory Factory Factory Factory Factory WR 3506971REA 97-2281 WR 350697/REA 97-2281 REA 97-2281 REA 97-2281 Factory Factory Factory Factory Factory Factory WR 345308 WR 338716 WR 345309 WR 345456 WR 360843/NCR 42230 WR 360844/NCR 42230 Not Adjustable Not Adjustable Not Adjustable Not Adjustable Not Adjustable Not Adjustable
- AHF-22A/B/C/D fans set at blade angle of 5.5 degrees per REA 97-2281.
"REVISION" 13
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- ..44 JOY SERIES 2000 AXIVANI MODEL 36-26-1770