ML102920195
| ML102920195 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 11/24/2009 |
| From: | Lake L NRC/RGN-II |
| To: | Robert Carrion NRC/RGN-II |
| References | |
| FOIA/PA-2010-0116 | |
| Download: ML102920195 (7) | |
Text
a' e.--.qw Lake, Louis From:
Lake, Louis Sent:
Tuesday, November 24, 2009 9:24 AM To:
Carrion, Robert
Subject:
FW: Refute 8.5 for Review Attachments:
FM 8.5.ppt; Vacuum Calculation.doc; Item 108 - Purge Fan Event.pdf
/
/
From: Williams, Charles R. [1]
Sent: Tuesday, November 24, 2009 7:19 AM To: Lake, Louis; Thomas, George; nausdj@ornl.gov
Subject:
Refute 8.5 for Review 1
P/ý-03
8.5 Containment depressurization due to inadequate purging operation May identify additional perspective on this issue as RCA related efforts proceeds
==
Description:==
It was reported by a former CR3 operator (Dave Jones) 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.
Data to be Collected and Analyzed: Review event data, equipment information, and conduct personnel interviews if possible.
- 1. Dave Jones (former CR3 operator) interview documented November 10, 2009 placed the event to the late 1980s to early 1990's. (Exhibit 1)
- 2. No NCR to document the event has been found. CR3 self-evaluation unit has exhausted all databases in their document search. Estimate maximum vacuum achievable with purge fan operation. (Exhibit 1, pg 1)
- 3. Purge fan vender manuals: VTMA 231 (Exhibit 2, pgs 2-5)
- 4. Make/model of the purge fan: Joy Manufacturing Model 36-26.5-1770 axial vane fan. (Exhibit 1, pgs 2-5)
- 5. Review containment design bases, FSAR Section 5. (Exhibit 3)
Verified Refuting Evidence: A calculation of a Verified Supporting Evidence:
postulated worse-case vacuum generated by the purge fan demonstrated that a vacuum of 1 psi is less than the design bases for containment.
Reviewed by Dr. Patrick Berbon, 352-795-6486 ext.
1030 - PIH CR3 Team Office 11/23/2009 not r;e-'
w.thot 1
THE DRAWINGS CONTAINED IN THIS MANUAL MAY -%C"; BE STREVISIO.
CHECK THE FPC DRAWING SYSTMTDERME IF A LATER REVISION EXISTS.
FLORIDA POWER CORPORATION CRYSTAL RIVER PLANT UNIT #3 a.
RED LEVEL, FLORIDA ATTENTION:
MR. C. JACKSON FLORIDA POWER CORPORATION NUCLEAR ENGINEERING DEPARTMENT CRVSTAL RIVER - UNIT 3 INSTRUCTION MANUAL NO.
REI/MAR No.
P.O. No.
P_
_.q2 Equip. Tag No.
MUL nTA&
A20S5 This Instruction Manual is Applicable to SAFETY RELATED Equipment.
Reviewed by:
f T.
317 J;a I
NOV G8I985
- Reviewer, 1
Supervisor
F/Lt~
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-25AK' 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 @
.90" Pt
.90" Pt
.90" Pt 1.1" Pt 1.1" Pt 1.1" Pt 1.1" Pt 1.1" Pt 1.1" Pt 1.53" Pt
- 1.
53" Pt 1.53" Pt 1.53" Pt AHF-23A 1 AHF-23B_
A14F-7AJ AHF-11A (F
AHF-11B ~
AHF-14A AHF-14Ce AHF-19B.I AHF-3A~
AHF-4A(
/H-4.
AHF-6A AHF-68 12,055 CFM @ 1.56" Pt 12,055 CFM @ 1.56" Pt 48,500 CFM @ 4.3" Pt 48,500 CR4 @ 4.3" Pt 78,340 78,340 78,340 78,340 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 CFR @ 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 t
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0 Index of Joy Fan, Serial Number to Plant Tag Number and Fan Blade Setting Series 2000 Fans Tag Number AHF-26A ABF-26B AHF-26C A-F-27A AHF-27B AHF-27C AHF-25A AHF-25B AHF-25C AHF-22A AHF-22B AHF-22C AHF-22D AHF-23A AHF-23B AHF-7A' AHF-11B AHF-14A AHF-14B AHF-14C AHF-14D AHF-19A AHF-19B AHF-3A AHF-3B AIIF-4A AHF-4B AHF-6A AHF-6B Model Number 60-26.5-870 60-26.5-870 60-26.5-870 60-26.5-870 60-26.5-870 60-26.5-870 54-26.5-870 54-26.5-870 54-26.5-870 48-26.5-1170 48-26.5-1170 48-26.5-1170 48-26.5-1170 34-26.5-1170 34-26.5-1170 36-26.5-1770) 36-2,6.5A770I; 48-26.5-1770 48-26.5-1770 54-30-1770 54-30-1770 54-30-1770 54-30-1770 54-26.5-870 54-26.5-870 48-26.5-1170 48-26.5-1170 60-26.5-1170 60-26.5-1170 38-26.5-1770 38-26.5-1770 Blade Settings 3.5 3.5 3.5 3
3 3
3.5 4
4 4.5 4.5 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 350697/REA 97-2281 WR 350697/REA 97-2281 REA 97-2281 REA 97-2281 Factory Factory Factory Factoryi 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
FM10V 1 4 1 8 i
2 2
Z6I30 4
39 42 46 50 54 o
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VILOCnY-FflI IN UWIOREDS COtROV 8 12 16 2p 24 28 32 36-4 I
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JY SES 2000 AXIVAN,- FAN c-5102 MODEL 36-26-1770
4 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 would have 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