GO2-06-105, Response to Request for Additional Information Related to Alternative Source Term License Amendment Request

Response to Request for Additional Information Related to Alternative Source Term License Amendment Request

ML062260219
Person / Time
Site:	Columbia
Issue date:	08/07/2006
From:	Oxenford W Energy Northwest
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GO2-06-105 ENWC-001-PR-01, Rev 0
Download: ML062260219 (65)

Text

ENERGY NORTHWEST People. Vision- Solutions P.O. Box 968 e Richland, WA 9 99352-0968 August 7, 2006 G02-06-105 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001

Subject:

COLUMBIA GENERATING STATION, DOCKET NO. 50-397 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST

References:

1) Letter dated July 11, 2006 from B Benney (NRC) to JV Parrish (Energy Northwest), "Request for Additional Information (TAC No. MC4570)"

2) Letter dated September 30, 2004, DK Atkinson (Energy Northwest) to NRC, "License Amendment Request - Alternative Source Term"

Dear Sir or Madam:

Transmitted herewith in the attachment is the Energy Northwest response to the subject Request for Additional Information (Reference 1). This response provides additional justification for the Energy Northwest Alternative Source Term (AST) License Amendment Request (LAR) (Reference 2).

There are no new commitments being made. Ifyou have any questions or require additional information, please contact Greg Cullen at (509) 377-6105.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the date of this letter.

Respectfully, WS Oxenford Vice President, Technical Services Mail Drop PE08

Attachment:

Response to Request for Additional Information

Enclosure:

Excerpts from Methodology for Flow Correlations cc: BS Mallett - NRC RIV RN Sherman - BPAI1 399 BJ Benney - NRC NRR WA Horin - Winston & Strawn NRC Senior Resident Inspector/988C ADD(

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST Attachment Page 1 of 5 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION Proposed Changes Technical Specification (TS) 3.6.4.1, "Secondary Containment"

1. Revised SR 3.6.4.1.1 to change the minimum required containment vacuum from greater than or equal to 0.25 inch of vacuum water gauge to greater than 0.0 inch of vacuum water gauge.

2. Deleted SR 3.6.4.1.4.

3. Revised the existing SR 3.6.4.1.5 to change the maximum allowed standby gas treatment (SGT) subsystem flow rate from less than or equal to 2240 cubic feet per minute (cfm) to a secondary containment inleakage flow rate of less than or equal to 2430 cfm.

4. Due to the deletion of SR 3.6.4.1.4, SR 3.6.4.1.5 is renumbered as SR 3.6.4.1.4.

TS 3.6.4.3, "Standby Gas Treatment System"

5. Revised SR 3.6.4.3.3 to add the phrase 'and reaches greater than or equal to 4800 cfm within 2 minutes."

Item 1 The current TS require the secondary containment to be maintained at negative 0.25 inches wg during normal operation. The daily surveillance on this requirement assures that the building integrity is being monitored and maintained during the 24 month interval between draw down testing. Ifthe TSs were changed to allow less than or equal to 0.0 wg pressure normally (change No. 1 above) the building would potentially breathe as external pressures changed and integrity could degrade and be undetected. What assurance would this test or any other test provide that secondary containment integrity capability is being maintained?

Also, with the secondary containment being maintained at a negative pressure, the release to the environment is from a single point that is monitored for release. Ifthe secondary containment is allowed to breathe with external pressure changes, how would Columbia meet General Design Criteria (GDC) 64 or its equivalent for monitoring releases?

Response

Maintaining the building at greater than 0.0 inch vacuum water gauge (wg) vs. greater than or equal to 0.25 inch vacuum wg will provide a comparable capability for monitoring building integrity during the 24 month cycle. (As a point of clarification, the Energy Northwest LAR proposed that the value for secondary containment pressure be changed to greater than 0.0 inches of vacuum as opposed to greater than "or equal to" 0.0 inches of vacuum.)

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST Attachment Page 2 of 5 Secondary containment integrity is ensured by a combination of TS requirements (i.e., LCO 3.6.4.1, SRs 3.6.4.1.1, 3.6.4.1.2, 3.6.4.1.3, 3.6.4.1.5, and LCO 3.6.4.2, SRs 3.6.4.2.1, 3.6.4.2.2, 3.6.4.2.3) and programmatic controls.

The SR acceptance criterion for secondary containment pressure of greater than 0.0 inches of vacuum must be met at all locations within the building which, therefore, prevents the building from breathing during applicable modes. To achieve this condition, the less limiting building locations will be more negative relative to the outside conditions. In addition, instrumentation setpoints are established with consideration to uncertainty and drift to ensure the 0.0 inch wg is not reached or exceeded during normal operations. It is important to note that maintaining the 0.25 inch vacuum wg with the non-safety related reactor building ventilation system during non-accident conditions is not necessarily indicative of an operable secondary containment. This is due to the capacity of the reactor building ventilation system exhaust (approximately 75,000-100,000 cfm) which may potentially mask a small leak. Therefore, monitoring for greater than or equal to 0.25 inch wg vacuum versus greater than 0.0 inch wg vacuum does not enhance the effectiveness of this surveillance. Programmatic controls are necessary to provide additional assurance of integrity.

The programmatic controls utilized at Columbia include:

" Configuration control in permanent/temporary plant design change processes, work management processes, and a barrier impairment permit program

• Monitoring for potential deficiencies via daily plant walk downs by Operations/Security, and performance monitoring/trending of the secondary containment by the System Engineer These requirements and controls are comparable to those established for other passive barriers such as the Primary Containment, Drywell, and Control Room to ensure the integrity of these barriers.

Regarding GDC 64 requirements, the reactor building exhaust ventilation will continue to maintain a negative pressure in the secondary containment and therefore, remain the major release path that is monitored.

To provide assurance that all surfaces of secondary containment remain negative with respect to the outside atmosphere during normal operation, the reactor building pressure control system is operated at that pressure setpoint value that has been adjusted for the effect of extreme inside and outside temperature variations and instrumentation uncertainties and drift.

Additionally, the effect of wind is accounted for by the use of eight differential pressure transmitters, four in each division, which measure the differential pressure across the four external sides of the reactor building. The signal which indicates the least differential pressure is the signal used to control the exhaust flow rate from secondary containment, via modulation of the blade pitch on the associated reactor building exhaust fan. Therefore, revising the SR 3.6.4.1.1 value from greater than or equal to 0.25 in wg vacuum to greater than 0.0 in wg vacuum will not create new release paths and will ensure Columbia's continuing capability to monitor releases in accordance with GDC 64.

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST Attachment Page 3 of 5 Item 2 Deleting SR 3.6.4.1.4 (change No. 2) deletes the requirement to measure the time it takes to achieve a secondary containment negative pressure of negative 0.25 inches wg. Section 50.36 of Title 10 of the Code of FederalRegulations (10 CFR), Criterion 2, requires a limiting condition for operation (LCO) for a process variable, design feature, or operating restriction that is an initial condition of a design-basis accident. The time at which secondary containment is established is directly input into the loss-of-coolant accident design-basis analysis as the point at which secondary containment and the SGT can be credited. The LCO is relieved by meeting the SR that measures the time at which draw down is achieved as stated in the TS. Please clarify how the requirements of 10 CFR 50.36 are satisfied with respect to removing this SR.

Response

As explained on page 9 of the September 30, 2004 LAR, the 50.36 criteria are adequately satisfied by the combination of existing SRs 3.6.4.1.5 and proposed revision to 3.6.4.3.3.

The draw down analysis assumes the building has leakage characteristics that allow inleakage at a rate of 2430 cfm at 0.25 inches wg vacuum. Given these conditions, the building leakage hydraulics (characteristics) are established. The proposed surveillance testing methodology is designed to evaluate whether the as-tested leakage characteristics of the building are within that assumed by the analysis. This approach accounts for weather conditions when assessing the buildings leakage characteristics. Simply evaluating the time to reach 0.25 inches wg vacuum does not account for adverse or favorable weather conditions that may mask a change in the building leakage characteristics. Furthermore, it does not consider accident heat loads and their impact on the drawdown time. The testing required by the referenced combinations of SRs will ensure the building leakage characteristics are within those assumed in the analysis.

Measuring the building leakage as well as the fan start time and performance provides an adequate means to periodically verify that secondary containment required vacuum conditions can be achieved and maintained. This periodic testing improves Energy Northwest's knowledge of the overall secondary containment system characteristics.

Item 3 SR 3.6.4.1.5 verifies the SGT ability to maintain the negative 0.25 inch wg pressure in the secondary containment for a period of 1 hr. The change increases the flow rate from a maximum of 2240 cfm to a maximum of 2430 cfm, and labels this flow as an "inleakage" flow.

Please clarify how inleakage flow is measured or provide a basis for labeling it inleakage flow in lieu of the measured quantity which appears to be SGT subsystem flow. Please clarify ifthe reason to increase this maximum flow results from greater secondary containment inleakage and identify any steps being taken to control the degradation of secondary containment integrity.

Response

The inleakage flow value of 2430 cfm at 0.25 inches of wg vacuum is used to establish the building's leakage characteristics. Specifically, with 0.25 inches of wg vacuum applied to all surfaces of the building the leakage rate into the building will not exceed one air volume per day. This air change rate is prescribed by SRP 6.2.3. The higher inleakage rate is a revision to the originally specified rate of 2240 cfm, and results from the development of more accurate

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST Attachment Page 4 of 5 representation of the secondary containment free air volume. This request for a higher inleakage rate is not the result of a degrading secondary containment boundary. The flow rate that corresponds to that air change rate is 2430 cfm.

The inleakage flow rate is measured indirectly using SGT system flow rate as well as weather and building conditions. This information is correlated to an equivalent inleakage to the building given conditions where all surfaces of the building are exposed to a 0.25 inch wg vacuum. The bounding building leakage characteristics used in the analysis correspond to those that would allow an inleakage value of 2430 cfm if a 0.25 inch wg vacuum were applied evenly across all surfaces of the building. The surveillance test procedure is used to demonstrate equivalence between the buildings actual leakage conditions during the test and the criteria of 2430 cfm with 0.25 inch wg vacuum on all surfaces.

Excerpts from the relevant sections of the Columbia Station methodology used for correlating the measured SGT system's exhaust flow to inleakage flow is provided in the attached enclosure.

Item 4 No question on change No. 4. It is editorial.

Response

No response required.

Item 5 SR 3.6.4.3.3 verifies the ability of each subsystem to start. The proposed additional requirement of achieving 4800 cfm in 2 minutes is more restrictive and conservative. The NRC staff is concerned that Columbia is trying to relate the initial subsystem flow rate (4800 cfm in 2 minutes) to the time it takes to achieve draw down of the secondary containment to the negative 0.25 inches wg. Subsystem flow rate is not related to secondary containment integrity except in the sense that if there was more inleakage such as a door being open there would be less pressure drop on the subsystem and a corresponding increase in flow. Please clarify if Columbia is requesting that a SR on SGT subsystem flow combined with a Gothic analysis be substituted for measuring the draw down time directly and explain how this would identify changes in building leakage and other parameters used in the analysis over the time interval between tests (24 months).

Response

The time to draw down secondary containment for design basis accident conditions cannot be measured directly. The time to draw down the secondary containment to the required differential pressure of 0.25 inches vacuum wg on all surfaces is a function of SGT fan flow rate and secondary containment inleakage, in addition to other influences such as outside meteorological conditions, building heat loads, building inside temperature and humidity and service water temperatures. The 4800 cfm in 2 minutes does not represent the time required to draw down the secondary containment to the 0.25 inches vacuum wg. The test simply confirms

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST Attachment Page 5 of 5 the capacity of the SGT system assumed in the analysis. The draw down time is established analytically using assumed building leakage characteristics as well as the SGT timing and capacity evaluated by this SR. Confirming the SGT capacity and the buildings leakage characteristics (Refer to response to items 2 and 3) ensures that the analysis draw down time remains bounding.

The purpose of these tests is to validate the assumptions used in the analysis that provide input to establishing the off site release. Specifically, system capacity and building leakage characteristics are the parameters of interest. Since weather conditions have a direct impact on the time required to draw down the building, testing for a specific time requirement during non-accident conditions is not appropriate and does not provide an accurate representation of secondary containment integrity. Ensuring availability of minimum required SGT system capacity and building leakage characteristics are the appropriate parameters to validate with the TS SR.

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION RELATED TO ALTERNATIVE SOURCE TERM LICENSE AMENDMENT REQUEST Enclosure Excerpts from Methodology for Flow Correlations Project Report For Columbia Station Drawdown Procedure Evaluation Method ENWC-001-PR-01, Revision 0 Main Body Pages 1-29 of 29 Appendix 1 Pages 1-2 of 9 Appendix 2 Pages 1-2 of 30 Appendix 3 Pages 1-9, 137-143, 165-167, and 171-174 of 174 Appendix 4 Pages 1-2 of 2

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PAGE NO. 1 of 29 PROJECT REPORT For COLUMBIA STATION DRAWDOWN PROCEDURE EVALUATION METHOD Independent Review Required:

Prepared by: Paul N Hansen 9 Ys,4aate: September 26,2005 Reviewed by: NA Date:

Reviewer Reviewed by: Steve Ku XI*C yI )U"(Date: September 27, 2005

.IndependentReviewer f

Approved by: Don Shivas -" Date: September 27, 2005 Project Manager or #esignee

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PAGE NO. 2 of 29 PROTECT REPORT REVISION ~TATTN PRn11EC REPORT REVISION STATUS REVISION DATE DESCRIPTION 0 September 27, 2005 Initial Release PAGE REVISION STATUS PAGE NO. REVISION PAGE NO. REVISION All 0 APPENDIX REVISION STATUS APPENDIX NO. PAGE NO. REVISION NO. APPENDIX NO. PAGE NO. REVISION NO All All 0

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I_ _ PAGE NO. 3 of 29 Table of Contents Background ............................................................................................................................................ 4 Purpose ................................................................................................................................................... 4 References .............................................................................................................................................. 4 Assumptions ........................................................................................................................................... 5 Procedure Development Assum ptions ............................................................................................ 5 Timing Analysis Assumptions ........................................................................................................ 6 M ethodology .......................................................................................................................................... 8 Analysis - Development of Procedural Guidance M ethod ................................................................. 9 Analysis Model Inleakage ......................................................................................................... 9 W ind Pressure Coefficients ...................................................................................................... 12 W ind Pressure Tables (Tables A and C) ................................................................................... 13 Static Pressure Change Tables (Table B) ................................................................................ 13 M odel Leakage Flow Tables (Table D) ........................................................................................ 15.

Annubar Temperature Flow Correction Multiplier Table (Table E) ....................................... 15 Excess Leakage Capacity Evaluation Table (Table F) ............................................................ 16 Analysis - Development of Drawdown Timing Assessment ......................................................... 18 Case Descriptions ............................................................................................................................. 18 Initial Conditions .............................................................................................................................. 19 Boundary Conditions ........................................................................................................................ 20 Control Variables .............................................................................................................................. 21 Heater Inputs .................................................................................................................................... 27 Prim ary Containm ent Heat Sources .............................................................................................. 28 Analysis Results ................................................................................................................................... 28 Conclusions .......................................................................................................................................... 29 Appendices ........................................................................................................................................... 29 Appendix 1 Wind Pressure Coefficient Development (9 pages)

Appendix 2 GOTHIC Input Deck (30 pages)

Appendix 3 Procedural Steps and Supporting Tables (174 pages)

Appendix 4 SGTS Flow Recorder Correction Factor (2 pages)

Appendix 5 Design Verification (3 pages)

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PAGE NO. 4 of 29

Background

Technical Specification 3.6.4.1 and 3.6.4.3 are the governing Technical Specifications for secondary containment and Standby Gas Treatment System (SGTS) respectively. Secondary containment in-leakage is periodically measured to ensure that it complies with Technical Specification requirements specified in SR 3.6.4.1.4. Surveillance TSP-RB-B501 (Reference 1) is performed to demonstrate compliance with the Technical Specification. In addition, the results of the surveillance are used to evaluate the leakage hole size margin available as documented in TM-2077 (Reference 2).

The analysis used to demonstrate the time to restore the secondary containment building pressure to technical specification levels following a loss of coolant accident; Calculation NE-02-01-05 (Reference 3) was recently updated and submitted to the NRC for review. This analysis provides part of the technical basis used to support the use of Alternate Source Term (AST) methodology at the Columbia Station.

Energy Northwest has requested that the surveillance procedure be modified to provide a means of demonstrating that the Reference 3 analysis building leakage and SGTSperformance assumptions are maintained as demonstrated by the procedure.

This new surveillance will demonstrate that secondary containment integrity and Standby Gas Treatment perform as assumed in the AST draw down model. Since the Reference 3 model conservatively assumes the in-leakage is maximum (one building volume per day = 2430 ACFM) the surveillance will be based on that same value. Once the AST submittal is approved by the NRC, this new surveillance will be used to demonstrate compliance.

Purpose The purpose of this report is to present the approach to be used as part of the secondary containment surveillance procedure to assess if the surveillance procedure results are acceptable. The method will convert the surveillance leakage rate results into a form that is comparable with the Reference 3 assumptions. This allows for a direct comparison of the surveillance results with the analysis predicted leakage. Specifically, the method demonstrates the test results for the secondary containment building and SGTS conditions are bounded by the assumptions used by the accident analysis documented in Reference 3.

Also presented in this report, are additional analysis results that provide insight into the drawdown time expected under surveillance conditions. These latter results are presented for information only and do not and can not exactly predict the drawdown times expected during a surveillance, but rather present a range for use in evaluating the overall health of the SGTS.

References

1. TSP-RB-B501 SURVEILLANCE - PROCEDURES CONTAINMENT SYSTEMS - REACTOR BUILDING (SECONDARY CONTAINMENT) DRAWDOWN/LEAKAGE FUNCTIONAL TEST

2. TM-2077 Revision 2 "SGT EXCESS CAPACITY"

3. NE-02-01-05 Revision I Appendix D and E "Secondary Containment Drawdown"

4. NE-02-92-06 Revision 0 "SGT Annubar Flow Meter Correction Factors" (Relevant pages provided in Appendix 4)

5. ME-02-99-20 Revision 0 "Calculation for SGT Filter Unit Carbon Bed Face Velocity"

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PAGE NO. 5 of 29 Assumptions Two sets of assumptions are provided below. The first will be associated with the procedure methodology used to compare the surveillance results with the analytical model. The second set of assumptions are associated with changes to the GOTHIC drawdown model used to evaluate the drawdown times expected for a range of conditions. These latter results are presented for information only and do not and can not exactly predict the drawdown times expected during a surveillance, but rather present a range for use in evaluating the overall health of the SGTS.

Procedure Development Assumptions

1. Wind friom the South is assumed to correspond to an angle of 1800. This value is selected to be consistent with the Meteorological data.

2. Meteorological tower information is assumed to be taken from 24511 This value is selected as opposed to the 33ft tower height. The selection is purely arbitrary, but is identified to clearly indicate to the user that the wind speed adjustments are made based on the higher of the tower elevations. Therefore, the Meteorological data from this height must be used with the procedure.

A separate set of tables will need to be developed if the 33ft height is to be used instead of the 245ft.

3. The Annubar Temperature Flow Correction Table is based on the maximum set of multipliers available. The use of the maximum values will ensure that the minimum difference exists between the calculated leakage value and the converted indicated SGTS flow. This produces a conservative leakage margin used to establish the secondary containment boundary area available for leakage as part of this effort.

4. When developing the wind pressure tables wind speeds up to 40 mph are used. This value exceeds that assumed in the drawdown analysis (17.2 mph). Wind speeds in excess of 17.2 mph are occasionally experienced at the site. Therefore, to accommodate the possible situation where wind speeds exceed 17.2 mph during a surveillance test the table is extended to 40 mph.

5. The railroad door in-leakage tables are assumed to be applicable for the conditions were the railroad bay doors are open as well as closed. Given that the railroad bay door is a small fraction of the overall wall dimension (approximately 1% of the total area) of the Reactor Building, the wind pressure coefficients are reasonably represented by those established with the door in the closed position. In other words, it is assumed that the opening of the Railroad bay door will not alter the overall flow pattern around the building. Therefore, the pressure conditions developed as the result of wind flowing past the Reactor Building will impose either a suction or pressurizing condition on the open door area as predicted by these coefficients originally developed for the door closed position.

For a steady air flow condition the pressure difference between the Railroad Bay Area and the outside will be nearly zero. Once a steady state condition is reached for a given wind speed and direction the only steady flow through the open door will be the leakage into the building via this path. If it is assumed that the flow of the SGTS enters the building via the open railroad door a pressure drop can be estimated between the outside and the bay area through the open railroad door. Using the 70%/30% flow split between the roof and the railroad bay door assumed in the accident analysis a pressure drop of approximately 0.0013 inch of water is to be expected with 6720 acfin SGTS flow under steady conditions. This SGTS flow rate is selected to conservatively represent the SGTS flow rate. Lower flow rates would produce smaller pressure drops.

For the wind directions where suction conditions are developed (north, north west, south, south west, and west) building in-leakage is achieved only when the building pressure at the hatch

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PAGE NO. 6 of 29 location is more negative then that resulting from the wind itself. Therefore, the railroad bay area pressure will need lo fall below that produced by the wind on the outer surface of the building. To establish the necessary flow this area will need to exhibit a pressure drop of up to 0.0013 inch of water below the already negative exterior pressure. For the wind directions where a pressurization condition is developed (north east, south east and east), building in-leakage is achieved following an additional pressure drop of up to 0.0013 inch of water. In either case, the direct use of the wind tables developed for conditions when the railroad bay door is closed is conservative. The degree of the conservatism is not viewed to be overly conservative and it is appropriate that the same set of tables be applied for each condition.

Timing Analysis Assumptions

1. The leakage characteristics of the building are the same as that assumed in the Reference 3 analysis. This will result in a bounding response time since the building envelope is expected to be much tighter than is assumed in the Reference 3 analysis.

2. The model will allow leakage out of the building if pressure conditions allow for this to occur.

The Reference 3 model conservatively ignores leakage out of the building. Since this analysis is provided to estimate a more realistic building response, that conservatism is removed.

3. The maximum assumed wind speed will be 17.2 mph and the minimum wind speed will be 0.0 mph. The maximum value corresponds to the upper wind speed assumed in the Reference 3 analysis and is appropriately bounding in this effort as well. The minimum wind speed of 0.0 mph is the unquestionable minimum value.

4. The maximum assumed outside air temperature will be 86°F and the minimum outside air temperature will be 28"F. These values represent the range of values evaluated in Reference 3 and represent the appropriate limits for the purpose of this evaluation.

5. The building air temperature will be assumed to be 750 F. This value corresponds to that assumed in the Reference 3 analysis.

6. The minimum SGTS fan flow will be based on 4800 ACFM. This value corresponds to the value assumed in Reference 3, which was established to represent a minimum value for system flow.

Such an assumption produces a greater value for time to restore the building to 0.25" water gauge.

Therefore, this value is appropriate for this evaluation as well, establishing an upper limit on the time to restore the reactor building to the required pressure values.

7. The maximum SGTS fan flow will be 6720 ACFM. This value is based on the SGTS high flow limiter setpoint of 5378 ICFM (note that this is indicated flow), plus the uncertainty/drift of 434 ICFM, then convert this number to an ACFM value using the conversion tables for ICFM-to-ACFM from Reference 4. Note that this same analysis is documented in calculation ME-02-99-20 (Reference 5), which determines the maximum face velocity that would be experienced by an SGTS carbon bed. The results of this calculation show a final value of 6720 ACFM, so this is the value used. The entry conditions for this conversion assumed a post-accident inlet temperature into SGTS of 105F (ref calc NE-02-94-71) plus a 15F rise across the SGTS heaters, a humidity of 70%RIH and a barometric pressure of 14.35 psia.

8. The building initial conditions will be based on 0.0" wg pressure differential at the instrument and the timing will be based on the time required to produce 0.25" wg pressure differential at the same instrument. This is assumed to make the analysis consistent with the surveillance procedure documented in Reference 1. This is an appropriate assumption since the purpose of this analysis is to establish the range of times to reach 0.25" wg at the instrument that may be expected during the surveillance.

9. The building atmospheric heat loads will be based on the normal heat loads identified in Reference 3. Sensitivity values will be developed starting from these values.

10. The drywell and wetwell are assumed to be at 135°F and 950 F respectively. These values correspond to the initial values used in Reference 3 for these values. Since no accident is assumed in this analysis these values are simply maintained constant.

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11. Meteorological tower information is assumed to be taken from 33ft. Note that this value differs from that used in the procedure development. This value is selected to be consistent with the Drawdown analysis documented in Reference 3.

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I _ _ _ _ _ __ _ _ _ _ _ I _ _ _ _ __ _ _ _ _ __ _ _ _ _ PAGE NO. 8 of 29 Methodology The methodology used to develop the overall approach is documented in References 2 and 3. The method will use lookup tables to allow the user to apply the weather data at the time of the test along with the measured pressure differential for any of the instruments to determine the leakage that would be predicted by the analysis model under the same conditions as the surveillance test. The resulting leakage is compared with the measured data.

In support of this effort, additional wind pressure coefficients are developed for each of the instruments as well as the Railroad Door as a function of wind direction to augment those already documented in Reference 3. These values are established using the same approach as is outlined in Reference 3 (Appendix 1). The wind pressure coefficients are used to establish the wind-induced pressure values expected at the building leakage locations given the weather conditions during the test. In addition, static pressure adjustment tables are developed using methods documented in Reference 3. The combination of these wind-induced and static pressure tables are used to establish pressures at the building leakage location, based on the measured pressure difference and weather conditions at the time of the test.

Given the pressure differences calculated for the leakage locations, the user can determine the amount of leakage into the building based on the analytical model. A set of tables are developed as part of this report for this purpose. The total analytical leakage flow at the surveillance test conditions is established by adding the leakage flows determined at the leakage locations. If the total analytical leakage exceeds the flow rate measured as part of the test, the building leakage rate is bounded by the analysis assumptions.

The next step in the process is to determine the margin available to the Technical Specification limit. This is accomplished by taking a simple ratio of the measured leakage (ACFM) and the model's predicted leakage. The ratio represents the percent to the analysis limit established by the surveillance results. The Technical Specification leakage rate is then multiplied by the ratio to establish the building leakage at the Technical Specification pressure differential of 0.25 inwg. The difference between the Technical Specification value and the building leakage at this pressure represents the margin. This margin value is then used to establish an equivalent orifice size for use in evaluating as found and maintenance required changes to the secondary containment boundary. A table of values is provided based on the orifice relationship documented in Reference 2.

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COVER SHEET REV. 0 PAGE NO. 9 of 29 Analysis - Development of Procedural Guidance Method Analysis Model Inleakage

1. In order to determine if the measured leakage rate for the surveillance test is acceptable, the measured value is compared with what would be predicted by the analysis model. This is a multiple step process that uses lookup tables developed in this document. The procedure steps and necessary support documentation is provided in Appendix 3. The first step in the process to determine model leakage is to convert the surveillance test measured pressure into pressure values that are applied at the roof and railroad door locations for the surveillance test wind and temperature conditions. With these pressures established the model predicted leakage rates can be determined using lookup tables developed in this document.

2. The first step in establishing the pressures at the leakage locations is to determine the surveillance pressure instruments static pressure differential value. This is accomplished by subtracting the wind-induced pressure from the measured value. The wind-induced pressure for the instrument is obtained using lookup tables (Table A) that are a function of instrument location (Refer to Figure 1), wind speed, wind direction and outside temperature.

APstatic = APmeasured - fTableWindlnst(TempOutside,Wind,Location)

3. The next step is to take the instrument static pressure difference and make the necessary static pressure differential adjustments to establish static pressure differential values at the roof and railroad door leak locations. This is accomplished using lookup tables (Table B) developed later in this document. These tables are functions of inside and outside temperatures of the building.

APstaticRoof = APstatic + fI'ableStaticChangeRoof(TempInside, TempOutside)

APstaticDoor= APstatic+ jTableStaticChangeDoor(Templnside,TempOutside)

4. The third step is to establish the wind pressure values for the roof and railroad door. As with the other steps, these values are obtained using lookup tables (Table C) developed in this document.

These tables are functions of wind speed, wind direction and outside air temperature. These values are added to the respective static pressure differences established in the previous step.

These new total pressure differences are used with a lookup table to establish the analytical leakage for the roof and railroad door.

APRoof = APstaticRoof + lTableWindRoof (TempOutside,Wind)

APDoor = APstaticDoor+ ITableWindDoor(TempOutside,Wind)

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5. The leakage predicted by the model under the same conditions as experienced during the surveillance are obtained using lookup tables (Table D). These tables are a function of pressure differential and outside temperature. The leakage at the roof and the door are added together to give the total leakage. This total leakage value is compared with the SGTS measured flow from the test, which is corrected to be in units of ACFM (using Table E).

LeakageRoof = JTableLeakageRoof(APRoofTempOutside)

LeakageDoor= fTableLeakageDoor(APDoor,TempOutside)

TotalLeakage = LeakageRoof + LeakageDoor MeasuredFlow= SGTMeasured

• JTableACFM(TempAnnubar)

6. The Technical Specification Margin is evaluated based on the ratio of the Measured Flow and the Analytical Flow.

MeasuredFbw TechSpecMargin = 2430fin* (I (LeakageRoof + LeakageDoo))

7. The additional hole size in the wall of the Reactor Building that would consume the Technical Specification Margin is established using Lookup Tables (Table F) developed in this Report.

diameter= ]Table(Flow)

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PAGE NO. 11 of 29 Railroad Door This Side IA2 IB2

- 1A3 900(4500)

IBI -

4 - 1800(5400) 00(3600)

- 1B3 2700 Associated Degrees Measured by the Met Tower Instrumentation IA4 IB4 133' Figure 1 -Instrument Locations

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___ ______ ___ ___ ___ ___ PAGE NO. 12 of 29 Wind Pressure Coefficients Wind pressure coefficients are established for each of the instruments as a function of wind direction.

These values are used to correlate the measured differential pressure with pressures at the roof and railroad door. The instrument location wind pressure coefficients are determined using a graphical approach similar to what is documented in Reference 3. The evaluation of these inputs is presented in Appendix I of this document.

Table 1 - Pressure Instrument Wind Pressure Coefficients Measurement N NE E SE S SW W NW

'Location Wind Wind Wind Wind Wind Wind Wind Wind IA1 0.7 0.09 -0.52 -0.63 -0.35 -0.56 -0.95 0.62 1A.2 -0.6 0.15 0.8 0.59 -0.95 -0.57 -0.37 -0.63 IA3 -0.38 -0.56 -0.98 0.62 0.64 0.08 -0.5 -0.64 1A4 -0.98 -0.54 -0.38 -0.64 1-0.49 0.07 0.59 0.65 1B1 0.82 0.55 -0.92 -0.58 -0.35 -0.63 -0.68 0.19 1B2 -0.48 0.05 0.6 0.65 -0.98 -0.54 -0.38 -0.64 1B3 -0.37 -0.63 -0.55 0.28 0.79 0.61 -0.94 -0.56 1B4 -0.55 1-0.64 -0.36 -0.56 -0.96 0.62 0.69 10.09 Wind pressure coefficients are established for the railroad door as a function of wind direction. These values will be used to establish the wind pressure applied to the door as a function of wind direction and speed. The Railroad Door location wind pressure coefficients are determined using a graphical approach similar to what is documented in Reference 3. The evaluation of these inputs is presented in Appendix 1 of ths document.

Table 2 - Railroad Door Wind Pressure Coefficients Measurement jN NEIEISE IS SW W NW Location Wind Wind IWind IWind IWind Wind Wind Windi Railroad Door -0.51 0.025 10.42 10.55 -0.92 -0.40 -03 _0.47 Wind pressure coefficients for the roof level are documented in Reference 3. Since the wind pressure values are established to be an average of the four sides for the purpose of evaluating building leakage, symmetry is applied and only three values are required to evaluate the entire set of data. These values are obtained from Reference 3 using the wind angles of 90' (East and West), 1800 (North and South) and 2250.

The values are calculated using the relationship for averaging the roof elevation CpU outlined in Reference 3 (Appendix 1 page I11 of Calculation NE-02-01-05 Appendix E). The data used in this method are also found in Reference 3 (Appendix 3 page 8 of Calculation NE-02-01-05 Appendix E).

Table 3 - Roof Elevation Average Wind Pressure Coefficients Measurement NINE EISE S I W WINW Location Wind Wind Wind Wind WindiWind Wind IWind Roof Elevation -0.285 -0.161 -0.335 -0.161 -0.285 -0.161 -0.335 -0.161

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PAGE NO. 13 of 29 Wind Pressure Tables (Tables A and C)

To evaluate what the Analysis Model would predict for building leakage under the surveillance test conditions, the wind pressure at the instrument (ffableWindlnst), roof (frableWindRoof) and railroad door (fTableWindDoor) must be determined for the given wind speed, wind direction and outside temperature.

Using the relationships developed in Reference 3 a set of tables is developed for this purpose. The specific relationship used is as follows.

equation 1 (U,)2 27.71in Pw(V, Temp, Hmet, HBuild, Cp) = Cp* Pgas(Patm,Temp)* (in2 psi 2g (144- P 0.14 ~ 014 (HBuild 1

( 900" met=Hmet--g 90 Where Cp is the wind pressure coefficient selected from Tables 1 through 3.

Patm is defined to be 14.696psi as described in Reference 3 Temp is the outside air temperature (OF) p is the density of the air calculated based on air at Patm and Temp.

V is the wind speed measured at the meteorological tower (mph).

Hmet is the Met Tower Height assumed to be 245ft HBuild is the Building Height associated with either the Instrument, Roof or Railroad Door.

UH is the velocity (mph) at the building corrected to account for terrain and elevation.

Static Pressure Change Tables (Table B)

The static pressure change between the instrument elevation and the roof (fIableStaticChangeRoof) is simply calculated using the elevation changes and inside and outside density of the air. The following relationship is used to establish the roof level static pressure change.

equation 2 AP,4 ,,f = -g(ELRoof - ELInstrument)(p(Patm,TempOutside,"air") - p(Patm,Templnside,"air")) 27.7 lin 1l44 in2jPsi AProf = -g(667ft - 576.5ft)(p(Patm,TempOutside,"air")-7 p(Patm,Templnside,7airl))P144Pd 27.71in in)psi

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'PAGE NO. 14 of 29 Similarly, for the Railroad door (ffableStaticChangeDoor) elevation is calculated as follows.

APdoor = .-g(ELRailroad- ELInstrument)p(Patm,TempOutside,"air") - p(Patm,TempInsideair)) . 1in P(PtmT144nid " in 2)[ si 27 71in APdor. = -g(469ft - 576.5ftXp(Patm, TempOutside,"air") - p(Patm,Templnside, air')) ( "

where g = I The elevation values are based on Reference 3 values, and the atmosphere pressure is 14.696 psia. The tables are generated using temperature differences.

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I_ I PAGE NO. 15 of 29 Model Leakage Flow Tables (Table D)

Once the applied pressures are established for each of the leakage paths, a lookup table is used to determine the leakage flow in ACFM (Table D) at the roof (ifableLeakageRoof) and at the Railroad Door (ifableLeakageDoor). The basic equations used to establish these tables are provided in Reference 3.

These equations are provided below for completeness.

equation 3 LeakDoor = (416.57(APtor )+ 1249.7 lI(APoor). ) Pai, (14.696ps,75F)

Pair(14.696psi,TempOutside) equation 4 LeakRoof = (1344.5(APRof )+ 2729.75(AP.. ,05 Pair(14.696psi,75o F)

.. . .)Pair (14.696psi, TempOutside)

Annubar Temperature Flow Correction Multiplier Table (Table E)

The user of the procedure will need to convert the SGTS indicated flow into ACFM (ffableACFM). The table-provided below is based on the data used in Reference 3 to provide the conversion discussed in Appendix D of that reference (Reference 4). The correction multiplier applied in this table are based on 100% humidity and a pressure of 13.84 psia. The low pressure and high humidity have associated with them the highest multipliers. This set of values was selected to be consistent with that used in the drawdown analysis Reference 3 (Procedure Development Assumption 3).

Table 4 - Annubar Correction Multiplier Converting ICFM to ACFM T~emperature Correction Temiperature Correto Temperature C Co- cetion~

~~Fa tor 2 2 (O)Fzo (OF ~ Factr -j (')

50 1.0904 19 -111 16 1Kz

.2807j 55 1.'6 110 1.1696 165 1.2-973

~60 ~70 1O;~x Tt3~~

65 1.1082 120 1.1864 175 1.3356 75 1.1205 130 1.2053 185 1.3826 80 1-26 13 .15 9 140 85 1.1334 140 1.2268 195 1.4415 95 1.147 150 1.2516 160 .'15'42"~ 11 5 1.216-56

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PAGE NO. 16 of 29 Excess Leakage Capacity Evaluation Table (Table F)

The user will use the results of the previously calculated and measured flows to determine the excess flow available. This information will be converted to an equivalent orifice size using the model documented in Reference 2.

equation 5 2

OrificeFlow= bscS cj~h *Y* d *C* VAP* Pairg14.696psi,0OF)

= 24700*

lb / sec S9 OrificeFlow= volumetric flow (clai)

Y = compressibilty factor (1.0 for low pressure drop) d = diameter of hole (inches)

C = flow coefficient (1.0 for conservatism)

Sg= specific gravity with respect to air (1.0)

AP - pressure drop in psi (0.25"w.g. = 0.00902psi) p= density of air (0.086361bm/ft3 for air at 00 F)

Rearranging terms, the diameter is determined based on the excess flow (fTableFlow from Table F).

equation 6 d =( ExcessFlow * (60) *Sg 30.5 24700* Y

• C Ap7Pi

• 14.696psi,O0F),

where ExcessFlow = 243 1- MeasuredFlow(ACFM) 1

[ (LeakageRoof + LeakageDoor)J

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PAGE NO. 17 of 29 This relationship is used to develop the Lookup Table 5.

Table 5 - Excess Flow Orifice Lookup Table 125 3.30 8.54 975 9.21 66.65 175

• 150& J 3.90 3.61' 11.96 10.25~' 1025 0'1 7 bb-9j'83 9.45 70.07 225 4.43 15.38 1075 9.67 73.48 275 4.89 18&80' 11-25 9.90 76.90 325 5.32 22.22 1175 10.11 80.32 375 5.71 25.63 1225 10.33 83.74 425 6.08 29.05 1275 10.53 87.16 475 6.43 32.47 1325 10.74 90.57 50SOO 6&T 60fl6 >>34.1itT35 41 16A7W 92.28 525 6.76 35.89 1375 10.94 93.99 556:0 v> 37'3J'6Qv -'&W400ts-> '11,04-' J ~90 575 7.07 39.31 1425 11.14 97.41 60 .2 1. 15 11.14'9R' 625 7.38 42.72 1475 11.33 100.83 675 7.66 46.14 1525 11.52 104.24 725 7.94 49.56 1575 11.71 107.66

.7&08 V'$2 t+ýJ001 5 '8-l 775 8.21 52.98 1625 11.89 111.08 825 8.47 56.39 1675 12.07 114.50 875 8.73 59.81 1725 12.25 117.92 925 8.97 63.23 1775 12.43 121.33

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PAGE NO. 18 of 29 Analysis - Development of Drawdown Timing Assessment The Drawdown Timing Assessment is performed using the GOTHIC model developed in Reference

3. The purpose of running the model is to obtain an assessment of the range of time to reach 0.25 in wg at the instrument that would be expected during a surveillance. These values are by nature conservative based on the building leakage that is assumed in this analysis versus the actual building envelope conditions, which are expected to be demonstrated to be better than the analysis model.

The basic GOTHIC model and all of its inputs are documented ifi Reference 3. The information that follows represents the necessary changes to the inputs as specified in the Assumptions section to provide the evaluation of the surveillance timing.

Case Descriptions A number of cases are run to bound the range of times that are reasonable to expect for the assumed building leakage characteristics as well as the weather and SGTS performance assumptions. A total of 12 cases are run to establish a range of times that result from a variety of conditions. These cases are described in Table 6.

Table 6 - Case Descriptions Case Case Description' Number 1 6720ACFM SGTS Flow, No Wind, 860 F Outside Air Temperature, Minimum Internal Electrical Heat Loads.

2 6720ACFM SGTS Flow, No Wind, 280F Outside Air Temperature, Minimum Internal Electrical Heat Loads.

3 6720ACFM SGTS Flow, No Wind, 75°F Outside Air Temperature, Minimum Internal Electrical Heat Loads.

4 6720ACFM SGTS Flow, No Wind, 280 F Outside Air Temperature, Normal Internal Electrical Heat Loads including HPCS pump operation.

5 6720ACFM SGTS Flow, No Wind, 750 F Outside Air Temperature, Minimal Internal Electrical Heat Loads including HPCS pump operation.

6 4800ACFM SGTS Flow, 17.2mph SE Wind, 860 F Outside Air Temperature, Normal Internal Electrical Heat Loads including HPCS pump operation.

7 4800ACFM SGTS Flow, 17.2mph SE Wind, 280F Outside Air Temperature, Normal Internal Electrical Heat Loads including HPCS pump operation.

8 4800ACFM SGTS Flow, 17.2mph SE Wind, 750F Outside Air Temperature, Normal Internal Electrical Heat Loads including HPCS pump operation.

9 4800ACFM SGTS Flow, 17.2mph SE Wind, 280F Outside Air Temperature, Minimal Internal Electrical Heat Loads.

10 4800ACFM SGTS Flow, 17.2mph SE Wind, 280F Outside Air Temperature, Minimal Internal Electrical Heat Loads including -PCS pump operation.

11 4800ACFM SGTS Flow, 6mph SE Wind, 79.9°F Outside Air Temperature, Minimal Internal Electrical Heat Loads.

12 6720ACFM SGTS Flow, 17.2mph SE Wind, 86TF Outside Air Temperature, Normal Internal Electrical Heat Loads including HPCS pump operation.

1Wind Speed measured at 33 ft tower height per Timing Analysis Assumption 11

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PAGE NO. 19 of 29 Initial Conditions The GOTHIC model initial conditions are established using the same methods outlined in Reference 3 with the exception that the governing instrument provides the basis for the initial conditions as described previously. To establish the initial conditions for the volumes, the conditions at the measuring instrument (1A4) are specified to be 0.0 in wg. The inside pressure at the 576.5ft elevation are then defined to equal the total pressure on the outside face of the building at the location of the instrument for the conditions specified in Table 6. The inside pressure is then corrected to correspond to the center elevation of the corresponding volume.

APmeasured = O.Oin - Obtained at the 576.5 ft elevation Poutside used below represents the total pressure (static plus dynamic)

The function Pw is previously defined in Reference 3 and earlier in this document.

Pinside = Poutside = 14.696psi - poutside(gX576.5ft - 441ft)+ Pw(V,Temp,Hmet,HBuild, Cp)

PVolumelC = Pinside- pinside(g&XElVolumeCenter- 576.5ft)

The volumes of interest are defined in Reference 3 and have centers at the following elevations.

Volume 1 Center Elevation = 522.937ft Volume 2 Center Elevation = 577.75ft Volume 4 Center Elevation = 445.625ft Volume 5 Center Elevation = 636.018ft The initial pressures are summarized in Table 7.

Table 7 -Initial Conditions Case Volume I Volume 2 Volume 4 Volume 5 Internal Number (psia) (psia) (psia) (psia) Temperature All Volumes (OF) 1 14.65519 14.62694 14.69502 14.59692 75 2 14.64705 14.61881 14.68689 14.58878 75 3 14.65378 14.62553 14.69362 14.59551 75 4 14.64705 14.61881 14.68689 14.58878 75 5 14.65378 14.62553 14.69362 14.59551 75 6 14.65037 14.62212 14.6902 14.5921 75 7 14.64166 14.61341 14.68149 14.58339 75 8 14.64886 14.62061 14.6887 14.59059 75 9 14.64166 14.61341 14.68149 14.58339 75 10 14.64166 14.61341 14.68149 14.58339 75 11 14.65382 14.62558 14.69366 14.5955 75 12 14.65037 14.62212 14.6902 14.5921 75

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PAGE NO. 20 of 29 Boundary Conditions The boundary conditions within the model that are associated with building leakage as well as SGTS discharge are defined in Reference 3. The methods used to determine their initial conditions are established in that same document. The method simply establishes the total pressure at the building surface in question using the pressure relationships defined previously and wind pressure coefficients assigned to the corresponding surfaces. The wind pressure coefficients are assigned based on wind direction, as defined in Table 2 and 3. The elevations used in establishing these conditions are based on those documented in Reference 3.

Elevation Railroad Door = 469ft Elevation Roof= 667fl Table 8 - Boundary Conditions Case Roof Elevation Railroad Door Elevated z Outside Number Leakage (psia) Elevation Leakage Release (psia) Temperature (psia) (OF) 1 14.58189 14.68186 14.58189 86 2 14.56832 14.68018 14.56832 28 3 14.57954 14.68157 14.57954 75 4 14.56832 14.68018 14.56832 28 5 14.57954 14.68157 14.57954 75 6 14.58052 14.68425 14.58189 86 7 14.56678 14.68285 14.56832 28 8 14.57814 14.68401 14.57954 75 9 14.56678 14.68285 14.56832 28 10 14.56678 14.68285 14.56832 28 11 14.58043 14.682 14.5806 79.9 12 14.58052 14.68425 14.58189 86 2 Per Reference 3 this value is calculated to correspond to the Roof elevation with no wind. It conservatively ignores any elevation difference between the opening and the roof elevation.

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I , PAGE NO. 21 of 29 Control Variables The model uses control variables to establish the leakage into the building as a function of pressure difference across the leakage locations. To accommodate leakage out of the building (Timing Analysis Assumption 2) the logic was modified. Additional logic was added to the control variables to convert the potentially negative pressure difference across the surface (associated with leakage out of the building) to a positive value. This first step is required to ensure that the square root term will accept the differential pressure as defined in Equations 3 and 4 (i.e., avoid attempts to calculate the square root of a negative number). The logic is further modified to then assign a negative value to the flow if the pressure value was determined to be negative in the previous step. The control variable logic changes can be seen by comparing Reference 3 control variable inputs with those documented in Tables 11 and 12. Specifically, Control Variables 11 through 19 represent the newly defined logic. Case-specific input values for the leakage flow control variables are documented in Tables 9 and 10.

The values provided in Table 9 are the case-specific values used for the pressure related control variables.

The determination of these values is unchanged from that documented in Reference 3. The cv6 initial condition is simply the calculation of the pressure at the top of the Railroad Door based on the initial pressure in the control volume 1.

Control Variable 6 is used to calculate the inside pressure at the railroad door leakage elevation (469ft).

The initial value is calculated based on the initial pressure in volume 1. The control variable 7 represents the calculated pressure at the railroad door used for leakage calculations. The initial condition is simply the initial difference between the pressure calculated for control variable 6 and the boundary condition pressure applied at the door. The aO coefficient associated with this control variable is set to equal the boundary condition pressure at the Railroad Door. Therefore, this value corresponds with Table 8 values for the railroad door outside pressure. Control Variables 8 and 9 are similarly calculated for the Roof Elevation (667ft) leakage location. Control Variable 10 is the average pressure applied at the roof elevation using wind coefficients documented in Table 3. The basic relationships used in this effort are defined below.

The control variable 15 is basically a reproduction of control variable 7 and therefore, uses the same coefficient input value.

AP = Pinside- Poutside Pinside = PVolume#-pinside(ELlnside- ELVolume#)g

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PAGE NO. 22 of 29 Table 9 -Leakage Pressure Conditions Control Variable Inputs Case cv6 Initial cv7 Initial cv7 aO cv8 Initial cv9 Initial cv9 aO cvl0 aO cv15 aO Number Condition Condition Coefficient Condition Condition Coefficient Coefficient Coefficient Door Door Diff. Door Diff. Roof Roof Min. Roof Min. Roof Leak Door Diff.

Inner Press. Press. Level Diff. Diff. Press. Diff. Press Press.

Press. Inner Press.

Press.

1 14.68298 -0.03094 14.68186 14.58095 0.026 14.58189 14.58189 14.68186 2 14.67484 0.14793 14.68018 14.57282 -0.125 14.56832 14.56832 14.68018 3 14.68157 0 14.68157 14.57954 0 14.57954 14.57954 14.68157 4 14.67484 0.14793 14.68018 14.57282 -0.125 14.56832 14.56832 14.68018 5 14.68157 0 14.68157 14.57954 0 14.57954 14.57954 14.68157 6 14.67816 0.1687 14.68425 14.57613 0.026893 14.5771 14.58052 14.68425 7 14.66945 0.37132 14.68285 14.56742 -0.1236 14.56296 14.56678 14.68285 8 14.67665 0.20375 14.68401 14.57463 0.000861 14.57466 14.57814 14.68401 9 14.66945 0.37132 14.68285 14.56742 -0.1236 14.56296 14.56678 14.68285 10 14.66945 0.37132 14.68285 14.56742 -0.1236 14.56296 14.56678 14.68285 11 14.68161 0.01063 14.682 14.57959 0.012 14.58001 14.58043 14.682 12 14.67816 0.1687 14.68425 14.57613 0.026893 14.5771 14.58052 14.68425

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PAGE NO. 23 of 29 The values provided in Table 10 are the case-specific corrected coefficients defined in Equations 3 and 4.

evl8 = (416.57) Pair(14"696psi,750F)

Pair(14.696psi,TempOutside)

CV19 = (1249.71) pair_(14.696psi,750F)

... \Pair(la.696psi,750F) fi Pair(14.696psi,TempOutside) cvl93 = (1344.5) , --

Pair(14.696psi,TempOutside) cvl2 = (2729.75) Pair(14"696psi,750F)

Pair(14.696psi,TempOutside)

Table 10 - Leakage Flow Control Variable Inputs Case cv18 cv17 aO cv13 cv12 aO Number Variable Coefficient Variable Coefficient Coefficient Coefficient 1 425.14 1275.43 1372.16 2785.91 2 379.95 1139.86 1226.31 2489.79 3 416.57 1249.71 1344.5 2729.75 4 379.95 1139.86 1226.31 2489.79 5 416.57 1249.71 1344.5 2729.75 6 416.57 1249.71 1344.5 2729.75 7 425.14 1275.43 1372.16 2785.91 8 379.95 1139.86 1226.31 2489.79 9 379.95 1139.86 1226.31 2489.79 10 379.95 1139.86 1226.31 2489.79 11 420.39 1261.17 1356.82 2754.77 12 425.14 1275.43 1372.16 2785.91

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PAGE NO. 24 of 29 Table 11 Leakage Calculation Control Variables Overview Control Variables CV Func. Initial Coeff. Coeff. Upd. Int.

1. Description Form Value G aO Min Max Mult.

6 IPTop Door sum 14.67816 1 0 -1E+32 1E+32 0 7 DPLow sum 0.1687 27.71 14.68425 -1E+32 1E+32 0 81IP Upper sum 14.57613 1 0 -1E+32 IE+32 0 9 DPUpper sum 0.026893 27.71 14.5771 -1E+32 1E+32 0 10 Leakage DP Upper sum 0 27.71 14.58052 -5 5 0 11 Abs Roof Press if 0 1 0 -1E+32 1E+32 0 12 Turb Flow Upper exp 0 2785.91 0.5 0 1E+32 0 13 Leak Flow Up sum 0 1 0 0 1E+32 0 14!Upper Flow Dir if 0 1 0 -1E+32 1E+32 0 15 Leak DP Lower sum 0 27.71 14.68425 -5 5 0n 16Abs Door Pres if 0 1 0 -1E+32 1E+32 0 17 Turb Flow Low exp 0 1275.43 0.5 -10000 1E+32 0 18 Leak Flow Low sum 0 1 0 -10000 1E+32 0 191Lower Flow Dir if 0 1 0 -1E+32 1E+32 0 Table 12 - Leakage Control Variables Specifics Function Components Control Variable 11 Abs Roof Press if(alXl+aO<O alXl+a0=0 alXl+aO>O)

YfGa2X2 Y=Ga3X3 Y=Ga4X4 Gothic s Variable Coef.

1. Name location a I Cvval cvA00 2 Cvval cvl0 -1 3 Cvval cvl0 1 4 Cvval cv1 0 1 Function Components Control Variable 12 Turb Flow Upper exp Y=G*(aO+alXl)Aa2X2 or G*(alXl)AaO Gothic s Variable Coef.

1. Name location a 1 Cvval cv11 1

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PAGE NO. 25 of 29 Function Components Control Variable 13 Leak Flow Up sum Y=G*(aO+alXl+a2X2+...+anXn)

Gothic s Variable Coef.

1. Name location a 1 Cvval cvA1 1372.16 2 Cwal cvl2 1 Function Components Control Variable 14 Upper Flow Dir if(alXl+aO<O alXl+a0=0 alXl+aO>O)

Y=Ga2X2 Y=Ga3X3 Y=Ga4X4 Gothics Variable Coef.

1. Name location a 1 Cvval cvA0 2 Cvval cv13 -3 3 Cwal cvl33 4 Cwal cv133 Function Components Control Variable 15 Leak DP Lower sum Y=G*(aO+alXl+a2X2+...+anXn)

Gothic s Variable Coef.

1. Name location a 1 Cloal cv6 Function Components Control Variable 16 Abs Door Pres if(alXl~aO<O alXI+a0=0 alXl+aO>O)

Y=Ga2X2 Y=Ga3X3 Y=Ga4X4

____Gothics Variable Coef.

1. Name location a 1 Cwal cv15 1 2 Cvval cv15 -1 3,Cwal cv15 I 4 Cvval cv15 1

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I I , PAGE NO. 26 of 29 Function Components Control Variable 17 Turb Flow Low exp Y=G*(aO+alXl )A a2X2 or G*(alX1)A0aO Gothic s Variable Coef.

Name location a I Cvval cv16 Function Components Control Variable 18 Leak Flow Low sum Y=G*(aO+alXl+a2X2+...+anXn)

Gothic s Variable Coef.

1. Name location a 1 Cwal cv16 425.14 2 Cvval cvl7 1 Function Components Control Variable 19 Leak Flow Low if(alXl+aO<O alXl+a0=0 alXl+aO>O)

Y=Ga2X2 Y=Ga3X3 Y=Ga4X4 Gothic s Variable Coef.

1. Name location a 1 Cvval cvl55 2 Cvval cv18 -8 31Cvval cv18 I 41Cvval cv18 1

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PAGE NO. 27 of 29 Heater Inputs For all cases, Decay Heat (2H) to the Fuel Pool is included along with the heat load associated with operation of Fuel Pool Cooling (241). For the remainder of the cases, the heat loads are developed using Reference 3 documented heat loads. The nine heaters included in the model to represent the electrical and decay heat loads are summarized in the table. The Pump Room heaters represented by 23H and 25H are either turned off or set to values that represent the operation of HPCS pumps only (Refer to Table 40 of Reference 3). Heat loads associated with Main Building fan cooler operation (21H) are either turned off or in full operation, as defined in the table below (Refer to Table 39 of Reference 3). The Main Building equipment represented by 26H is either turned off or set to a steady state value. The steady state value is based on the value documented as the zero time value for equation 15 of Reference 3. This Reference 3 equation 15 relationship is appropriately used in Reference 3 to represent the release of stored heat from normally operating equipment that is assumed to trip following a LOCA. Since this analysis is associated with normal conditions, the steady state value is appropriate. The Refueling Floor heat load associated with a spent fuel canister is represented by Heater 22H (Refer to Table 39 of Reference 3). The value is either set to zero or to that assumed in the Reference 3 analysis.

Table 13 - Heater Inputs Case Pump Room Pump Room Main Main Main Main Main Refueling Refueling Floor Number Heater 23H Heater25H Building 1H Building Building Building Building Floor 22H (Fuel Pool Decay (BTU/sec) (BTUIsec) (BTUIsec) 21 H 24H Equipment Emergency (BTUIsec) Heat) 2H (BTUIsec) (BTUIsec) 26H Lighting 20H (BTU/sec)

(BTU/sec) (BTUIsec) 1 0 0 0 0 4.37 0 0 0 2,720.56 2 0 0 0 0 4.37 0 0 0 2,720.56 3 0 0 0 0 4.37 0 0 0 2,720.56 4 127.33 6.65 43.24 10.95 4.37 73.14 0 21.8 2,720.56 5 127.33 6.65 0 0 4.37 0 0 0 2,720.56 6 127.33 6.65 43.24 10.95 4.37 73.14 0 21.8 2,720.56 7 127.33 6.65 43.24 10.95 4.37 73.14 0 21.8 2,720.56 8 127.33 6.65 43.24 10.95 4.37 73.14 0 21.8 2,720.56 9 0 0 0 0 4.37 0 0 0 2,720.56 10 127.33 6.65 0 0 4.37 0 0 0 2,720.56 11 0 0 0 0 4.37 0 0 0 2,720.56 12 127.33 6.65 43.24 10.95 4.37 73.14 0 21.8 2,720.56

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PAGE NO. 28 of 29 Primary Containment Heat Sources The Reference 3 model simulates the heat transfer of Primary Containment to the Secondary Containment.

Under the conditions in this analysis, these effects are neglected, since no accident is assumed. The Drywell is assumed to be at 135°F and the Wetwell is assumed to be 950F.

Analysis Results The drawdown time is established based on the time required to reach 0.25 in wg pressure differential at the instrument. The time to reach the drawdown condition will be based on the volume 1 value that is 0.25 in wg below its initial value (Table 7). Recall that the volume's initial conditions are established based on the instrument reading 0.0 in wg. Therefore, provided the volume has only a minor temperature change during the analysis period (<5'F), this 0.25 in wg pressure differential shift is appropriate.

PressureGoal= PresslCVoll- O.25in 27.71inhpsi The pressures and times they occur are documented in Table 14.

Table 14 - Drawdown Time Study Results Case Time For Instrument to Volume I pressure that corresponds Number reach 0.25 in wg with Instrument Reading at 0.25 in wg (sec) (psia) 1 42.9233 14.64617799 2 31.1233 14.63807799 3 40.4233 14.64477799 4 62.1431 14.63807799 5 40.6233 14.63807799 6 532.178 14.64137799 7 268.143 14.63267799 8 478.143 14.63987799 9 56.1431 14.63267799 10 92.1431 14.63267799 11 56.1431 14.64477799 12 402.143 14.64137799 ENWC-001-PR-01 Page2 8 of 2 9

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PAGE NO. 29 of 29 Conclusions The procedural steps and tables developed in this report can be included as an attachment to the Reference 1 procedure. The time to drawdown the building during a surveillance test to reach 0.25 in wg will range between 30 and 532 seconds. The exact time will be dependent upon the weather conditions as well as building internal heat loads as can be seen in Table 14.

Appendices

1. Instrument location and Railroad Door wind pressure coefficient evaluations (9 pages)

2. GOTHIC Model Input Deck (30 pages)

3. Procedure and Tables (174 pages)

4. Annubar Correction Factor Data (2 pages)

5. Design Verification (3 pages)

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PAGE NO. 1 of 9 Appendix 1 Wind Pressure Coefficient Development

A~D L22~2.~.j 1A, 18, 1A, 18 00 7. 70. ~00 506 0 60" 10 -14 10 0 0'0 A 10 A0 7000.. 6o 200

-40

-770

-A 183 lA3

-70 .- 40 -.95

-40 45-0

-40 .S

-A T uI din. Oit.ectlon Veort and Hlu118

-ASHRAE 1997 FUNDAMENTALS CHAPTER-15 .

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PAGE NO. 1 of 30 APPENDIX 2 GOTHIC INPUT DECK Appendix 2

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PAGE NO. 2 of 30 Control Volumes Vol Vol Elev Ht Hyd. D. LN IA Burn

1. Description (ft3) (ft) (ft) (ft) (ft2) Opt I Reactor Building 1804568.96 441 163.875 28.9 DEFAULT NONE 2 SGTS Fan Inlet 1000 577 1.5 1.5 DEFAULT NONE 3 Fuel PoolIPiping 10 568.125 .11 1 DEFAULT NONE 4 Pump Rooms 345121.1 422.25 46.75 69.07 DEFAULT NONE 5 Fuel Pool Floor 1321336.77 604.367 63.303 31.34 1360 NONE Laminar Leakage Lk Rate Ref Ref Ref Sink Leak Vol Factor Press Temp Humid /Src Model Rep Subvol Area

1. (%lhr) (psia) (F) (%) BC Option Wall Option (ft2) 1 0 CNST T UNIFORM DEFAULT 2 0 _ CNST T UNIFORM DEFAULT 3 0 CNST T UNIFORM DEFAULT 4 0 CNST T UNIFORM DEFAULT 5 0 CNST T UNIFORM DEFAULT Turbulent Leakage Lk Rate Ref Ref Ref Sink Leak Vol Factor Press Temp Humid ISrc Model Rep Subvol Area

1. (%Ihr) (psia) (F) (%) BC Option Wall Option (ft2) fL/D 1 0 CNST T UNIFORM DEFAULT 2 0 CNSTT UNIFORM DEFAULT 3 0 CNST T UNIFORM DEFAULT 4 0 CNST T UNIFORM DEFAULT 5 0 CNST T UNIFORM DEFAULT Appendix 2

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I I I PAGE NO. 1 of 174 Appendix 3 Procedural Steps and Supporting Tables ENWC-001-PR-01 APPENDIX 3

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PAGE NO. 2 of 174 Procedural Steps The procedural steps to be used in the procedure are provided below. The numbering scheme referenced in the steps are associated with the current procedure documented in Reference 1.

Steps 1 through 7 record and then average the data values determined in the main portions of the procedure.

The averaging of the data is a simple numeric averaging of the values (Sum of values divided by the number of values recorded).

Value/Time Average I Value

1. Record Wind Speed (mph) and time obtained from Step 7.1.28

2. Record Wind Direction (i.e., SE, W, etc.) and time (i.e.,

1800 = South)

3. Record Outside Air Temperature and Time

4. Record Inside Air Temperature and Time obtained from SGTS Entrance

5. Record SGTS Flow Rate (ICFM)

6. Record SGTS Temperature Rise (0F)

7. Identify DP Instrument Location as indicated in Figure t.

8. Record the identified DP Instrument Reading (inwg)

The remainder of this evaluation will use the averaged values provided in Steps I through 8 above.

9. Determine Wind Induced DP (inwg)

Using Instrument Wind Pressure Tables (Table A)

10. Subtract Line 9 from Line 8 to obtain the Static Pressure Differential at the instrument location (Record Result)

Determination of Leakage Rate at Roof Level:

11. Determine the Change of Static Pressure Differential between Roof Level and Instrument Location, using Surface Static Pressure Adjustment Tables (Table B)

(Record Value)

12. Determine the Static Pressure Differential at the Roof Level by adding Line 10 and 11.

13. Determine Wind Induced Average DP, using Surface Wind Pressure Tables (Table C) for the Roof Level (inm1g) _____+

14. Determine the total DP at the Roof Level by adding Lines 13 and 12.

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PAGE NO. 3 of 174

15. Determine the Roof Level Leakage Flow (ACFM),

using Leakage Flow Tables (Table D) for the Roof Level Determination of Leakage Rate at Railroad Door:

16. Determine the Change of Static Pressure Differential between Railroad Door Level and Instrument Location Using Surface Static Pressure Adjustment Tables (Table B)

(Record Value)

17. Determine the Static Pressure Differential at the Railroad Door by adding Lines 10 and 16. +_____ _____

18. Determine Wind Induced DP, using Surface Wind Pressure Tables (Table C) for the Railroad Door (inwg)

19. Determine the total DP at the Railroad Door Level by adding Lines 18 and 17. _____+_____ _____

20. Determine the Railroad Door Level Leakage Flow (ACFM), using Level Leakage Flow Table (Table D) for the Railroad Door.

Determination of Total Building Leakage Rate:

21. Determine the Analytical Leakage Flow by adding Lines 20 and 15. _____+_____ _____

22. Determine the Annubar Temperature by adding Lines 4 and 6. _____+_____ _____

23. Using the SGTS Flow Correction Factors For ACFM Table (Table E), convert SGTS Flow (line 5) to ACFM *

24. Is the value in Step 21 greater than or equal to Step 23?

If the answer to Step 24 is yes, then the test successfully demonstrated the analytical model bounds of the actual plant leakage characteristics. If the answer to Step 24 is no, then the plant conditions are outside of the drawdown analysis assumptions.

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PAGE NO. 4 of 174 Penetration Margin Available This step in the procedure converts the leakage flow into an equivalent flow at 0.25"wg on all surfaces of the building. The flow is converted and used to establish a flow margin. Information will be provided to convert the flow margin into an equivalent orifice size to account for changes or modifications that will penetrate the building boundary.

25. Roof Level Leakage Flow Calculated in Step 15 (ACFM) '_

26. Railroad Door Leakage Flow Calculated in Step 20 (ACFM)

27. Total the Calculated leakage by adding lines 25 and 26

28. Take the Ratio of Measured Leakage Flow (Step 23) and the total Calculated Leakage (Step 27)

29. Multiply the allowable leakage limit (2430cfin) by the ratio established in Step 28. 2430cfm *

30. Subtract the allowable Leakage limit (2430cfm) from the value calculated in Step 29 to establish the margin. 2430cfin -_____

31. Using the margin (Step 30), and the Equivalent Orifice Size Table (Table F) record the penetration margin area (in2)

ENWC-001-PR-01 APPENDIX 3

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I i I PAGE NO. 5 of 174 Railroad Door This Side IA2 1B2 N

- IA3 900(4500)

IBI -

1800 (54) 00(3600)

- 1133 2700 Associated Degrees Measured by the IAI - Met Tower Instrumentation IA4 IB4 133' --1 Figure 1 - Instrument Locations ENWC-001-PR-01 APPENDIX 3

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TABLE OF CONTENTS TABLE A INSTRUMENT WIND PRESSURE TABLES ENWC-001-PR-01 APPENDIX 3 Page 6 of 174 Table A Page 1 of 131

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1A1 EAST Page ........................................................ 4 1A2 EAST Page ........................................................ 6 1A3 EAST Page ........................................................ 8 1A4 EAST Page ........................................................ 10 18B1 EAST Page ........................................................ 12 1 B2 EAST Page ........................................................ 14 1B3 EAST Page ........................................................ 16 1B4 EAST Page ........................................................ 18 1A1 NORTH Page ........................................................ 20 1A2 NORTH Page ........................................................ 22 1A3 NORTH Page ........................................................ 24 1A4 NORTH Page ........................................................ 26 18B1 NORTH Page ........................................................ 28 1B2 NORTH Page ........................................................ 30 1 B3 NORTH Page ........................................................ 32 1B4 NORTH Page ........................................................ 34 1A1 NORTHEAST Page ........................................................ 36 1A2 NORTHEAST Page ........................................................ 38 1A3 NORTHEAST Page ........................................................ 40 1A4 NORTHEAST Page ........................................................ 42 1831 NORTHEAST Page ......................................................... 44 1832 NORTHEAST Page ........................................................ 46 1833 NORTHEAST Page ........................................................ 48 1834 NORTHEAST Page ........................................................ 50 1A1 NORTHWEST Page ........................................................ 52 1A2 NORTHWEST Page ........................................................ 54 1A3 NORTHWEST Page ........................................................ 56 1A4 NORTHWEST Page ........................................................ 58 18 NORTHWEST Page ........................................................ 60 18B2 NORTHWEST Page ........................................................ 62 Table A Page 2 of 131 ENWC-001-PR-01 APPENDIX 3 Page 7 of 174

I 183 NORTHWEST Page ....................................................... 64 1B4 NORTHWEST Page ....................................................... 66 1Al SOUTH Page ........................................................ 68 1A2 SOUTH Page ....................................................... 70 1A3 SOUTH Page ....................................................... 72 1A4 SOUTH Page ........................................................ 74 181 SOUTH Page ....................................................... 76 1B2 SOUTH Page ....................................................... 78 1B3 SOUTH Page ........................................................ 80 1B4 SOUTH Page ....................................................... 82 1A1 SOUTHEAST Page ....................................................... 84 1A2 SOUTHEAST Page ....................................................... 86 1A3 SOUTHEAST Page ....................................................... 88 1A4 SOUTHEAST Page ....................................................... 90 181 SOUTHEAST Page ........................................................ 92 1B2 SOUTHEAST Page ........................................................ 94 183 SOUTHEAST Page ........................................................ 96 184 SOUTHEAST Page ........................................................ 98 1A1 SOUTHWEST Page ........................................................... 100 1A2 SOUTHWEST Page ............................................................ 102 1A3 SOUTHWEST Page ............................................................ 104 IA4 SOUTHWEST Page ............................................................ 106 181 SOUTHWEST Page ............................................................ 108 182 SOUTHWEST Page ............................................................ 110 1B3 SOUTHWEST Page ............................................................ 112 1B4 SOUTHWEST Page ............................................................ 114 1A1 WEST Page ............................................................ 116 1A2 WEST Page ............................................................ 118 1A3 WEST Page ............................................................ 120 1A4 WEST Page ............................................................ 122 181 WEST Page ........................................................... 124 1B2 WEST Page ............................................................ 126 1B3 WEST Page .......... ............... 128 184 WEST Page ............................................................ 130 Table A Page 3 of 131 ENWC-001-PR-01 APPENDIX 3 Page 8 of 174

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INSTRUMENT DESIGNATION AND WIND DIRECTION 1A1 EAST MPH -20F -1OF OF 10F 20F 30F 40F 50F 60F 70F 75F 8OF 85F 90F 95F 10OF 105F 0 0 0 0 0 0 0 0h 0 0 a 0 0 0 0 01 0 0 1 -000026 -0.00025 -0.0024 -0.00024 -000023 -0.00023 -000023 -0.00022 -0.00022 -0.00021 -0,00021 -0.00021 -0.00021 -0.00020 -0.00020 -0.00020 .0.0002 2 -0.00102 -0.00100 -0.00098 -0.00096 -000094 -000092 -0,00090 -000088 -0.00087 -0 00085 -0,00084 -0.00083 -0,00083 -0.00082 -0.00081 -0.00080 -0,0006 3 -0.00230 -0.00225 -0.00220 -0.00215 4,00211 -0.00207 -0.00203 -0.00199 -0.00195 -0.00191 -0.00189 -0.00187 -0,00186 -0.00184 0*000182 -0.00181 -0.00179 4 -0.00409 -0.00400 -0.00391 -0.00383 -0.00375 -0.00367 -0.00360 -0.00353 -0.00346 -0.0034 0*0.0336 -0.00333 -0,00330 -0.00327 -0.00324 -0.00321 -0.00319 5 -0.00639 -0.00625 -0.00611 -0.00598 -0.00586 -0.00574 -0.00563 -0.00551 000541 -0.00531 -0.00526 -0.00521 -0900516 -0.00511 -0.005071 -0.00502 -0.00498 6 -0.00921 -0.00900 -0.00881 -0.00862 -00*0844 -0.00827 -000810 -0.00794 -0,00779 -0.00764 -0.00757 -0,0075 00743 -0.00736 -0.0073 -0.00723 -000717 7 -001253 -0.01225 -001198 -0.01173 -0.01149 -0.01125 -0.01103 -0.01081 -001060 -0.01040 -0.01030 -0.01021 -0,01011 -001002 -000993 -0.00984 -0,00976 8 -001637 -001600 -001565 -0.01532 -0.01500 -0.01469 -0.01440 -0.01412 0,01385 -0.01358 -0.01346 -0.01333 -001321 -0.01309 -0.01297 -0.01286 -0.01274 9 -0.02071 -0.02025 -0.01981 -0.01939 .-0.01899 -00186 -0.01823 -0.01787 -0.01752 -0.01719 ,001703 -0.01687 0,010672 -0.01657 0.01642 -0.01627 -0.01613 10 -0.02557 -0.02500 -0.02446 -0.02394 -002344 -0.02296 -0.02250 -0.02206 -0.02163 -0.02123 -0.02103 -0.02083 -0,02064 -0.02045 -0.02027 -0.02009 -0.01991 11 -003094 -0.03025 -0,0296 -0.02896 -0.02836 -0.02778 -0.02723 -0.02669 -0.02618 -0.02568 -0,02544 -0.02521 -02498 -0.02475 -0.02453 -0.02431 -0.02409 12 -0.03682 -003600 -003522 -003447 -003375 003306 -0032400 -0.03177 -0.03115 -0.03057 -0.03028 -0.03 -0.02972 -0.02945 -0.02919 -0.02893 -0.02867 13 -0,04322 -0.04225 -0.04134 -0 04046 -0.03961 -0 03880 -0.03803 -0.03728 -003656 -0.03587 -0.03554 -0.03521 -0'03488 -0.03457 -0U03426 -0.03395 -0.03365 14 -005012 -0.04901 -0.04794 -0.04692 -0.04594 -0.04500 -04410.0.04324 -0,04240 -0.04160 -004121 -0.04083 -0,0404 -0.04009 -0.03973 -0.03937 -003902 15 -0.05754 -0.05626 -0.05503 -0.05386 -0.05274 -0.05166 -0.05063 -0.04963 -0.04868 -0.04776 -0,04731 -004687 -0.04644 -0.04602 -0.04561 -0.0452 -0.0448 16 -0.06546 -0.06401 -0.06261 -0.06128 -006000 -0.05878 -005760 -0.05647 '-.005539 -0.05434 -0,05383 -0.05333 -0,05284 -0.05236 -005189 -0.05143 -0.05097 17 -0.07390 -0.07226 -0.07069 -0.06918 -0.06774 -0.06636 -0,06503 -0.06375 -006252 -0.06134 -0.06077 -0.06021 -.005965 -0.05911 -0.05858 -0.05806 -0.05754 18 -0.08285, -0.08101 -0.07925 -0.07756 -0 07594 -0.07439 -0.07290 -0.07147 i -0.0701 -0 06877 -0.06813 -0.0675 -0_06688 -0.06627 -0.06567 -0.06509 -0.06451 19 -0.09231 -0.09026 -0,0883 -0.08642 -0.08461 -0.08289 -008123 -0.07963 -0,07810 -0.07663 -0.07591 -0.07521 -007452 -0.07384 -0.07317 -0.07252 -0.07188 20 -0.10229 -0.10001' -009783 -009575 -009376 -009184 -009000 -0.08824 -008654 008491 008411 -008333 -0.08287 -0.08182 008108 -008035 -0.07964 21 -011277 0.11026 0,10786 -0.10557 -0.10337 -0.10125 -009923 009728 009541 -009361 -0.09273 009187 -00910 -009020 008939 008859 -0.08781 22 -0.12377 -0.12101 0,11838 -0.115861 -0,11344 -0.11113 -0.10890 -0.10677 -0.10471 -0.10274 -01,0177 -0.10083 4.09991 -0.099 009810 -0.09723 -0.09637 23 -0.13527 .0.13226 0.12939 -0.12663 -01,2399 -0.12146 -0.11903 .0.11669 -0,11445 -0.11229 .0.11124 -0.11021 -0.10919 -0.10820 .10723 -0.10627 0.10533 24 -0.14729 -0.14402 -0.14088 -0.13788 1-0.135011 -013225, -0.129601 -0.12706 -12462 -0.12226 0.12112 -0.12 -01189 011782 011675 11571 -011469 25 15982 -0.15627 -0,15287 -0.149611 -0146491 -0.14350 -0.14063 -0.13787 -0.13522 -0.13266 -0.13142 -0.13021 -012901 012784 -0.12669 -0.12555 .0,12444 26 -0017286 -0.16902 -0.16534 -0.16182.-0158451 -0.155211 -0,15211 -0.14912 -0.14625 -0.143491 0.14215' -0.14083 -0,139541 -0.138271 -01.3702 -0.1358 -01346 Table A Page 4 of 131 ENWC-001-PR-01 APPENDIX 3 Page 9 of 174

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SHEET REV. 0 PAGE NO. 137 of 174 Table B Surface Static Pressure Adjustment Tables Appendix 3 Table B

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PAGE NO. 138 of 174 Railroad Door - Static DP Adjustm ent................................................................................................... 139 Roof Level - Static DP Adjustm ent ...................................................................................................... 140 Appendix 3 Table B

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Roof East, West Page ........................................................ 3 Roof North , South Page ........................................................ 5 Roof NorthEast, SouthEast, NorthWest, Page ........................................................ 7 SouthWest RR Door East Page ........................................................ 9 RR Door North Page ........................................................ 11 RR Door NorthEast Page ........................................................ 13 RR Door NorthWest Page ........................................................ 15 RR Door South Page ........................................................ 17 RR Door SouthEast Page ........................................................ 19 RR Door SouthWest Page ........................................................ 21 RR Door West Page ........................................................ 23 Table C Page 2 of 24 ENWC-001-PR-01 APPENDIX 3 Page 142 of 174

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Roof Wind Direction East, West MPH -20F -1OF OF 1OF 20F 30F 40F 50F 60F 70F 75F BOF 85F 90F 95F 10OF 105F 0 0 0 0 0 0 0 0 1 0 0 0 0 0 ~ 0 0 0 0 0 1 -0.00019 -0.00019 -0.00018 -0.00018 .0.00017 -0.00017 -0.00017 -0.00016 -0.00016 -0.00016 --0.00016 -0.00015 -0.000,5 -0.00015 -0.00015 -0.00015 .0.00015 2 -0.00076 -0.00074 -0.00073 -0.00071 -0.0007 -0.00068 -0.00067 -0.00066 -0.00064 -0.00063 -0,00063 -0.00062 -0.00061 -0.00061 -0.00060 -0.0006 -0.00059 3 -0.00171 -0.00167 -0.00184 -0.00160 -0.00157 -0.00154 -0.00151 -0.00148 -0.00145 -0.00142 -0.00141 -0.00139 -0.00138 -0.00137 -0.00136 -0.00134 -0.00133 41-0.00304 -0.00297 -0.00291 -0.00285 -0.00279 -0.00273 -0.00268 -0.00262 -0:00257 -0.00252 -0.00250 -0.00248 1-0.00246 -0.00243 -0.00241 -0.00239 -0.00237 5 -0.00475 -0.00465 -0.00455 -0.00445 -0.00436 -0.00427 -0.00418 -0.0041 -0.00402 -0.00395 -0.00391 -0.00387 -0.00384 -0.00380 -0.00377 -0.00373 40.00370 6 -0.006*4 -0.00669 -0.00655 -0.00641 -0.00627 -0.00615 -0.00602 -0.00590 -0.00579 -0.00568 -0.00563 -0.00558 -0.00552 -0.00547 -0.00542 -0.00538 -0.00533 7 -0.00932 -0.00911 -0.00891 -0.00872 -0.00854 -0.00836 -0.0082 -0.00804 -0.00788 -0.00773 -0.00766 -0.00759 -0.00752 -0.00745 -0.00738 -0.00732 -M000725 8 -0.01217 -0.0119 -0.01164 -0.01139 -0.0111,5 -0.01093 -0.01071 -0.0105 -0,01029 -0.0101 -0.01001 -0.00991 -0.00982 -0.00973 -0.00964 -0.00956 -0.00947 9 -0.0154 -0.01506 -0.01473 -0.01442 -0.01412 -0.01383 -0,01355 -0.01328 -0.01303 -0.01278 -:001266 -0.01255 -0.01243 -0.01232 -0.01221 -0.0121 -0.01199 10 -0.01901 -0.01859 -0.01818 -0.0178 -0.01743 -0.01707 -0.01673 -0.0164 -0,01608 -0.01578 -0.01563 -0.01549 -0.01535 -0.01521 -0.01507 -0.01494 -0.01480 11 -0.02300 -0.02249 ý0.02200 -0.02153 -0.02109 -0.02065 -0,02024 -0.01984 -0.01946 -0.0191 -0.01892 -0.01874 -0.01857 -0.0184 -0.01823 -0.01807 -0.01791 12 -0.02738 -0.02677 -0.02619 -0.02563 -0.02509 -0.02458 -0.02409 -0.02362 ý-0,02316 -0.02272 -0.02251 -0.02230 -0.'0221 -0.0219 -0.0217 -0.02151 -0.02132 13 -0.03213 -0.03141 -0.03073 -0.03008 1-0.02945 -0.02885 -0,02827 -0.02772 -0.02718 -0.02667 -0.02642 -0.02618 -0.02594 -0.0257 -0,02547 -0.02524 -0,02502 14 -0.03726 -0.03643 -0.03564. -0.03488 -0.03415 -0.03346 -0.03279 -0.03214 -0,03153 -0.03093 70.03064 -0.03036 -0.03008 -0.02981 -0.02954 -0.02927 -0.02901 15 -0.04277 -0.04182 -0.04091 -0.04004 -0,03921 -0.03841 -0,03764 -0.0369 -0,03619 -0.03551 -0.03517 -0.03485 -0.03453 -0.03421 -0.03391 -0.03360 -0.03331 16 -0.04867 -0.04759 -0.04655 -0.04556 -0.04461 -0.0437 -0.04282 -0.04198 -0,04118 -0.0404 -0.04002 -0.03965 10.03929 -0.03893 -0.03858 -0.03823 -0.03789 17 -0.05494 -0.05372 -0.05255 -0.05143 -0.05036 -0.04933 -0.04834 -0.0474 -0.04648 -0.04561 -0.04518 -0.04476 -0,04435 -0.04395 -0,04355 -0.04316 -0.04278 18 -0.0616 -0.06023 -0.05892 -0.05766 -0.05646 -0.05531 -0.0542 1-0.05314 -0.05211 -0.05113 -0.05065 -0.05018 -0,04972 -0.04927 -0.04883 -0.04839 -0,04796 19 -0.06863. -0.06710 -0.06564 -0.06425 4,06291 -0.06162 -0.06039 -0.05920 05806 -0.05697 -0.05644 -0.05591 -0.0554 -0.0549 -0.0544 1-0.05391 -0.05344 20 -0.07604 -0.07435 -0.07274 -0.07119 -0.06970 -0.06828 -0.06691 -0.0656 -0U06434 -0.06312 -0.06253 -0.06195 -0.06138 -0.06083 -0.06028 -0.05974 -0.05921

-0.07685 -0.07528 -0.07377 -0.07232 -0.07093 -0.06959 -0.06894 -0.06830 -0.06768 -0.06706 -,006646 -0.06586 -,06528 21 -0.08384 -0.08197 -0.08019 -0.07848 22 -0.09201 -0.08997 -0.08801. -0.08614 -0.08434 -0.08262 -0.08096 -0.07938 -0.07785 -0.07638 -0.07566, -0.07496 -0.07428 -0.0736 -0.07294 -0.07228 -0.07164 23 -0.10057 -0.09833 -0.09619 -0.09414 -0.09218 -0.0903 -0.08849 -0.08676 -0,08509 -0.08348 -0.0827 -0.08193 -0,08118 -0.08044 -0.07972 -0.07901 -0.07831 24 -0,10950 -0.10707 -0,10474 -0.10251 40.10037 -0.09832 -0,09635 -0.09446 -0,09265 -0.0909 1-0.09005 -0.08921 -0.08839 -0.08759 -0.0868 -0.08602 -0.08526 25 -0.11882 -0.11618 -0.11365 -0.11123 -0.10891 -0.10669 -0.10455 -0.1025 -0.10053 -0.09863 1.0.09771 -0.09680 -0.09591. -0.09504 -01M09418 -0.09334 -0.09252

-0.12566 -0.12292 -0.12031 -0.1178 *-0.11539 -0,11308 -0.11086 -0,10873 -0.10668 -0.*0568 1 -0.1047 -0.10374 -0.1028 -,0.10187 -0.10096 -010007 26 -0.12851 27 -0.13859 -0.13551 -0.13256 -0.12974 -0.12703 -0.12444 -0.12195 -0.11956 -0.11725 -0.11504 -0.11397 -0.1291 1-0,111s7 -0.11086 -0,10986 -0.10887 -01079I Table C Page 3 of 24 ENWC..001 -PR-01 APPENDIX 3 Page 143 of 174

ir NO. ENWC-001-PR-01 PROJECT REPORT COVER SHEET REV. 0 ENERCON SERVICES, INC.

PAGE NO. 165 of 174 Table D Leakage Flow Tables Appendix 3 Table D

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I I __ ,PAGE NO. 166 of 174 Railroad Door - Leakage Flow Rate (ACFM ) ........................................................................................ 167 Roof Level - Leakage Flow Rate (ACFM) ............................................................................................ 169 Appendix 3 Table D

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PAGE NO. 171 of 174 Table E SGTS FLOW CORRECTION FACTORS FOR ACFM Appendix 3 Table E

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I_ f_ ,PAGE NO. 172 of 174 SGTS FLOW CORRECTIONFACTORS FOR ACFM ANNUBAR CORRECTION ANNUBAR, CORRECTION ANNUBAR 'LCORRECTION TEMPERATURE "FACTOR TEMPERATURE FACTOR, TEMPERATURE FACTOR (O)(OF) (OF) 50 1.0904 105 1.1617 160 1.2807 55 .096'2" 110" ""1.16967i: 165' '1'.2973 60 1.1022 115 1.1778 170 1.3156 65 ~ 1.1082 J 120864 75i1<' 1.3356 K 70 1.1143 125 1.1956 180 1.3579 75 1.1205 _3. 1.2053 18 .r3826"'i 1V 80 1.1268 135 1.2157 190 1.4103 8,1.1334 1""740 1 *2268" 195 91.4415 90 1.1401 145 1.2387 200 1.4768 100 1.1542 155 1.2656 Appendix 3 Table E

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PAGE NO. 173 of 174 Table F EQUIVALENT ORIFICE SIZE TABLE Appendix 3 Table F

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PAGE NO. 174 of 174 Flow Orifice

• Oriffice Area Flow ~ Orifice Orifice Area (cfni) Diameter , (in2) Wcm) Diameter (in2)

(in__ _ (in) 100, ~2.95 6.84 950 ~9.09~ 64.94~

125 3.30 8.54 975 9.21 66.65

~150, 10.25 ~1000 175 3.90 11.96 1025 9.45 70.07 6200 4.17 13.67 1050. 9.56~ 71.78 225 4.43 15.38 1075 9.67 73.49 250k 466 A7ý.09~ 11~J00~ 9.78: 75.19 275 4.89 18.80 1125 9.90 76.90 300 5.11 ~720.51 ~1150 10.00; 78.61 325 5.32 22.22 1175 10.11 80.32 350 5.52 23.93 1200 10.22 82.03 375 5.71 25.63 1225 10.33 83.74 400 5.90 ~27.34 1250 10.43~ 85.45, 425 6.08 29.05 1275 10.53 87.16 450~ 6.26 30.76 13,00 88.87 475 6.43 32.47 1325 10.74 90.58 500 _6,60 34.18 1350 10.84 92.28 525 6.76 35.89 1375 10.94 93.99 55~0 37.60 1400. 11.04, 95.70 575 7.07 39.31 1425 11.14 97.41 600 7.23 41.02 1450 11.23 99.12 625 7.38 42.72 1475 11.33 100.83 650, 7.52 44.43 1500 11.43 102.54 675 7.66 46.14 1525 11.52 104.25 700 7.81 47.85 1550 ,11.61 '105.96 725 7.94 49.56 1575 11.71 107.66 750 8.08 1600 A 109.37 775 8.21 52.98 1625 11.89 111.08 800 8.34 54.69 1650 11.98 112.79 825 8.47 56.40 1675 12.07 114.50 8.60 581A0 1700 12.16 >116.21~

875 8.73 59.81 1725 12.25 117.92 900 8.85 61.52 1775 12.34 119,63 925 8.97 63.23 1775 12.43 121.34 Appendix 3 Table F

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PAGE NO. I of 2 Appendix 4 SGTS FLOW RECORDER CORRECTION FACTOR Appendix 4

NO. ENWC-001-PR-01 F 1'4 *,*,

PROJECT REPORT COVER SHEET REV. 0 ENERCON SERVICES, INC.

PAGE NO. 2 of 2 Annubar Correction Factors I!,

r

'-1 C

A 5

a a.

a.

a I B B,.

Ii -

S S

U, U

a..

F..a I

MA I.

MI.

I

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1II

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-'a Vagi-au4 R 42 Appendix 4