ML061280117

ER-W3-2000-0334-000, Heating Ventilation and Air Conditioning Equipment Room and Component Cooling Heat Exchanger Room Calculations Correction

ML061280117
Person / Time
Site:	Waterford
Issue date:	12/01/2005
From:	Touna M Entergy Nuclear South
To:	Office of Nuclear Reactor Regulation
References
ER-W-2000-0334-000
Download: ML061280117 (10)

Text

l. OVERVIEW/ SIGNATURES Facility : Waterford 3 Document Reviewed: ER-W3-4 0-0334-000 ChangelRev .:

System Designator(s)IDescription :

RAB +46 Elevation HVAC Equipment Room Component Cooling Water (CCW) Heat Exchanger "B" Room Description of Proposed Activity:

Calculation 3-G was originally prepared to size the supply and exhaust fans for the HVAC Equipment Room . However, mistakes its the calculation were discovered and calculation 3-G was revised . The revision determined that the current capacities of the supply and exhaust fans were not adequate to maintain a room temperature of 104F during worst case post-accident conditions . Therefore, the HVAC Equipment Room post-accident design basis temperature will be increased from 104F to 120F to accommodate the calculated post-accident room temperature profile which was determined in calculation ECS05-012.

Calculation 5-C was originally prepared to size the room coolers in the CClil Pump and Heat Exchanger Rooms. However, mistakes in the calculation were discovered and calculation 5-C was revised. The revision determined that the current capacity of the room cooler located in the CCW Heat Exchanger <<$" Roam was not adequate to maintain a post-accident room temperature of 1C14F. Therefore, the CCW Heat Exchanger "B Room post-accident design basis temperature will he increased from 1041=' try 107F to armmrmadate the existing rapacity of the room cooler.

Check the applicable revlew(s): (only the sections indicated must be included in the Review.)

1 EDITORIAL CHANGE of a Licensing Basis Document Section I

© SCREENING Sections t and 11 required 4 E, S0 .§9 EVALUATION EXEMPTION +/- Sections 1, 11, and tit required 50.59 EVALUATION (#: "' 0?_ 7 1 1 Sections I, 11, and IV required Name (print)/ Sig;nature Reviewer : F7W Russo I Company I Department f Date OSRC: A j1 e,ea / -l_X50 C

(Required'oniy for Prorarnm atir. xciusion Screening% and 50 .5q Evaluations-)

1..1-1E11-(11, Rev . 8 ; Effective Date : 6123105

It . SCREENINGS A. Licensina Basis Document Review

9. Does the proposed activity impact the facility or a procedure as described in any of the following Licensing Basis Documents?

i Operating License i YES NO CHANCE # and/or SECTIONS IMPACTED 1 Operating License 1, TS © lei NRC Orders (~

' if "YES," obtain NRC approval prior to implementing the change by initiating an LBD change in accordance with NMM LI>>993 . (See LI-901 for exceptions.)

LBDs controlled under, 5{5 .59 1 YES NO CHANGE ' (it applicable) collier i SECTIONS IMPACTED 1=SAR I  ; I Table 3.11-1, Sheet 2 of 8 (DRN-Q4- ¬ 197)

TS Bases C ox E

Technical Requirements Manual Core Operating Limits Report [ 3 -

NRC Safety Evaluation Report and  ; [

supplements for the initial FSAR' NRC afnty Fvniuntions for I © amendments to the Operating License' I If "YES," perform an Exemption Review per Section III OR perform a 50 .5+3 Evaluation per Section Iii QR obtain NRC approval prior to implementing the change by initiating an LBD change in accordance with NMM U-°193 . If obtaining NRC approval , document the LSD change in Section II .A.S. However, the charge cannot be implemented until approved by the NRC. Complete Section It .

3 L8Ds controlled under other YES ` NO CHANGE # (if applicable) and/or regulations SECTIONS IMPACTED Qual ity Assurance Program Manu al ° ~ .

Emergency Plane' 3

t. . . . .. _. T . . ... . .. . .. , T. .. .. .~__ .__.__ .._..

E= ire Protection Program' q .... . .

(includes the Fire Ha zards Analysis) _

off_3ite Dose Calnulotions ManUOl a, 4 '

If "YES," evaluate any changes in accordance with the appropriate regulation AND initiate an LSD L change in accordance with NM M LIA13.

' If "YES,"see Lt-101 . No in BD change is recioired If "YFS, .' notify the responsible department and ensure a 50 .54 evaluation is performed Attach the 50 evaluation 3 Changes to the Ernergenvy Pan, s=ire Protection Program, and Offsi ;e Dose Calculation Manual must be approved by the OSRC :n accordance wifh NMM OAS-119.

if "YES ." evaluate the change in accordance with the regorernents of the facility's Operating License Condition or under 50 .59, as awrooriate .

L1-109-01, Rev. 8 ; Effective Date : 6123105

2. Does the proposed activity involve a test or experiment not described in the FSAR? D Yes If "YES, , perform a 50.63 Evaluation per Section 1V OR obtain NRC approval prior to implementing the change VD Initiate an LBD change In accordance with NMM LI-'t 13, If applicable. If obtaining NRC approval, document the change in Section II.A.5. However, the change cannot be Implemented until approved by the NRC . Complete Section If.

3. Basis Explain wry the proposed activity does or does not impact the Operating i~icensef rechnical Specifications and/or the FSAR . it the proposea activity Involves a patenilat test or experiment not previously described in the FSAR also include an explanation . Discuss other L8Ds if impacted . Adequate basis must be provided within the screening such that a third-party reviewer can reach the same conclusions . Simply stating that the change does not affect 1"S or the FSAR is not an acceptable basis .

The Licenses Basis Documents were searched to determine all documents that discussed the design basis for the Heating and Ventilation (H&V) Equipment Room located on the +46 elevation of the Reactor Auxiliary Building (RAB) and the CCW Heat Exchanger "B" Room . Specifically, any reference to the post-accident design basis room temperature was searched far.

Operating License/Technical Specifications The LCOs, surveillances and other controls in the OUTS do not over areas that are being impacted by the proposed change.

FSAR FSAR Section 9.4.3.4 and Tables 9 .4-1 & 9.4-9 detail the operation and some of the design basis for the ventilation system that serves the H&!! equipment room. No reference to the post-accident design basis room temperature was found in these sections . FSAR Section 3.11 and Tables 3_11-1

& 3.11-2 detail the expected environmental conditions that equipment will operate in during normal and post-accident operations . However, Table 3.11-1 lists all the expected room temperatures for normal and post-accident operation . Table 3.11-1, Sheet 2 of 8, Rooms 236, 297, 299 and 299A fist an accident temperature of 1040 F. The temperature far room 236 will need to be revised to 107°F and rooms 297 . 299 and 299A will need to be revised to 1213°F . Therefore, a 50.59 evaluation will be performed in Section IV.

This change does not involve a test or experiment and will not require that any component, system or groups of systems be operated in modes for which they were not previously analyzed .

LI-101-0'I, Rev . 8; Effective Date : 6123105

4. References piscuss the methodoiogy for performing t_8C3 searches . State the location of relevant licensing document infQrrnabon and explain the scope of the review such as electronic search criteria used (e

.g- key words) or the gensrai extent of manual searches. NOTE, Ensure that manual searches are performed using controlled copies of the documents. If you have any questions, contact your site licensing department.

Electronic search method used- Keywords-WF3 Autonomy-LRS Search- "h&v room", "h& equipment room", "hvac 50 .59-Search equipment room", "heating ventilation and air conditioning", "design space temperature",

`=environmental conditions", "ccw heat exchanger", "component cooling water heat exchanger", 1p4*F LBDs reviewed manually:

FSAR Sections 1 .7, 3 .2, 3.11, 6.4, 6.2, 7.3, 9 .4, 9 .5, 6.5, 9.2, 12 .3A, 15.(3 S. Is the validity of this Review dependent on any other change? 0 Yes No if "YES," list the required changes/submittals . The changes covered by this 50.59 Review cannot be implemented without approval of the other identified changes (e.g., license amendment request) . Establish an appropriate notification mechanism to ensure this action is completed.

E.l-101-0 1, Rev. S ; Effective Date : 6123/05

t3. ENVIRONMENTAL SCREENING If any of the following questions is answered "yes," an Environmental Review must be perforated in accordance with NMM Procedure V-115 and attached to this 50 .59 Review . Consider both routine and non-routine (emergency) discharges when answering these questions.

Will the proposed activity being evaluated :

YES NO T. L~ Involve a land disforhsnra Pgital to or in PxcPSs of one acre grading activities, construction of buildings, excavations, reforestation, creation or removal of ponds)?

2. © Involve any land disturbance of undisturbed land areas (i.e ., grading activities, construction, excavations, reforestation, creating, or removing goods)?

3. © 23 Involve dredging activities in a lake, river, pond, ditch, or stream?

- s s s . s .-s . s 5_ [] o increase the concentration or quantity of chemicals being discharged to the river, lake, or air?

6. li Discharge any new or different chemicals that are currently not authorized for use by the state regulatory agency?

7. El Z Change the d ign ur operefon of the intake or discharge structures?

8. © 0 Modify the design or operation of the cooling tower that will change water or air flow characteristics?

Modify the design or operation of the plant that will change the path of an existing water discharge or that will result in a new water discharge?

Modify existing stationary fuel burning equipment (i,e ., diesel fuel oil, butane, gasoline, propane, and kerosene)?'

Involve the installation of stationary fuel burning equipment or use of portawe fuel burning equipment (i.e., diesel fuel oil, butane, gasoline, propane, and kerosene)?'

Involve the installation or use of equipment that will result in a new or additional air emission discharge?

13, Involve the installation or modification of a stationary or mobile tank?'

14. Involve the use or storage of oils car chemicals that could be directly released into the environment?

Involve burial or placement of any solid wastes in the site area that may affect runoff, surface water, car groundwater?

Sew NMM Procp-dure eV .1'17 for guidance in answering this question .

LI-101-l31, Rev. 8; Effective Date: 61231t15

C. SECURITY PLAN SCREENING if any of the following questions answered "yes," a Security Plan Review must be performed by the Security Department to determine actual impact to the Plan and the need for a change to the Flan .

Could the proposed activity being evaluated :

YES N0 Add, delete, modify, or otherwise affect Security department responsibilities (e-g,,

inrrirtrtin fire hrir adr+/-, fra watch, nri t~nrgf"rnprl spar

rr~cr.a~ opprati

2. Result in a brew to any security barrier(s) (e .g., HVAC ductwork, fences, doors, walls, railings, floors, penetrations, and bailisfic barriers)?

3. Cause materials or equipment to be placed or installed within the Security Isolation Zone?

[1 Affect (block, move, or alter) security lighting by adding or deleting lights, structures, buildings, or temporary facilities?

5. Modify or otherwise affect the intrusion detection systems (e .g ., E-fields, microwave, fiber optics)?

6. 17 Modify or otherwise affect the operation or field of view of the security cameras?

7_ Modify or otherwise affect (block, move, or alter) installed access crintrol equipment, intrusion detection equipment, or other security equipment?

8 .. F Modify or otherwise affect primary or secondary power supplies to access control equipment, intrusion detection equipment, ether security equipment, or to the Central Atarm Station or the Secondary Alarm Station?

Mortify or otherwise affect the facility's security-related signogo or land vehicle barriers, including access roadways?

1 ¬i. [l Modify or otherwise affect the facility's telephone or security radio systems?

The Security Department answers the following question if one of questions CA through C.10 above was answered "yes_"

Is a change to the Security Plan required? [j' Yes Q No Attach to this $0 .69 Review or reference below documentation for accepting a "yes" answer for any of Questions C.1 through C.10, above.

Name of Security Plan reviewer (print t Signature f Data U-1Q't-C31, Rev . 8,, Effective Date : 6#23105

50 .59 REVIEW FORM Page 7 of 10 IV. 50.59 EVALUATION License Acne ent Determination Does the proposed Change being evaluated represent a change to a method of evaluation Yes ONLY? If "Yes," Questions I - 7 are not applicable; answer only Question 8. If "No," answer No low.

Does the proposed Change :

Rosolt in more thnn a minimal increase in the frequency of occurrence of an accident Yes previously evaluated in the FSAR? No BASIS :

The HVAC Equipment Room and CCW Heat Exchanger "B" Room located in the Reactor Auxiliary Building (RAB) contain systems and components that maintain proper environmental conditions for operating equipment and help mitigate an accident . FSAR Chapter 15 . Accident Analyses, was reviewed and it was determined that the Safety Systems and Structures (SSC) located in the HVAC Equipment Room and CCW Heat Exchanger "B" Room will not initiate any accident evaluated in the FSAR . The SSCs located in the rooms mitigate an accident and cannot initiate an accident previously evaluated in the FSAR .

Therefore, there is not more than a minimal increase in the frequency of occurrence of an accident as previously evaluated in the FSAR .

2. Result in more than a minimal increase in the likelihood of occurrence of a malfunction Yes of a structure, system, or component important to safety previously evaluated in the No FSAR?

BASIS.

The areas cooled by the Essential Chillers and Chilled Water (CHW) System contain safety related equipment that could potentially malfunction if a suitable ambient temperature is not maintained in those areas, The Essential Chillers and portions of the CHW System are located in the HVAC Equipment Room . The Component Cooling Water (CCW) System cools safety related equipment that could potentially malfunction if suitable cooling is not provided.

"S" The CCW Heat Exchanger in the room provides cooling for the CCW system. During normal operation the HVAC Equipment and CCW Heat Exchanger "B" rooms are maintained at or below 104'3F, which is the design basis room temperature during normal operations .

The subject FIR dries nntaffprt thase temperatures

.Therefore, the normally operating systems and components that are located in the HVAC Equipment and CCW` Heat Exchanger "B" rooms are not affected .

FSAR Section 3 .11 and Tables 3.119 & 3 .11-2 detail the expected environmental conditions that equipment will operate in during normal and post-accident operations . Table 3 .11-1 lists all the expected room temperatures for normal and post-accident operation. Table 3.3 1-1, 2 of 8, Rooms 236, 297, 299 and 299A lists an accident temperature of 104"F. The temperature for room 236 (CCW Heat Exchanger "B" Room) will need to be revised to 1070F and rooms 297 (HVAG Equipment Area), 299 (HVAG Room - S8V & CVAS Equipment Areas) and 299A (HVAC Room - Chiller & HVR Areas) will need to be revised to 12011F However, this will not change the environmental classification of the equipment located in the rooms, The equipment is currently classified as "Mid Environment" which is defined in NOECP-1 13, Rev. 1, EQ Determinations, as a temperature less than 1221F . In addition, the LI-I 01 -01, Rev. 8 ; Effective mate: 6123105

subject ER determined by a review of technical manuals and specifications that all the equipment in the rooms is rated to operate at or above 120°F and the efficiency of the Essential Chillers, CHW System and CCW Neat Exchanger would not be affected .

Therefore, the equipment located in the HVAC Equipment and CCW Heat Exchanger "B° rooms will not have more than a minimal increase in the likelihood of occurrence of a malfunction .

3. Result in more than a minimal increase in this consequences of an accident previously 0 Yes evaluated in the FSAR? M do The Shield Building Ventilation (SBV) System and the Controlled Ventilation Area System (CVAS) are located in the HVAC Equipment Room . These systems provide: a filtered and monitored release of potentially radioactive air . The Essential Chilled Water (CHW) System is also located in the HVAC Equipment Room . The CHW system provides cooling to rooms that contain safetyrelated equipment that mitigate an accident . The environmental classification of the equipment located in tho HVAC Equipment Room and CCW Heat Exchanger "B" Room will not be changed. The equipment is currently classified as "Mild Environment" which is defined in NOECP-113, Rev. 1, EQ Determinations, as a temperature less than 122°F . In addition, the subject ER determined that all the equipment in the rooms are rated to operate at 120OF and the efficiency of SBV & CVAS filter trains would not be affected. So, the magnitude of radioactive dose to the public would not be affected.

Therefore, the increase in the HVAC Equipment Room post-accident temperature will not cause more than a minimal increase in the consequences of an accident previously evaluated in the FSAR .

Result in more than a minimal increase in the consequences of a malfunction of a Yes structure, system, or component important to safety previously evaluated in the FSAR? No BASIS; The subject ER determined by a review of technical manuals and specifications that the operation of the equipment located in the HVAC Equipment and CCW Heat Exchanger "B" rooms will not be affected by the increase in the post-accident room temperature and the Essential Chillers, CC Heat Exchanger, SBV and CVAS systems will function as designed .

Therefore, there will not be more than a minimal increase in the consequences of a malfunction of this equipment .

Create a possibility for an accident of a different type than any previously evaluated in the FSAR?

BASIS :

The equipment located in the HVAC Equipment room does not have the potential to initiate an accident as discussed in question 1 . The change will not change the environmental classification of the equipment located in the HVAC Equipment room . The equipment is currently classified as "Mild Environment" which is defined in NOECP-113, Rev. 1, EGG Determinations, a s temperature less than 122°F . In addition, the subject ER determined that all the equipment in the room is rated to operate at 120°F, and the efficiency of the Essential Chillers, CC W Heat Exchanger, Chilled Water System and SBV & CVAS filter trains would not be affected . In addition, the extra heat load to the adjacent areas does not have an adverse impact can the equipment in the adjacent areas. FEAR Section 12.3A discusses the vital areas that would potentially require access following air accident and Table 12_3A-g lists LI-'t(34-tfl, Rev . 8; Effective Date; 6/23/05

50.59 REVIEW FORM all the areas requiring access following an accident . The HVAC Equipment roots and CCW Heat Exchanger rooms are not listed as areas that require acres post accident. Therefore.

the change does not create an accident of a different type than any previously evaluated in the FSAR .

6. Create a possibility for a malfunction of a structure, system, or component important to yes safety with a different result than any previously evaluated in the FSAR? No The change will not change the environmental classification of the equipment located in the HVAC Equipment room . The equipment is currently classified as "Mild Environment" which is defined in NOECP-113, Rev, 1, ECM Determinations, as a temperature less than 122°F. In addition, the subject ER determined that all the equipment in the room is rated to operate at 120°F, the efficiency of the Essential Chillers and SBV & CVAS filter trains would not be affected and the extra heat load to the adjacent areas does not have an adverse impact on the equipment in the adjacent areas. The Failure Mode and Effect Analysis for the Chilled Water System (FSAR Table 9.2-17), COW System (FSAR Table g.2-4), SBV System (FEAR Table 6.2-31), and the CVAS (FEAR Table 6 .5-3) were not impacted by the subject change.

Therefore, the change does not create a possibility for a malfunction of a structure, system, or component important to safety with a different result than any previously evaluated in the FSAR.

7. Result in a design basis limit for a fission product barrier as described ir1 the FSAR © Yes being exceeded or altered? No BASIS :

The Safety Injection (SI) System and Containment Spray (CS) System are supported by the Essential Chillers and CCW System. These systems mitigate an accident by cooling the reactor care cladding and the containment building. The Reactor Coolant System fission product barrier is not impacted . As discussed in question 2 above the environmental classification of the equipment located in the HVAC Equipment and CCW Heat Exchanger "B" rooms is currently classified as "Mild Environment" which will not be changed by increasing the room post-accident temperature. In addition, the subject ER determined that all the equipment in the rooms is rated to operate at or above 126°F and the efficiency of the Essential Chillers and CCW Heat Exchanger would not be affected . Therefore, the operation of the SI and CS systems would not be affected and the fission product barrier design basis limits will not be exceeded.

8. Result in a departure from a method of evaluation described In the FSAR used in Yes establishing the design bases or in the safety analyses? No BASIS :

The subject ER changes the post-accident room temperature for the HVAC Equ and CCW Heat Exchanger "B" rooms. HVAC calculations 3-G and 5- ¬; determined the equilibrium room temperatures in the rooms based on heat loads in the room and the current capacity of the ventilation system . The calculation used standard HVAC calculations and methodology which is the same methodology used in previous revisions . The methodology of calculating equilibrium room temperatures in HVAC calculations is not described in the FSAR.

Ll "101-01, Rev . 8; Effective Date : 6123105

Page 10 of 10 If any of the above questions is checked "YES," obtain NRG approval prior to implementing the change by initiating a change to the Operating License in accordance with NMM Procedure LI>>113 .

0't, Rev. 8; Effective Date: 6123105 Ld-f01-