ML13324A791

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Forwards Station Procedures for Program to Assure Proper Cooling for 4 Kv & 480-volt Rooms,Per Commitment to Complete Open Issues of Draft NUREG-0829, Integrated Plant Safety Assessment & SEP Topic IX-5, Ventilation Sys
ML13324A791
Person / Time
Site: San Onofre 
Issue date: 01/17/1986
From: Medford M
Southern California Edison Co
To: Lear G
Office of Nuclear Reactor Regulation
Shared Package
ML13324A792 List:
References
RTR-NUREG-0829, RTR-NUREG-829, TASK-09-05, TASK-9-5, TASK-RR NUDOCS 8601230343
Download: ML13324A791 (17)
v • d • e


Text

Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M. 0.

MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING (818) 302-1749 January 17, 1986 Director, Office of Nuclear Reactor Regulation Attention: G. E. Lear, Director PWR Project Directorate No. 1 U. S. Nuclear Regulatory Commission Washington, D.C.

20555 Gentlemen:

Subject:

Docket No. 50-206 SEP Topic IX-5, Ventilation Systems San Onofre Nuclear Generating Station Unit 1

Reference:

Letter, M. 0. Medford, SCE, to 3. A. Zwolinski, NRC, Commitments to Complete Open Issues of Draft NUREG-0829, Integrated Plant Safety Assessment, October 4, 1985 The referenced letter indicated that SCE would provide the details of our temperature monitoring program for the 4 kV and 480V rooms.

These details are necessary to enable the NRC staff to perform a confirmatory review of this program in order to close out their review of the subject SEP Topic.

Accordingly, enclosed find the station procedures that implement the program to assure proper cooling for the 4 kV and 480V rooms.

The procedures are entitled S01-7-21, "480V and 4 kV Room HVAC System Operation" and S01-2.4-5, "Loss of 480 Volt/4 kV Room HVAC."

This program includes the monitoring of HVAC system operation, the monitoring of the temperature in these rooms and appropriate response actions in the event that room cooling is lost.

If you have any questions, please let me know.

Very truly yours, Enclosures 8601230343 860117 PDR ADOCK 05000206 P

PDR

REFERENCE:

S0123-VI-1.0.1 W

T r O

NCODE AC10AC (WHEN FORM FILLED OUT)

FINAL APPROVAL/DISAPPROVAL/CANCELLATION ROUTING FOR ISSUED TEMPORARY CHANGE NOTICE(S)

TCN NO.

(-

0 SITE DOCUMENT NO.

REV. NO. &

ISSUANCE DATE:

OARCANCELLATION ORIGINATOR (1)(B) k

,'4+/-

PRINT NAME PAX DATE ROUTED:

3

//2/&,

  • DATE DUE:
  • Technical Specification Violation if not completed within 14 days from date of issuance.

ROUTING DATE / INITIAL SEQUENCE ADDRESSEE/ORG.

ACTION REQUESTED APPROVED DISAPPROVED (1)(A)

I Review & Approve 2

Review & Approve E

nu 3

Review & Approve 2Y 4

Review & Approve (ir 5

Review & Approve c COPy 6

Site Procedures Group (SPG)

Forward to CDM (1)Reason for (A) o Disapproval/Disapproved By:

(Print_______Pax:

(B)-* Cancellation (Print Name)

If TCN i disapproved, return directly to the Site Procedures Group DESIGNEE:

5/

PRINT NAME EVALUATION OF THE USE OF AN ISSUED TCN INCLUDING THE EFFECT(S)

AS A RESULT OF DISAPPROVAL/CANCELLATION (USE REVERSE SIDE, IF REQUIRED).

VALUATION SUPPORTS DISAPPROVA NCELLATIO TCN? YES >

NO NCR REQUIRED TO DISPOSIT-ION EQUIP ERUN TEST? YES NO NCR No.

REINSTATE SUPERSEDED/INCORPORATED TCNS LISTED ON SO(123) 110 FORM?

YES NO REINSTATE DOCUMENT REVISION?

S

<, N O

PREPARED BY:

CFDMZ-esignee Date REVIEW OF EVALUATION and TCN DISPOSITION:

o DISAPPROVED APPROVED BY:

W.C 7W7cnaz~L.

Functional Dvision Manager Date Nr CANCELLED APPROVED Y:

Qual ity Assurance Date ORIGINAL FORWARDED TO CDM:

PERFORMED BY:

SPG t

COPY FORWARDED TO THE NUCLEAR SAFETY GROUP:

(S023 and S0123 series only)

PERFORMED BY:

SU(-,)

CM 06f'ate

REFERENCE:

S0123-VI-1.0.1 CODE AC10AC SO (WHEN FORM FILLD )U)

TEMPORARY CHANGE NOTICE Page 1 of TECHNICAL SPECIFICATION VIOLATION IF NOT COMPLETED WITHIN 14 DAYS TCN No.

(F CDM u~e only)

Site Document No.

-So/- 7-JI Revision No.

0 SINGLE USE TCN YES NO Site Document Title O 6;,L 14J) k V A.

IVLl,4fe S 5T6,qA 4 7 -,-J

1. PREPARED BY:

Ey'A D S PAX: j Sb ORGANIZATION: _

I_

Originator

2. DATE/TIME ORIGINATED:

_____/

_____3.

ISSUAN (COM USE ONLY)

4. SINGLE USE TCN cancels on:

(COM USE ONLY)

5. If required, TCN Deviation Approval:

CFDM (or designee):

A__

Signature/If by telecon print name and so state Date/Time

6. Check appropriate box:

Entire Document Attached 11 Affected Page(s) Attached Superseded/Incorporated TEN(s):

A)2A)/&7 (Not applicable No. (if none, so state)

A E USE TCNs)

7. This change cannot wait until the next revision of the Site Document and is required:

CDM A.

To implement facility design change (PFC, NCR, TFM, etc.)

APR 1 e1 Facility design change identifier

/

d TE Indicate PFC, NCR, TFM etc..

Identifier ICj5 Implementation of the facility design change has been determined. YES NO P y (If NO, a TCN cannot be approved until the facility design change has bein-implemen 8.-

Other (e.g., CAR, Licensing Commitments)

Specific Reason:

?

la, e

t'_b e

P-r 4 t '0 t se reverse side, iT required)

(

Et

8.

Is the document being TCN'd QA Affecting? YES NO (If YES, complete the boxes

) (If NO, see below.

(This is indicated on the Table of Contents pageof the-ite DEument. If not indicated, treat as QA Affectinc.)

A.

Does this change affect FSAR or Tech.

Spec. commitments?

YES NO,

B.

Does this change affect the nonradiological environment of any otfTsite area previously undisturbed during site oreparation and plant construction?

YES NO C.

Is the intent of the original document altered?

YES NO07 I

0.

Is the document to be changed an Emergency Operating Instruction?

T=Y NO /'

E.

Does this change pose an unreviewed safety question per 10 CFR 50.59, i.e., Ooes it increase the probability of occurrence or the consequences of an accident; create the possibility of a different accident; or reduce the Tech. Spec. margin of safety? YES NO (IF THE ANSWER TO A, B, C, D or E IS YTS A TC 5 NOT AUTHORIZED.)

9. Does this change affect licensing commitment requirements? YES NO
10. Copy forwarded to the Nuclear Safety Group.

PERFORMED BY:

Date:

(502/3 & 123 QA Affecting TCNs only)

11. The entire document was reviewed in conjunction with this TCN.

REVIEWED AND APPROVED BY:

/(_

CFDF Designee Uate

11. SIGNATURES REQUIRED:

I INITIAL APPROVAL R

ND APPR (AT LEAST ONE (1) SRO THE UNIT AFFECTED) ime Plant Management Staff -

Units 2 Date Time; Could this TCN affect or does it represent a change to a plant Could this TCN affect or does it represent a chance to e

i ro NO a plant operation in progress?

YES-NO 777/-

)~

Date Time SRO - Units 2&3 Date Jine I

FINAL APPROVAL REVIEWED AND APPROVED BY:

I 5)

C\\n C--

P S;- o

-t Cognizant Functional UiviT Manager Date Qu iay Assurance - Units 1, 2 and 3 ate I

If a document is Not QA Affecting, obtain initial approval from the Cognizant Supervisor(s) on the affected Unit(s) asions on Plant Management Staff line(s) and final approval fromr the CFD prior to subrr.ittal to CaM.

No other signatures are required.

I If QA Affecting, approval shall be by two members of the Plant Management Staff knowledgeable in tne areas affected, at least one of whom holds an SO License on the unit or units affected.

(For TCN approval, members of the Plant Management Staff are defined as the supervisor in charge of the shift, or as desionated in writing by the CFDM, exercising responsibility in the specific area and unit(s) addressed by the change.)

If YES, the Shift Superintendent shall provide the required SRO aporoval.

SO(12 ) 110, REV. 10 02-21-85 0067P (72 730

IMCLEAR SENRATION SIT DPERATING INSTRUCTION 301-7-21 WIT I SECONDARY PLANT EFFECTIVE DATE I)T 17384 REVISION 0 PAGE I OF 7 480 VOLT AND 4 kV ROOM HVAC SYSTEM OPERATION TABLE OF CONTENTS SECTION PAGE 1.0 OBJECTIVE 2

2.0 REFERENCES

RECEIVED COM 2

3.0 PREREQUISITES OCT17 1984 2

4.0 PRECAUTIONS SITE FILE COPY 2

5.0 CHECKLIST 2

6.0 INSTRUCTIONS 2

7.0 RECORDS 5

ATTACHMENTS I

Checklist 1, 480 V/4 kV Air Conditioning Electrical Alignment 6

QA PROGRAM AFFECTING 08259

NUCLEAR GENERATION SITE OPERATING INSTRUCTION S01-7-21 UNIT 1 SECONDARY PLANT REVISION 0 PAGE 2 OF 7 480 VOLT AND 4 kV ROOM HVAC SYSTEM OPERATION

  • t 1.0 OBJECTIVE 1.1 To provide guidance in the operation of the air conditioning units for t-he 480 Volt and 4 kV Rooms.

1.2 To provide guidance in the operation of the installed back-up ventilation fans for the 480 Volt and 4 kV Rooms.

1.3 To provide guidance in monitoring for proper operation of the 480 V and 4 kV Room air conditioning and ventilation equipment.

2.0 REFERENCES

2.1 Operating Instruction 2.1.1 SO1-2.4-5, Loss of 480 Volt/4 kV Room HVAC 3.0 PREREQUISITES 3.1 Prior to use of an uncontrolled (pink) copy of this Station Document to perform work, verify that it is current by checking a controlled copy and any TCNs or by use of the method described in S0123-VI-0. 9.

4.0 PRECAUTIONS 4.1 Manual override switches, HS-322 and HS-323, should be maintained in the NORMAL position. This is to prevent inadvertantly overriding the trip signal to the units upon detection of a fire in the 480 Volt or 4 kV Rooms.

4.2 If 480 Volt or 4 kV room temperatures cannot be maintained within the limits specified in this instruction, go to SO1-2.4-5, Loss of 480 Volt/4 kV Room HVAC.

4.3 In the event of a fire, portable exhaust fans should be used to ventilate smoke from the 480 Volt or 4 kV Rooms not the air conditioning units.

(Ref. 2.1.1) 5.0 CHECKLIST 5.1 Checklist 1, 480 V/4 kV Air Conditioning Electrical Alignment 6.0 INSTRUCTIONS 6.1 Placing the 480 V/4 kV Room Air Conditioning in Service 6.1.1 Perform Checklist 1, 480 V/4 kV Air Conditioning Electrical Alignment, for either or both rooms as required.

NUCLEAR GENERATION SITE OPERATING INSTRUCTION 501-7-21 UNIT 1 SECONDARY PLANT REVISION 0 PAGE 3 OF 7 6.0 INSTRUCTIONS (Continued)

NOTE:

Both room air conditioners cycle on and off via thermostats. TSH-102 controls the 480V Room unit and TSH-104 controls the 4 kV Room unit.

6.1.2 Verify that the air conditioning units start and supply cooling to their respective rooms.

6.2 Removing the 480 V/4 kV Room Air Conditioning from Service 6.2.1 The 480 V and/or 4 kV Room air conditioning equipment may be removed from service by opening individual breakers in panel B-25 located on the mezzanine level of the 480V Room.

6.3 Manual Override of the 480V/4 kV Room Air Conditioning NOTE:

The air conditioning units receive a trip signal from smoke detectors in their associated switchgear Room.

CAUTION The air conditioning units are not to

-be operated for the purpose of clearing the smoke, due to fires, from the switchgear rooms.

6.3.1 To clear smoke from the switchgear rooms, refer to S01-2.4-5, Loss of 480 Volt/4 kV Rooms HVAC.

6.3.2 The air conditioning units may be restarted, in the event of a false fire alarm, with the approval of the SRO Operations Supervisor by:

.1 Placing the override switch of the desired unit in the OVERRIDE position.

NOTE:

The 480 V air conditioning unit override switch is mounted on the wall beside the 480 V Room Halon Control Panel.

NOTE:

The 4 kV air conditioning unit override switch is mounted on the wall beside the 4 kV Room Halon Control Panel.

NUCLEAR GENERATION SITE 0 OPERATING INSTRUCTION S01-7-21 UN.IT I SECONDARY PLANT REVISION 0 PAGE 4 OF 7 6.0 INSTRUCTIONS (Continued)

T

.. L 6.4 Backup Fan Operation 64 r.

l

.//omu NOTE:

Backup fans are provided to deliver outside air to the 480 V and 4 kV Rooms in the event of an air conditioning failure. Fans are controlled with local pushbuttons.

6.4.1 Placing the 480 V Room Backup Fans in Operation

.1 OPEN D/S-A-100, 480 V Room Air Conditioning Unit Safety Switch, to stop the 480 V Room Air Conditioning Unit.

.2 CLOSE MVS-340, A-100 Discharge Damper.

.3 CLOSE MVS-349, A-100 Return Damper.

.4 OPEN MVS-347, A-902 Discharge Damper.

.5 OPEN MVS-350, A-900 Suction Damper.

.6 START A-902 and A-900, 480 V Room Supply and Exhaust Backup Fans.

6.4.2 Securing the 480 V Room Backup Fan Operation

.1 STOP A-900 and A-902, 480 V Room Exhaust and Supply

'fA Backup Fans.

.2 CLOSE MVS-350, A-900 Suction Damper.

.3 CLOSE MVS-347, A-902 Discharge Damper.

.4 OPEN MVS-349, A-100 Return Damper.

.5 OPEN MVS-340, A-100 Discharge Damper.

.6 If the 480 VRoom Air Conditioning Unit is to be placed in service, then CLOSE D/S-A-100, 480 V Room Air Conditioning Unit Safety Switch.

6.4.3 Placing the 4 kV Room Backup Fans in Operation

.1 OPEN D/S-A-101, 4 kV Room Air Conditioning Unit Safety Switch, to stop the 4 kV Room Air Conditioning Unit.

.2 CLOSE MVS-332, A-101 Discharge Damper.

.3 CLOSE MVS-330, A-101 Return Damper.

.4 OPEN MVS-333, A-903 Discharge Damper.

.5 OPEN MVS-331, A-901 Suction Damper.

.6 START A-903 and A-901, 4 kV Room Supply and Exhaust Backup Fans.

NUCLEAR GENERATION SITE U

R G SOPERATING INSTRUCTION 501-7-21 UNIT 1 SECONDARY PLANT REVISION 0 PAGE 4AOF 7 6.0 INSTRUCTIONS (Continued)

.L 6.4.4 Securing the 4 kV Room Backup Fan Operation

.1 STOP A-901 and A-903, 4 kV Room Exhaust and Supply Backup Fans.

.2 CLOSE MVS-331, A-901 Suction Damper.

.3 CLOSE MVS-333, A-903 Discharge Damper.

.4 OPEN MVS-330, A-101 Return Damper.

.5 OPEN MVS-332, A-101 Discharge Damper.

.6 If the 4 kV Room Air Conditioning Unit is to be placed in service, then CLOSE D/S-A-101, 4 kV Room Air Conditioning Unit Safety Switch.

NOTE:

The back-up fans receive a trip signal from smoke detectors in their associated switchgear Room. This trip signal cannot be overridden.

6.5 Monitoring HVAC Operation NOTE:

The HVAC System is designed to supply 65F air to the 480 V and 4160 V switchgear Rooms in a manner sufficient to maintain an ambient temperature no greater than 950F. Also, ducting is provided to maintain a temperature of 770F or lower in the area of the Elgar Inverter.

6.5.1 Record on Part J of SO(1)-24 the air temperature in the following locations in 4 kV and 480V switchgear rooms once per day on day shift (preferably afternoon) in Modes 1-6.

.1 4 kV room -

by the double doors at the southeast corner of the room at grade;

.2 4 kV room - in the northwest corner at grade;

.3 480V ro

- by the double doors at the southeast corner of the r~or at grade;

.4

430, room - in the northeast corner at grade;

.5 480V room - in the center of the west side of the platform at elevation 20'.

NUCLEAR GENERATIONSITE OPERATING INSTRUCTION SOI-7-21 UNIT I SECONDARY PLANT REVISION 0 PAGE 5 OF 7 6.0 INSTRUCTIONS (Continued) 6.5.2 Ensure the following temperatures are maintained:

CAUTION If temperatures cannot be maintained within limits go to 501-2.4-5, loss of 480 Volt/4 kV Room HVAC.

.1 Switchgear Room ambient temperature < 95cF;

.2 Elgar Inverter ambient temperature < 770F.

6.5.3 Once per shift verify proper operating mode of the HVAC System in each room.

.1 Air conditioning units operating.

.2 Backup fans not operating.

7.0 RECORDS 7.1 Checklist 1, when completed, shall be filed in the Nonsafety Related Systems Alignment file.

The preceding Checklist may be removed and discarded.

JWReynolds:oB25g

NUCLEAR GENERATION SITE OPERATING INSTRUCTION S01-7-21 UNIT 1 SECONDARY PLANT REVISION 0 PAGE 6 OF 7 ATTACHMENT 1 CHECKLIST 1 480V/4kV AIR CONDITIONING ELECTRICAL ALIGNMENT 1.0 PREREQUISITES INITIALS 1.1 Obtain the SRO Operations Supervisor's approval to perform this Checklist.

SRO Ops.

Supv.

1.2 All personnel performing this Checklist have been advised to note all missing, incorrect or deteriorated component ID tags in the "Comments" section of this Checklist.

1.3 Equipment is not required to be aligned in numerical sequence.

1.4 Deviations from indicated component positions are allowed by approval of the SRO Operations Supervisor. Deviated positions will be indicated by circling the indicated position, writing the deviated position above, and initialing of each deviated entry by the SRO Operations Supervisor.

2.0 INSTRUCTIONS 2.1 480 V Room BKR BKR ALIGN NUMBER DESCRIPTION POSITION INITIALS 2.1.1 52-1306 Power Supply to HVAC Panel B-25 CLOSED 2.2 480V Room Mezzanine Level 2.2.1 8-2501 480 V Room Air Conditioning CLOSED Unit Power Supply 2.2.2 8-2502 4 kV Room Air Conditioning CLOSED Unit Power Supply 2.2.3 8-2507 4 kV Room Ventilation Supply CLOSED Fan Power Supply 2.2.4 8-2508 480 V Room Ventilation Supply CLOSED Fan Power Supply 2.2.5 8-2513 4 kV Room Ventilation CLOSED Exhaust Fan Power Supply 2.2.6 8-2514 480 V Room Ventilation CLOSED Exhaust Fan Power Supply ATTACHMENT 1 PAGE 1 OF 2

NUCLEAR GENERATION SITE OPERATING INSTRUCTION 501-7-21 UNIT 1 SECONDARY PLANT REVISION 0 PAGE 7 OF 7 ATTACHMENT 1 CHECKLIST 1

%23...Q 2.0 INSTRUCTIONS (Continued)

BKR BKR ALIGN NUMBER DESCRIPTION POSITION INITIALS 2.3 West Heater Deck 2.3.1 C/S-A-900 480 V Room Ventilation CLOSED Exhaust Fan Safety Switch 2.3.2 C/S-A-902 480 V Room Ventilation CLOSED Supply Fan Safety Switch 2.3.3 D/S-A-100 480 V Room Air Conditioning CLOSED Unit Safety Switch 2.4 4kV Halon Panel Area 2.4.1 C/S-A-901 4 kV Room Ventilation CLOSED Exhaust Fan Safety Switch 2.4.2 C/S-A-903 4 kV Room Ventilation CLOSED Supply Fan Safety Switch 2.5 Control Building Roof 2.5.1 D/S-A-101 4 kV Room Air Conditioning CLOSED Unit Safety Switch COMMENTS:

PERFORMED BY:

Operator Signature Initials Date Operator Signature Initials Date REVIEWED BY:

SRO Operations Supervisor Date 0825g ATTACHMENT 1 PAGE 2 OF 2

REERNC:S023V 0..1 4NCODE ACIOAC

REFERENCE:

SOI23-VI-1.0.1 "A

r-so I

Sr(WHEN FORM FILLED OUT)

FINAL APPROVAL/DISAPPROVAL/CANCELLATION ROUTING FOR ISSUED TEMPORARY CHANGE NOTICE(S)

TCN NO.

SITE DOCUMENT NO. 512/-2, REV. NO.

ISSUANCE DATE:

CANCELLATION ORIGINATOR (1)(B)

PRINT NAME PAX DATE ROUTED:

/2

  • DATE DUE:
  • Technical Specification Vidlation if not completed within 14 days from date of issuance.

ROUTING D

INITIAL SE UENCE ADDRESSEE/ORG.

ACTION REQUESTED IAP3ED DISAPPROVED 1)A 3_

Review &Approve 1Di 5Review

& Approve____

(1)Reason for.(A) o Disapproval/Disapproved By: ______________Pax: ____(B) )k Cancellation 7fo

.5tj/944-71 rk"40L19/

10,7r" r);C,< 1 / 5--/2 4 /

If TCN is-dispprved., return directly to the Site Procedures Group DESIGNEE:

A A

/ 1 D

/ INITIAL PRINT NAME/

EVALUATION OF THE USE OF AN ISSUED TCN INCLUDING THE EFFECT(S) AS A RESULT OF DISAPPROVAL/CANCELLATION (USE REVERSE SIDE, IF REQUIRED).

VALUATION SUPPORTS DISAPPROVAAIO ES O

CR REQUIRED TO DISPOSIT-I-ON EQIUPENOWRERUN TEST? YES ___NO NCR No.

REINSTATE SUPERSEDED/INCORPORATED TCNS LISTED ON SO(123) 110 FORM?

YES

'k NO __

REINSTATE DOCUMENT RVSO YE kNO PREPARED BY:

2__________

3 k(-S CRe /D&Asipnee Date REVIEW OF EVALUATION and TCN DISPOSITION:

o DISAPPROVED APPROVED BY:

'Me fl7-,a/=

Functional D'on Manager ate

~1 CANCELLED APPROVED BY:__________

Quality AP durance Date ORIGINAL FORWARDED TO CDM:

PERFORMED BY:sapoa/sapoeByPa:())Cnlatn SP Date COPY FORWARDED TO THE NUCLEAR SAFETY GROUP:

(S023 and S0123 series only)

PERFORMED BY:

1 FOMYS N

COM C

_Df REVIW OFEVAUATIN ad TC DIPOSIION

REFERENCE:

50123-VI-1.0.1 SO

u.

Atu TEMPORARY CHANGE NOTICE TECHNICAL SPECIFICATION VIOLATION IF NOT COMPLETED WITHIN 14 DAYS Site Document No.

Revision No.

n T

N O Site Docmnt Title

.i an#

A C

(

use only)

1.

PREPARED BY:

I110 L 0Of PAX:

T ORGANIZATON:

6 f

Driginator

2.

DATE/TIE MIINATED:

0

3. ISSUANCE DATE: DEC 8 1984 (OW oNn
4.

If required. TCK Deviation Approval:

CFDM (or designee):

,J_

Signature/if by telecon print name and so state Date/lime Thm aprpratebo: -

ntir Document )ched flAffected Page(s) Attached S.

His ckage camot aft until the next revision of the Site Document and is required:

DEC 1 0 L

'To Implemnt facility design change IPFC, NCR. TFN, etc.)

Facility desigp change identifier Indicate PFC, NCR, TFN etc.

Identifier SITE FILE COPY Implementation of the facility desi n change has been detenined.

YES No (If m, a TEM canmot be approved unt 1 the facility design change has beiijTiplemenlTiT Other (e.g..

CA.

Licensing Commitments)

Specific Reason:

4"1

-C0A'A

-titqi4 eUAA,~j AJJQ 44&-

M/di-A

'7ZAA 6j 4 fuse reverse side, it required)

7.

Is the document being TCN'd QA Affecting? YES Z 10 (If YES, complete the boxes below.) (If NO, see

  • below.)

(This is Indicated on the Table of Contents page of theTite Document.

If not indicated, treat as QA Affecting.)

I A.

Does this change affect.FAR or Tech. Spec. comitments?

YES NOV t

I I

a.

Does this change affect the nonradiological environment of any oTFsTte a prev ously undisturbed j

during site preparation and plant construction?

YES No

(

C.

1s the intent of the original'document altered?

YES _0 I

8.

- Is the document to be changed an Emergency Operating InstFrcTion?

'TEf No

1.

Does this change pose an unreviewed safety question per 10 CFR 50.59. i.e.7aos it increase the I

prohability of occurrence or the consequences of an accident; create t possibility of a different accident; or reduce the Tech. Spec. margin of safety? YES No 17F THE ANSWER TO A, S.C. 0 or E IS YTEC A TClTS NOT AUTHORIZED.)

L Does this change affect licensing commitment requirements?

YES _

0_

NO I

9.

Copy forwarded to the Nuclear Safety Group.

PERFORMED BY:

Date:

(QA Affecting TCNs only)

(CON)

10.

The entire docsumet ae reviewed is conjunction with this TCN.

REVIEWED AND APPROVED BY:

Uum or Designee

11.

SIGATURES REUIRED*

r 1 S

TINITIAL APPROVAL aEnVED (AT LEAST ONE (1) SRO ON THE UNIT AFFECTED) a-nagdent ft-Unit I aite Time Plant Management Staff - Units 2A3 Date Tim I I

Could this T affect or does it represent a chap to a plant Could this TCN affect or does it represent a change to I

operation in 5s?

a plant operation in progress? YES***

No 4)5RUO UDate 11mi FINAL APPROVAL I REVISXE AND ~PUYD BUY:

I tognizant Functional Divist neger Date aity Assu Units ad a Date If a document is Not QA Affecting, obtain initial approval from the Cognizant Supervisor(s) on the affected Unit(s) [signs on Plant Management Staff line(s)] and final approval from the CFOM prior to subittal to CDN.

ab other signatures are required.

'f QA AF:Ing, app-vc!

all be by two. members of the Plant Management Staff knowledgeable in the areas

?Leted,.

'ea~t 0.

holds an SRO License on the unit or units affected.

(For TCN approval, members o the Plant 4ronag

  • 0.

<ri defined as the ;upervisor in charge of the shift, or as designated in writing by tL' CF"P 'ee:ist..g r 4 *ibility in the specific area and unit(s) addressed by the change.)

If -1, i'

~ n.4 reri..irandant shall provide the requi.ed SO approval.

0067f

NUCLEAR GENERATJ UNIT I DPERATTPcIN EFFECTIVE DATE ABNORMAL REVISION 0 K

PAGE 2 OF 4 MEd 0F' LOSS OF 480 VOLT/4kV ROOMS NVAC TABLE OF SECTION

.PAGE 2.0 SYMPTDMS 2.0 ATDATCoACTIONS cry

3.

IMMEDIATE OPERATOR TION(

OCT CDI 2

4.0 SUBSEQUENT ACTIONS

.4 I2 5.0 ATACHMENTS O.

4 6.0 REFERENCE 4

4 7.0 RECoRD(S) 4 4

W7it A PROGRAM AFFECTING

NUCLEAR GENERATION SITE OPERATING INSTRUCTION 501-2.4-5

~T 1 -ABNORMAL REVISION 0 PAGE 2 OF 4 LOSS OF 480 VOLT/4kV ROOMS HVAC DA 3.0 SYMPTOMS 1.3 480 Volt HVAC-Trou kr DOF-ln~lomanpp-

.~

1.2 4WV HVAC Trouble alarm (1000F ambient room temperature).

1.3 Increasing temperatures in 480 Volt or 4kV Room.

1.4 480 Volt and/or 4kV Room air conditioning equipment or backup fans not operating (local observation).

1.5 Fire in 480 Volt and/or 4kV room.

2.0 AUTOMATIC ACTIONS 2.1 The 480 Volt Room air conditioning unit and backup fans will trip upon actuation of 480 Volt room smoke detectors or closure of the 480 Volt room smoke dampers.

2.2 The 4kV Room air conditioning unit and back-up fans will trip upon actuation of 4kV room smoke detectors or closure of the 4kV room smoke dampers.

3.0 IMMEDIATE OPERATOR ACTION(S) 3.1 None 4.0 SUBSEQUENT ACTIONS 4.1 If an air conditioning unit has tripped due to actuation of a smoke detector or damper due to a fire, portable exhaust fans should be used to ventilate smoke from the room, not the air conditioning units.

CAUTION The SRD Operations Supervisor's approval shall be obtained prior to using the OVERRIDE switches to restart the 4kV or 480 Volt Room air conditioning units.

4.2 If an air conditioning unit has tripped due to actuation of a false smoke detector or damper signal, the unit may be restarted as follows:

NOTE:

Monitor the 480 V and 4kV room temperature per step 4.5 ihile performing the following steps to establish adequate cooling.

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ENERATION SITE OPERATING INSTRUCTION ABNORMAL REVISION 0 PAGE 3 OF 4 4.0 SUBSEQUENT ACTIONS (Continued) 4.2.1 Obtain SRO Operations Supervisor's approval to operate the OVERRIDE switch.

4.2.2 Place the override switch in the OVERRIDE position.

4.2.3 Verify that the air conditioning unit starts.

4.3 If an air conditioning unit fails mechanically or electrically, restore ventilation as follows:

4.3.1 Place the installed backup supply and exhaust fans in service, by depressing their respective start pushbutton.

NOTE:

The 480 V room backup fan controls are located on the West Heater Deck. The 4kV room backup fan controls are located on the Control Building roof.

4.4 If the backup fans are not available and the air conditioning unit(s) remain inoperable; NOTE:

Security should be notified if the 4kV room security door will be open.

4.4.1 OPEN the doors to the affected room.

NOTE:

If all lights are turned off the ambient toom temperature should remain < 1040F.

44.

Reduce lighting in the affected room as low as possible.

4.5 Monitor and compare the affected switchgear room(s) ambient temperatures to the following limits:

Allowable Daily Maximum Areas Rated Ambient Allowable Ambient Monitored Temperature Temperature Elgar Inverter

< 104*F 1220F Power Cables

< 104 0F 140OF (in trays)

Other Equipment

< 1040F 122*F

LICAR Ty0N SITE OPERATING INSTRUCTION S01-2.4-5 j.ITABNORMAL REVISION 0 PAGE 4 OF 4 4.0 SUBSEQUENT ACTION (Continued) 4.5.1 If the ambient temperature exceeds the Allowable Daily Rated Value(s), initiate steps to reduce the ambient temperature. (Provide auxiliary cooling, reduce plant load----rduce--

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.1 Record Elgar Inverter area temperatures hourly, if Elgar Inveter temperatures exceed 104 0F.

NOTE:

.One significant ambient temperature excursion (4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />) above the allowable daily rated values, but below the Maximum

- Allowable Ambient Values, is permitted in any 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period.

4.5.2 If the ambient temperature exceeds the Allowable Daily Rated Value(s) for greater than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or if the ambient temperature exceeds the Maximum Allowable Value(s), the Elgar inverter, power cables and other equipment within that room shall be considered inoperable and the Unit shall be shutdown in accordance with applicable Tech. Spec.,requirements. In all cases, this would require a shutdown in accordance with Tech. Spec. 3.0.

4.6 Determine if this event is classified as an emergency per SOI-VIII-1, Recognition and Classification of Emergencies. If this event is not so classified, notification shall be made in accordance with SO1-14-13, Notification and Reporting of Significant Events.

5.0 ATTACHMENT(5) 5.1 None 6.0 REFERENCE 6.1 Letter to H. B. Ray from D. K. Nelson, dated June 18, 1982, concerning 480V/4kV Room Ambient Temperature Operating Criteria.

7r0 RECORD(S) 7.1 None JWReynolds :0827g eI

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