Text

Revision 04 to Procedureinternal Flooding, RA-EP-2880
	ML16131A670
Person / Time
Site:	Davis Besse
Issue date:	04/30/2016
From:	Tyrie R; FirstEnergy Nuclear Operating Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	RA-EP-2880, Rev 04
	Download: ML16131A670 (18)
	v • d • e

FE NOC Data Date Time: 04/30/2016 08:59:20 AM D Davis-Besse Power Station Transmittal Report Page 1of1 Copy Holder Number: 1665 Name: DOC. CONTROL DESK Location / Address: OFFSITE / USNRC DMSION OF EMERGENCY PREPAREDNESS One White Flint North Transmittal Number: DB-o4302016-252834 Transmittal Date: 4/30/2016 7:52:35 AM 11555 Rockville Pike Rockville, Maryland 20852-2738 Unit Document Number Doc Type Sheet/Section Revision Version Change Type Change Number Document Status HC AC CD TOCl TOC2 Changes DBl RA-EP-02880 PROC 00~ APPROVED 0 0 EPON DBl RA-EP-02880 PROC 0003 REVISED 0 0 EPON Use this document transmittal to update the identified documents and remove the superseded documents from use.

\

Page 1of17 Davis-Besse Nuclear Power Station PROCEDURE RA-EP-02880 INTERNAL FLOODING REVISION04 Prepared by: Ron Tyrie Procedure OW11er: Superintendent - Nuclear Operations Effective Date: 04/30/16

~~~~~~~~~~

LEVEL OF USE:

STEP-BY-STEP

2 RA-EP-02880 Revision 04 INTERNAL FLOODING TABLE OF CONTENTS 1.0 PURPOSE ..................................................................................................................................... 3

2.0 REFERENCES

......................"........................................................................................................ 3 3.0 DEFINITIONS .............................................................................................................................. 3 4.0 RESPONSIBILITIES .................................................................................................................... 3 5.0 INITIATING CONDITIONS ........................................................................................................ 3 6.0 PROCEDURE ............................................................................................................................... 4 6.1 Flooding in Areas that Affect Safe Shutdown Systems ..... :............................................ .4 6.2 Flooding in the Emergency Feedwater Facility .............................................................. .4 6.3 Flooding in All Other areas .............................................................................................. 4 6.3 Cleanup of the Affected Areas ......................................................................................... 5 6.4 Equipment restoration ...................................................................................................... 5 7.0 FINAL CONDITIONS .................. ;............................................................................................... 6 8.0 RECORDS .................................................................................................................................... 6 ATTACHMENT 1: FLOODING AFFECTING THE SERVICE WATER PUMP ROOM ............... 7 ATTACHMENT 2: FLOODING AFFECTING THE CCW PUMP ROOM ...................................... 10 ATTACHMENT 3: FLOODING AFFECTING THE ECCS ROOMS .............................................. 12 ATTACHMENT 4: POTENTIAL SOURCES OF INTERNAL FLOODING ................................... 14 ATTACHMENT 5: PIPE TUNNEL DRAINS ARRANGEMENT .................................................... 15 ATTACHMENT 6: FLOODING AFFECTING THE EFWF ............................................................. 16

3

RA-EP-02880 Revision 04 1.0 PURPOSE This procedure provides guidance for actions to be taken for internal flooding incidents.

2.0 REFERENCES

/

2.1 Developmental 2.1.1 Assessment of the Internal Flood Hazard for the Davis-Besse Nuclear Power Station, SAROS, September 1989.

2.1.,2 INPO SOER 85-5, Internal Flooding of Power Plant Buildings, December 30, 1985.

2.1.3 ECP 13-0195, Emergency Feedwater Facility 2.1.:4 ECP 13-0196, Emergency Feedwater System 2.2 Implementation 2.2.1 RA-EP-01500, Emergency Classification 2.2.2 RA-EP-02720, Recovery Organization 2.2.3 NOP-SS-3300, FirstEnergy Enterprise Records Management Program 2.2.4 NORM-LP-7202, Davis-Besse Specifications for FLEX Equipment Out of Service 3.0 DEFINITIONS 3.1 INTERNAL FLOODING- Flooding that occurs from breaches of water systems that are located inside plant buildings and are connected to large water sources such as Intake Forebay or tanks.

4.0 RESPONSIBILITIES 4.1 The Shift Manager shall implement this procedure in the event of internal flooding that constitutes a threat to:

Personnel Safety

Safe Shutdown capability

Power production capability

Diverse And Flexible Coping Strategies capability (FLEX I EFW) 5.0 INITIATING CONDITIONS This procedure shall be implemented upon Control Room identification of internal flooding incidents that exceed the existing Station Drainage System's removal capability AND constitutes a threat to:

(1) Personnel Safety, or (2) Safe Shutdown capability, or (3) Power production capability, or (4) Diverse And Flexible Coping Strategies capability (FLEX I EFW).

4 RA-EP-02880 Revision 04 6.0 PROCEDURE 6.1 . Flooding in Areas that Affect Safe Shutdown Systems 6.1.1 Service Water Pump Room and Adjacent Areas; GO TO ATTACHMENT 1, FLOODING AFFECTING THE SERVICE WATER PUMP ROOM.

6.1.2 Component Cooling Water.Pump Room; GO TO ATTACHMENT 2, FLOODING AFFECTING THE CCW PUMP ROOM.

6.1.3 Emergency Core Cooling Systemroom(s); GO TO ATTACHMENT 3, FLOODING AFFECTING THE ECCS ROOMS.

6.2 Flooding in Areas that Affect the Diverse and Flexible Coping Strategies 6.2.1 Emergency Feedwater Facility, GO TO ATTACHMENT 6, FLOODING AFFECTING THEEFWF.

6.3 Flooding in All Other areas 6.3.l Symptoms

High sump level alarms.

High flow (low pressure) indications for affected systems.

Automatic system response to high flow rates.

High or low tank level indications.

NOTE6.3.2 Attachment 4 contains the areas analyzed to be susceptible to internal flooding.

WARNING 6.3.2 Advise operators to use extreme caution when opening doors leading to rooms with potential internal flooding.

6.3.2 Determine the source of flooding, REFER TO ATTACHMENT 4, POTENTIAL SOURCES OF INTERNAL FLOODING.

J

Monitor Control Room indications to assist in identifying the flooding source.

Dispatch an operator to investigate the source of the problem.

5 RA-EP-02880 Revision 04 NOTE 6.3.3 The desired method of isolation will vary with the leak location and rate of leakage. Drastic actions may be required.

6.3 .3 Leak isolation may be performed by:

Manual or remote isolation of affected piping.

Shutdown of pumps NOTE6.4 Water to be removed after a flooding incident may be 'contaminated, contain oil, or other chemicals subject to legal release limitations.

6.4 Cleanup of the Affected Areas 6.4.1 IF the water to be removed is:

Potentially contaminated

Contains oil

Contains other chemicals subject to legal discharge limits, THEN notify Radiation Protection and/or Chemistry to obtain assistance in determining how to dispose of the water and determine if external notifications are required.

6.4.2 Notify Maintenance if additional resources are required to remove the water and/or clean the area.

6.4.3 Notify the appropriate maintenance group to inspect equipment that appears to have been submerged or sprayed during the incident.

6.5 Equipment restoration 6.5 .1 WHEN potentially effected equipment has been inspected and released by the responsible organizations, THEN return the equipment to service as necessary.

6 RA-EP-02880 Revision 04 7.0 FINAL CONDITIONS Use of this procedure shall be terminated when one of the following conditions are applicable:

7 .1 The flooding condition has been corrected, cleanup is completed, and necessary equipment is restored or removed from service for corrective maintenance.

7.2 Cleanup and restoration is being conducted as a part ofRA-EP-02720, Recovery Organization.

8.0 RECORDS 8.1 The following quality assurance records are completed by this procedure and shall be listed on the Records List, captured and submitted to Records.Management in accordance with NOP-SS-3300, FirstEnergy Enterprise Records Management Program:

8.1.1 None 8.2 The following non-quality assurance records are completed by this procedure and shall be listed on the Records List, captured and submitted to Records Management in accordance with NOP-SS-3300, FirstEnergy Enterprise Records Management Program:

8.2.1 None

7 RA-EP-02880 Revision 04 ATTACHMENT 1: FLOODING AFFECTING THE SERVICE WATER PUMP ROOM Page 1 of3 1.0 Symptoms 1.1 High sump level alarm from:

1.1.1 Diesel fire pump room 1.1.2 Service water valve room 2 1.2 High flow (low pressure) indications for affected systems:

1.2.1 Service water system 1.2.2 Water treatment system 1.3 System's automatic response to high flow rates (low pressure):

1.3 .1 Fire suppression system Auto. pump start(s) 1.3 .2 Cooling tower makeup pump trip 1.3 .3 Service water isolation of secondary loads 2.0 Determination of the flowing source I

2.1 Monitor Control Room indications to assist in identifying the flooding source.

2.2 The following areas have the potential to flood the Service Water Pump Room.

2.2.1 Room 51, Diesel fire pump room flooding sources:

Fire suppression piping

Screen wash piping 2.2.2 Room 52, Service water pump room flooding sources:

Service water piping

Fire suppression piping

Cooling tower makeup piping

8 RA-EP-02880 Revision 04 ATTACHMENT 1: FLOODING AFFECTING THE SERVICE WATER PUMP ROOM (Continued)

Page 2 of3 2.2.3 Room 53, Service water valve room flooding sources:

Service water piping

Fire suppression piping

Water treatment piping

Cooling tower makeup piping WARNING2.3 Advise operators to use extreme caution when opening doors leading to rooms with potential internal flooding.

2.3 Dispatch an operator to investigate the source of the problem.

3.0 Isolation of the flooding source NOTE 3.1 The desired method of isolation will vary with the leak location and rate of leakage. Drastic actions may be required.

3 .1 Leak isolation may be performed by:

- Manual or remote isolation. of affected piping

Shutdown of pumps 3.2 Non-isolable flooding may occur in the service water valve room. A break in the service water return line piping may result in back leakage from the forebay or intake structure.

9 RA-EP-02880 Revision 04 ATTACHMENT 1: FLOODING AFFECTING THE SERVICE WATER PUMP ROOM (Continued)

Page 3 of3 NOTE 3.3 For the maximum postulated flood it will take approximately 20 minutes to reach the level at whfoh drain plugging is not feasible.

3 .3 WHEN the flooding is in the service water valve room, THEN plug the floor drains in the service water pump room and the diesel fire pump room. REFER TO Attachment 5, Pipe Tunnel Drain Arrangement.

3.4 REFER TO RA-EP-01500, Emergency Classification, to determine' any required Emergency Action Levels.

3.5 For plant restoration GO TO Step 6.3.

\

10 RA-EP-02880 Revision 04 ATTACHMENT 2: FLOODING AFFECTING THE CCW PUMP ROOM Page 1 of2 1.0 Symptoms 1.1 High/low tank level alarm from:

1.1.1 Miscellaneous Waste Drain Tank (high) 1.1.2 CCW surge tank (low) 1.2 High flow (low prt:ssure) indications for affected systems:

1.2.1 Service Water system 1.2.2 Component Cooling Water system 1.3 System's automatic response to high flow rates (low pressure):

1.3 .1 Fire suppression system Auto pump start(s) 1.3 .2 Service water isolation of secondary loads 1.4 Automatic header isolation due to lowering CCW surge tank level.

2.0 Determination of the flooding source 2.1 Monitor Control Room indications to assist in identifying the flooding source.

NOTE2.2 The CCW System has detectable activity, RP assistance may be

, required.

2.2 The following systems have the potential to flood the CCW Pump Room:

Component Cooling Water system

Fire Protection system

Service Water system

11 RA-EP-02880 Revision 04 ATTACHMENT 2: FLOODING AFFECTING THE CCW PUMP ROOM (Continued)

Page 2 of2 WARNING2.3 Advise operators to use extreme caution when opening doors leading to rooms with potential internal flooding.

2.3 Dispatch an operator to investigate the source of the problem.

3.0 Isolation of the flooding source NOTE3.l The desired method of isolation will vary with the leak location and rate of leakage. Drastic actions may be required.

3 .1 Leak isolation may be performed by:

Manual or remote isolation of affected piping

Shutdown of pumps 3.2 REFER TO RA-EP-01500, Emergency Classification, to determine any required Emergency Action Levels.

3.3 For plant restoration GO TO " Step 6.3.

12 RA-EP-02880 Revision 04 ATTACHMENT 3: FLOODING AFFECTING THE ECCS ROOMS Page 1 of2 1.0 Symptoms 1.1 High sump level alarm from:

1.1.1 ECCS room 1 1.1.2 ECCS room2 1.1.3 Decay Heat Cooler pit.

1.2 High/low tank level alarm from:

1.2.1 Miscellaneous Waste Drain Tank (high) 1.2.2 CCW surge tank (low) 1.2.3 BWST (low) 1.2.4 Low makeup tank level and automatic alignment of the makeup pump suction to the BWST.

1.3 High flow (low pressure) indications for affected systems:

1.3.1 Service water system 1.3.2 Control room alarm on high makeup system pump flow depending on pipe rupture location.

1.4 System's automatic response to high flow rates (low pressure):

1.4.1 Fite suppression system Auto pump start(s) l .4\2 . Service water isolation of secondary loads.

1.5 Automatic non-essential header isolation due to lowering CCW surge tank level.

1.6 Low flow (low pressure) indications for affected systems:

1.6.1 Control room alarm on low makeup system pump flow depending on pipe rupture location.

1.6.2 Control room alarm on RCP low seal water flow.

..

13 RA-EP-02880 Revision 04 ATTACHMENT 3: FLOODING AFFECTING THE ECCS ROOMS (Continued)

Page 2 of2 2.0 Determination of the flowing source 2.1 Monitor Control Room indications to assist in identifying the flooding source.

NOTE2.2 Contamination is likely in these rooms, RP assistance will be required.

2.2 The following systems have the potential to flood the ECCS Pump Room:

.'

Borated Water Storage Tank system

Component Cooling Water system

Fire Protection system

Service Water system

Makeup system

Emergency Feedwater WARNING2.3 Advise operators to use extreme caution when opening doors leading to rooms with potential internal flooding.

2.3 Dispatch an operator to investigate the source of the problem.

3.0 Isolation of the flooding source NOTE 3.1 The desired method of isolation will vary with the leak location and rate of leakage. Drastic actions maybe required.

3.1 Leak isolation may be performed by:

Manual or remote isolation ofaffected piping.

Shutdown of pumps 3.2 REFER TO RA-EP-01500, Emergency Classification, to determine any required Emergency Action Levels.

3.3 For plant restoration GO TO Step 6.3

14 RA-EP-02880 Revision 04 ATTACHMENT 4: POTENTIAL SOURCES OF INTERNAL FLOODING Page 1of1 SCRN MFW& MN ROOM ROOM NAMES SW WASH FP BWST COND DW STM MAKEUP ccw DH cw BF

50 Screen Pump Room x x x 101 Pipe Tunnel x 202 Pioe Way Area x 208 Mechanical Penetration Room No. 1 x x* x 209 Corridor to Mechanical Penetration x x x x Room No. 1 225 Make-up Pump Room x x 227 Passage to Mechanical Penetration x RoomNo.2 236 Mechanical Penetration Room No. 2 x x 237 Auxiliary Feed Pump Room No. I x x 238 Auxiliary Feed Pump Room No. 2 x x 240 Boric Acid Addition Tanks Room x 252 Main Feedwater Pumps Room (West x Condenser Pit) 253 Condensate Pumps Pit x 260 Circ Water Pump House Substructure x Area EFWF EFW Pump Room x x 303 Mechanical Penetration Room No. 3 x x x 304 Corridor to Mechanical Penetration x x x Room No. 3 312 Spent Fuel Pool Pump Room x -

314 Mechanical Penetration Room No. 4 x x x x 318 Emergency Diesel Generator Room x x x No. I 319 Emergency Diesel Generator Room x x x No.2 '

15 RA-EP-02880 Revision 04 ATTACHMENT 5: PIPE TUNNEL DRAINS ARRANGEMENT Page 1of1

Floor Drain (8)

======:::>8 -

1 111

-. -

I 111111

- I F12C I I I I I I I I I I I I I I I I I I I I I e

I*

Equipment Drain (1) 0 Plugs and 0 Tools I* SWP#1 CTMU # 1 SW# 3 CTMU#2 SWP#2

16 RA-EP-02880 Revision 04 ATTACHMENT 6: FLOODING AFFECTING THE EFWF Page 1 of2 1.0 Symptoms 1.1 "EFW SYSTEM TRBL" 10-6-G

Low EWST Level - T89

EFWF Sump Level Alarm 1.2 High/low tank level alarm from:

1.2.1 T89 EWST ("EFW SYSTEM TRBL" 10-6-G) 1.3 System's automatic response to high flow rates (low pressure):

1.4.1 Fire suppression system Auto pump start(s) 1.4 Low flow (low pressure) indications with EFW system in operation could be indicative of a pipe break.

2.0 Determination of the flowing source 2.1 Monitor T89 EWST level indications to assist in identifying the flooding source.

NOTE 2.2 NORM-LP-7202 lists required notifications when FLEX or EFW equipment is unavailable to perform its required functions .

2.2 The following systems have the potential to flood the EFW Facility:

Emergency Feedwater system

Fire Protection system

17 RA-EP-02880 Revision 04 ATTACHMENT 6: FLOODING AFFECTING THE EFWF Page 2 of2 WARNING2.3 Advise operators to use extreme caution when opening doors leading to rooms with potential internal flooding.

2.3 Dispatch an operator to investigate the source of the problem.

3.0 Isolation of the flooding source NOTE 3.1 The desired method of isolation will vary with the leak location and rate of leakage. Drastic actions may be required.

3.1 Leak isolation may be performed by:

Manual or remote isolation of affected piping.

Shutdown of pumps 3.2 REFER TO RA-EP-01500, Emergency Classification, to determine any required Emergency Action Levels.

3.3. WHEN the leak is isolated, THEN review required specifications for any affected FLEX Program Equipment, AND EFW System Equipment. REFER TO NORM-LP-7202, Davis-Besse Specifications for FLEX Equipment Out of Service.

3.4 For plant restoration GO TO Step 6.3.

FE NOC Data Date Time: 04/30/2016 08:59:20 AM D Davis-Besse Power Station Transmittal Report Page 1of1 Copy Holder Number: 1665 Name: DOC. CONTROL DESK Location / Address: OFFSITE / USNRC DMSION OF EMERGENCY PREPAREDNESS One White Flint North Transmittal Number: DB-o4302016-252834 Transmittal Date: 4/30/2016 7:52:35 AM 11555 Rockville Pike Rockville, Maryland 20852-2738 Unit Document Number Doc Type Sheet/Section Revision Version Change Type Change Number Document Status HC AC CD TOCl TOC2 Changes DBl RA-EP-02880 PROC 00~ APPROVED 0 0 EPON DBl RA-EP-02880 PROC 0003 REVISED 0 0 EPON Use this document transmittal to update the identified documents and remove the superseded documents from use.

\

Page 1of17 Davis-Besse Nuclear Power Station PROCEDURE RA-EP-02880 INTERNAL FLOODING REVISION04 Prepared by: Ron Tyrie Procedure OW11er: Superintendent - Nuclear Operations Effective Date: 04/30/16

~~~~~~~~~~

LEVEL OF USE:

STEP-BY-STEP

2 RA-EP-02880 Revision 04 INTERNAL FLOODING TABLE OF CONTENTS 1.0 PURPOSE ..................................................................................................................................... 3

2.0 REFERENCES

......................"........................................................................................................ 3 3.0 DEFINITIONS .............................................................................................................................. 3 4.0 RESPONSIBILITIES .................................................................................................................... 3 5.0 INITIATING CONDITIONS ........................................................................................................ 3 6.0 PROCEDURE ............................................................................................................................... 4 6.1 Flooding in Areas that Affect Safe Shutdown Systems ..... :............................................ .4 6.2 Flooding in the Emergency Feedwater Facility .............................................................. .4 6.3 Flooding in All Other areas .............................................................................................. 4 6.3 Cleanup of the Affected Areas ......................................................................................... 5 6.4 Equipment restoration ...................................................................................................... 5 7.0 FINAL CONDITIONS .................. ;............................................................................................... 6 8.0 RECORDS .................................................................................................................................... 6 ATTACHMENT 1: FLOODING AFFECTING THE SERVICE WATER PUMP ROOM ............... 7 ATTACHMENT 2: FLOODING AFFECTING THE CCW PUMP ROOM ...................................... 10 ATTACHMENT 3: FLOODING AFFECTING THE ECCS ROOMS .............................................. 12 ATTACHMENT 4: POTENTIAL SOURCES OF INTERNAL FLOODING ................................... 14 ATTACHMENT 5: PIPE TUNNEL DRAINS ARRANGEMENT .................................................... 15 ATTACHMENT 6: FLOODING AFFECTING THE EFWF ............................................................. 16

3

RA-EP-02880 Revision 04 1.0 PURPOSE This procedure provides guidance for actions to be taken for internal flooding incidents.

2.0 REFERENCES

/

2.1 Developmental 2.1.1 Assessment of the Internal Flood Hazard for the Davis-Besse Nuclear Power Station, SAROS, September 1989.

2.1.,2 INPO SOER 85-5, Internal Flooding of Power Plant Buildings, December 30, 1985.

2.1.3 ECP 13-0195, Emergency Feedwater Facility 2.1.:4 ECP 13-0196, Emergency Feedwater System 2.2 Implementation 2.2.1 RA-EP-01500, Emergency Classification 2.2.2 RA-EP-02720, Recovery Organization 2.2.3 NOP-SS-3300, FirstEnergy Enterprise Records Management Program 2.2.4 NORM-LP-7202, Davis-Besse Specifications for FLEX Equipment Out of Service 3.0 DEFINITIONS 3.1 INTERNAL FLOODING- Flooding that occurs from breaches of water systems that are located inside plant buildings and are connected to large water sources such as Intake Forebay or tanks.

4.0 RESPONSIBILITIES 4.1 The Shift Manager shall implement this procedure in the event of internal flooding that constitutes a threat to:

Personnel Safety

Safe Shutdown capability

Power production capability

Diverse And Flexible Coping Strategies capability (FLEX I EFW) 5.0 INITIATING CONDITIONS This procedure shall be implemented upon Control Room identification of internal flooding incidents that exceed the existing Station Drainage System's removal capability AND constitutes a threat to:

(1) Personnel Safety, or (2) Safe Shutdown capability, or (3) Power production capability, or (4) Diverse And Flexible Coping Strategies capability (FLEX I EFW).

4 RA-EP-02880 Revision 04 6.0 PROCEDURE 6.1 . Flooding in Areas that Affect Safe Shutdown Systems 6.1.1 Service Water Pump Room and Adjacent Areas; GO TO ATTACHMENT 1, FLOODING AFFECTING THE SERVICE WATER PUMP ROOM.

6.1.2 Component Cooling Water.Pump Room; GO TO ATTACHMENT 2, FLOODING AFFECTING THE CCW PUMP ROOM.

6.1.3 Emergency Core Cooling Systemroom(s); GO TO ATTACHMENT 3, FLOODING AFFECTING THE ECCS ROOMS.

6.2 Flooding in Areas that Affect the Diverse and Flexible Coping Strategies 6.2.1 Emergency Feedwater Facility, GO TO ATTACHMENT 6, FLOODING AFFECTING THEEFWF.

6.3 Flooding in All Other areas 6.3.l Symptoms

High sump level alarms.

High flow (low pressure) indications for affected systems.

Automatic system response to high flow rates.

High or low tank level indications.

NOTE6.3.2 Attachment 4 contains the areas analyzed to be susceptible to internal flooding.

WARNING 6.3.2 Advise operators to use extreme caution when opening doors leading to rooms with potential internal flooding.

6.3.2 Determine the source of flooding, REFER TO ATTACHMENT 4, POTENTIAL SOURCES OF INTERNAL FLOODING.

J

Monitor Control Room indications to assist in identifying the flooding source.

Dispatch an operator to investigate the source of the problem.

5 RA-EP-02880 Revision 04 NOTE 6.3.3 The desired method of isolation will vary with the leak location and rate of leakage. Drastic actions may be required.

6.3 .3 Leak isolation may be performed by:

Manual or remote isolation of affected piping.

Shutdown of pumps NOTE6.4 Water to be removed after a flooding incident may be 'contaminated, contain oil, or other chemicals subject to legal release limitations.

6.4 Cleanup of the Affected Areas 6.4.1 IF the water to be removed is:

Potentially contaminated

Contains oil

Contains other chemicals subject to legal discharge limits, THEN notify Radiation Protection and/or Chemistry to obtain assistance in determining how to dispose of the water and determine if external notifications are required.