ML20212D597

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Provides Final Status Rept on Electrical Calculations for Restart at Facility.All Required Calculations Performed & All Conditions Adverse to Quality Identified for Corrective Action
ML20212D597
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 12/29/1986
From: Gridley R
TENNESSEE VALLEY AUTHORITY
To: Youngblood B
Office of Nuclear Reactor Regulation
References
NUDOCS 8701020105
Download: ML20212D597 (22)
v • d • e


Text

.l TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ot SN IS7B Lookout Place DEC 29 886 Director of Nuclear Reactor Regulation Attention: Mr. B. Youngblood, Project Director PWR Project Directorate No. 4 Division of Pressurized Water Res clors (PWR)

Licensing A U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Youngblood:

In the Matter of . ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 SEQUOYAH NUCLEAR PLANT - ELECTRICAL CALCULATIONS - FINAL STATUS REPORT This transmittal completes the electrical calculations for Sequoyah Nuclear

. Plant unit 2 rectart. An entire set of calculations is contained in enclosure

3. Revisions and rationale are noted in the format sheet that preceeds each calculation. In addition, there are bars in the page margin to indicate changes from previous submittals. The Sargent and Lundy (S&L) final report, "Sequoyah Nuclear Plant Electrical Calculation Program Assessment" (April 8, 1986), and the TVA Electrical Engineering Branch Policy Memorandum PM86-02 jointly and fully define the electrical power system calculations required to support the design bases of a standardized nuclear plant. These two documents define subsets of the calculations which are specifically required to support Sequoyah unit 2 restart. These calculations consist of auxiliary power, control power, instrumentation and control, and raceway calculations. With the exception of the required raceway calculations which shall be addressed in subsequent cable issue submittals (ampacity and bend radii), enclosure 1 documents that all required sequoyah unit 2 restart calculations are essentially complete. Enclosure 1 lists the required electrical power system

[d[ 3'f calculations from the S&L final report and requirements from the TVA Electrical Engineering Branch Policy Memorandum. These are correlated with

=_ -the electrical calculation contained in enclosure 3. >

g9 g .[ Further revisions to these calculations are required to (1) verify all e if previously " unverified assumptions " (2) document conformance to

  • .M "as-constructed" electrical drawings and applicable design baseline ghi ~ ~ ~

verification program walkdown data, and (3) support modifications identified in engineering change notices and field change requests. Activities (1) and (2) shall be complete before unit 2 restart. Activity (3) is a maintenance effort and shall continue indefinitely. The Sequoyah Electrical Calculations Program identified several conditions adverse to quality. These are summarized in enclosure 2 along with the required / proposed corrective action.

Enclosure 3 contains the text of each required unit 2 restart calculation. In p

h I An Equal Opportunity Employer jl[ .

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.2-Director'of Nuclear Reactor Regulation ElEC 291996 summary. .wlth the exception of continuing verification programe as noted above the Sequoyah Electrical Calculations Program is presently r,umplete with respect to Sequoyah unit 2 restart calculations. All required calculations

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3 have.been performed and all conditions adverse to quality are identified for corrective action.

Due'to the size of the electrical calculations listed in enclosure 3, one copy of the calculations has been sent directly to_'the NRC re' viewer, Peter Kang.

If you have any questions regarding this final status report, please get in touch with Mark Burzynski at (615) 870-6172.

Very truly yours, TENNESSEE VALLEY AUTHORITY h

).61.&mn p.Gridley, Director Nuclear Safety and Licensing Enclosures cc (Enclosures):

_U.S. Nuclear Regulatory Commission Region II Attn: Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta. Georgia 30323 Mr. Carl Stahle Sequoyah Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 Mr. G. G. Zech, Director TVA Projects U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323

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ENCLOSURE 1 Restart Systems s&L and TVA Electrical Branch Tables t

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S:rgent & Lundy Assessment TVA' Policy Memorandum- TVA Electrical. Calculation (d); -

Armiliary Power Calculations -PN86-02 (EEB)

Required for Restart B43 860508 902

1. Power Cable Sizing 9. Power Cable Sizing 1. . .
c. Ampacity a. To be addressedfin cable-issues. submittal!
b. Voltage Drop b. OE2-EEBCALOO1J
c. Short-Circuit Withstand c. D2SDJ-P213350, D2SDJ-P213350-3, SQN-APS-003
2. PO2Gtration Sizing 10. Penetration-Sizing 2.
o. Maximum Short Circuit a. OE2-DS196RP
b. Continuous Current b. SQN-EPS-002
c. Overload (STOL)~ C. SQN-EPS-004
3. Auxiliary System Loading ,
11. Auxiliary System Load Flow 3. OE2-EEBCAL001

, 4. Auxiliary System Voltages 12. Auxiliary System Voltare 4. OE2-EEBCAL001 Profile 1

5. Auxiliary System Short Circuits 13. Auxiliary System Short 5. EN2-DS192RP, D2SDJ-P213350-1 Circuit A alysis
6. Diesel Generator Performance 14. Diesel Generator 6. SQN-E3-002*

Performance

5. Diesel Generator Sizing l

1

. 7. Bus Transfer 15. Bus Transfer Tests and j Analysis 7. SQN-E3-002 i

' 8. 480V Class IE Switchgear Protection 17, 480V Class IE Switchgear 8. SQN-APS-003, D25DJ-P213350-1, Selection, Protection, and D245-DS199RP, D2SDJ-P213350 Coordination i

j 9. 480V Class IE Motor Control Center 19. 480V Class IE Motor Conrol 9. SQN-APS-003, D2SDJ-P213350 1, Protection Center Selection, D245-DS199RP, D2SDJ-P213350 Protection, and Coordination l

10. Submerged Equipment Analysis 20. Submerged Equipment 10. D245-DS199RP J ,

Analysis i

)11.AppendixRAssociatedCircuit 22. Appendix R Associated 11. D2SDJ-P213350, D2SDJ-P213350-3

-l Analysis Circuit Analysis

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O o Fcr SQN unit 2 restart, only the following conditions required evaluation:

(1) Loss of offsite power (80)

(2) B0 concurrent with Safety Injection Signal (SI)' containment isolation phase A (3) B0 concurrent with SI containment isolation phase B.

O'nly modifications required for these three conditions will be porformed prior to unit 2 restart.

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Sargent & Landy Assessment -TVA Policy Memorandum'. TVAElectricaldalculation(s)l -

Cratrol Power calculations ~

PN86-02 (EEB)-

f Required for Restart 843.860508 902 i

! .m i - 1. Electrical Penetration Sizing .8.-Electrical; Penetration' 1.

j o. Maximum Short Circuit. . Sizing.and Protection -

a.- SQN-NV3-PEN-1,:SQN-EPS-003 .

j b. Continuous Current b. SQN-EPS-002

c. Overload (STOL) c. SQN-EPS-004

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2. Low Voltage AC Power Cable Sizing 11. Low Voltage AC Power 2. .

! o. Ampacity Cable Sising a. To be addressed'in cable issues submittal

b. Voltage Drop b.- SQN-VD-VAC-1,2, and 3 i c. Short-Circuit Withstand , c .~ SQN-APPR-1,2' i

! 3. DC Power Cable Sizing 12. DC Power-Cable Sizing 3.  ;

l o. Ampacity a. To be addressed in cable. issues' submittal i b. Voltage Drop fb. SQN-VD-VDC-1 and~2

! c. Short-Circuit Withstand c. SQN-APPR-1,2

4. Centrol Cable Sizing 13. Control and Instrumentation 4.

t c. Ampacity Cable Sizing a. To be addressed in cable issues submittal

b. Voltage Drop b. SQN-VD-VAC-1, 2, 3 and SQN-VD-VDC-1,2 l c. Short-Circuit Withstand
c. SQN-APPR-1,2 i 5. Class IE AC System Loading 14. Class IE.AC System 5. SQN-CPS-005 Load Flow 4
6. Class IE DC System Loading 16. Class IE DC System 5. SQN-CPS-004
Load Flow -

1 l 7. Class IE AC System Voltages 18. Class IF AC System 7. SQN-VD-VAC-1,2,3

Voltage Profile l

8.

. Class IE DC System Voltages 20. Class IE DC System 8. SQN-VD-VDC-1,2 '

i Voltage profile i

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TVA Riectrical Calculation (s)'

Sergent & Lun'dy Assessment' TVA Policy Namorandums .

C:strol' Power Calculations PN86-02 (EEB)

Required for Restart 543 860508 902

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9. C1ces IE AC System Short-Circuit

'22. Class IE AC System '9. SQN-APPR-1,2 (Appendix R' Calculations)'

Short-Circuit Analysis .

Carrents

26. Class IE AC System SQN-NV3-PEN-1, SQN-EPS-003 (Penetrations)-

Selection, Protection, and Coordination

a. SQN-CPS-003:

a.-Withstand / Interrupting Ratings b. SQN-CPS-006.

b. Inadvertent Breaker Tripping 24..Clast IE DC System fl0. SQN-APPR-1,2 (Appendix R Calculations)..
10. C1 css IE DC System Short-Circuit Short-Circuit Analysis Currents 28. Class IE DC System SQN-NV3-PEN-1, SQN-EPS-003'(Penetrations)'

Selection Protection, and Coordination

a. Withstand / Interrupting Ratings a. SQN-CPS-003
b. Inadvertent Breaker Tripping b. SQN-CPS-006
11. C1 css IE Battery Recharging Time 3. Vital Battery Sizing 11. SQN-CPS-004
5. Vital Battery Charger SQN-CPS-004 .

Sizing .

12. Class IE AC System Protection Same as S&L Item 9 12. Same as Item 9
13. Class IE DC System Protection Same as S&L Item 10 13. Same as Item 10
30. Battery Hydrogen 14. 2-HYDROGO-1 EEB 841226 926
14. Battery Hydrogen Generation Generation
15. Submerged Equipment Analysis 31. Submerged Equipment 15. SQN-SBNG-1 Analysis
32. Appendix R Associated 16. SQN-APPR-1,2
16. Appendix R Associated Circuit -Circuit Analysis Analysis DNE1 - 1663W H of 0

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Scrgent'& Lundy. Assessment' _.

TVA Policy Nemor ndum ,- TVA Electrical' Calculation (s) -

y Icarumentation-& Control Calculations- PN86-02 (EEB)

Required for Restart B43 860508 902'

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1. 46-1 (B43 860826 901).
1. Flow Element Calculations 1. Flow Element Calculations

'46-4 (B43 860915 917)~

2. HVAC Airflow Nessuring Station 2. HVAC Airflow Nessuring- 2. 46-2 (843 860826 902)

-Station

3. Sample Line Calculations 3. Sample Line Calculations 3. Not Applicable'(N/A): No safety-rel'ated sample lines required for U2' restart. .

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4. Sample Cooler Size Calculations 4. Sample Cooler Size 4. N/A: 'No safety-related coolers required'for U2 restart
5. Isskinetic Nozzle Calculations 5. Isolkinetic Nozzle 5. 46-2 (B43 860826 902)
6. Centrol Valve, Relief Valve, 6. Control Valve, Relief. 6. 46-8 (843 860917.912)

Pressure Regulator Size Valve, Pressure Regulator Size

'7. Hsct Trace Calculations 7. Heat Trace Calculations 7. 46-3 (B43 860912 902)

8. Centrol Loop Calculations 8. Control Loop Response Time 8. 46-5 (B43 860915.925) and Stability Calculations
9. Instrument Cable Design 9. Cable leakage was addressed, where applicable, in individual instrument accuracy' calculations.

Calculations -

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S:rgent & Lundy Assessment _.

TVA Policy Memorandum 'TTA Electrical Calculation (s)I ^

V Issrumentation & Control Calculations- .PN86-02 (EE,5)

-R;guired for Restart B43.860508 902 ,

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10. S:tpoint and Accuracy Calculations 9. Setpoint and Accuracy ;9. # 1 (843 860809 902)

Calculations # 2.(843 860809 901)

# 3 (843 860807 904)
  1. 4 (B43'8510291919)

> .# 5 (843 860917.916)

, # 6 (843 851029 921)

  1. 7 (843 860813 906)
  1. 8 (B43 868059 913)
  1. 9 (B43 860917 917)
  1. 10 (B43 860917 918)

{ #11 (B43 860805 910) 4 #12 (B43 860805 911)

I #13 (B43 85805 912) i #14 (B43 860512 913)

  1. 15 (843 860512 914)

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  1. 16 (B43 860501 905) l #17 (B43 860920 908)

! #13 (B43 85805 912)'

! #14 (B43 860512 913)

! #15-(843 860512 914) l #16 (B43 860501 905)

{ #17 (B43 860920 908)

  1. 18 (B43 860917 915)

! #19 (B43 860107 922)

  1. 20 (B43 860107 925)

! #21 (B43 860507 904)

#22 (B43 860507 903)

! #23 (B43 850102 911) i #24 (B43 851217 907)-

1 #25 (B43 860917 920) l #26 (B43 851205 908)

  1. 27 (B43 860805 914)
  1. 28 (B43 850830 903)L i #29 (843 860917 919)
#30 (843 861104 918) i a

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Setpoint and Accuracy Calculaticas 9. Setpoint and Accuracy #31 (843 861106'903)-

Calculations #32 (843 851118 918)

  1. 33 (843 851118 919)

.#34_(B43 860630 902)-

  1. 35 (B43 860221 903)
  1. 36 (843 860827 907)
  1. 37 (B43-860827.908). .
  1. 38 (843 860228 901)
  1. 39 (B43 860206 906)
  1. 40 (B43 860206 907)
  1. 41 (B43 862516 907)
  1. 42 (843 861003 901)
  1. 43 (B43 860624 914).

. #44 (B43 860805 901)

  1. 45 (B43 860820 902)
  1. 46 (B43 860829 917)
  1. 47 (B43 860915 910)
  1. 48 (343 860915 912)
  1. 49 (B43 860915 914)
  1. 50 (843 860915 914)
  1. 51 (B43 860915 915)
  1. 52 (843 860915 916)
  1. 53 (B43 860917 911)
  1. 54 (B43 860917 913)
  1. 55 (B43 861022 901) k s

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'S:rgent & Lundy Assessment .

TVA Policy Nemoranden TVA Electrical Calculation (s)

Icarumentation & Control Calculations PN86-02 (EEB)

Required for Restart B43 860508 902

11. Cutrol and Essential Air System' ;10. Control and Essential 11. NEB Calculation 843'861014 904' Calculations . Air System Calculations
12. Isotrument Sense Line Size 11. Instrument Sense Line 12 46-6 (B43 86106 904)~

Size Justification

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13. Elcetrical Penetrations 12. Electrical Penetrations 13. Addressed in SQN-NV3-PEN-1 and Design Criteria SQN-DC-V-11.3
14. S2p ration Justification 13. Separation Justification 14. N/A: This issue was addressed, where applicable, by individual NCRs/SCRs.

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{ ENCLOSURE 2 ,

I g CAQ/SCR/ Corrective Action Summary b

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SHEET 2/7 SCR-SONEEB8665.- PROBLEM: INCORRECT SET POINTS FOR VITAL BATTERY BOARDS 1, 11, 111, IV, AND V MAIN BREAKERS.

CORRFCTIVE ACTION: RESET MAIN BREAKERS LONG DELAY SETTING.

SCR SONEEB8523 - PROBLEM: INADEQUATE OVERCURRENT PROTECTION FOR

' TEN V3 PENETRATION CIRCUITS.

CORRFCTIVE ACTION: ADD REDUNDANT PROTECTIVE DEVICE OR RESIZE EXISTING PROTECTIVE SCHEME AS REQUIRED BY DESIGN CRITERIA SQN-DC-V-11.3.

- SCR .

SQNEEB8676 - PROBLFM: INADEQUATE CONTINUOUS CURRENT PROTECTION

'(UNIT- 1)- FOR ELECTRICAL PENETRATIONS.

SONEEB8677 CORRrCTIVE ACTION: OBTAIN EXCEPTION TO DESIGN (UNIT 2)

CRITERIA SQN-DC-V-11.3 FOR ELECTRICAL PENETRATIONS 52 AND 53.

PIR SQNEEB8657 - PROBtFM: FIFTH VITAL BATTERY SYSTEM TRANSFER

" SWITCHES ARE NOT ADEQUATELY RATED TO WITHSTAND MAXIMUM AVAILABLE FAULT CURRENT. 4 CORRECTIVE ACTION: CORRECTIVE ACTION HAS NOT YET BEEN DETERMINED. THIS-SYSTEM IS NOT REQUIRED FOR UNIT 2 RESTART.

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SHEET 3/7 SCR g

SONEEB8646 - PROBLEM: GIVEN DIESEL GENERATOR BREAKER CLOSURE +=0 AT 80% VOLTAGE AND 850 RPM AND LOADS APPLIED AT (CLOSURE OF THE BREAKER), THE VOLTAGE WILL DIP BELOW THE 25% VARIANCE AND WILL NOT RECOVER TO 90%

OF NOMINAL FOR 1.9 SECONDS FOR BLACK 0UT WITH PHASE O IcTION: BASED UPON TEST RESULTS OF g SI 7 (PERFORMED 1/23/86) BREAKER CLOSURE ACTUALLY OCCURS WHEN VOLTAGE IS GREATER THAN 100% OF d NOMINAL. THUS, NO DEFICIENCY EXISTS AND NO CORRECTIVE ACTION IS REQUIRED.

PIR j SQNEEB8666 - PROBLEM: THE AVAILABLE FAULT CURRENT AT THE 6.9KV UNIT BDS EXCEEDS THE BREAKERS' RATINGS FOR THE FOLLOWING CONDITION:

FULL LOAD OPERATION WI1H F0WER SUPPLIED FROM THE USST'S AND GENERATOR OPERATING AT 24.5KV (673 MVA AVAILABLE).

CORRECTIVE ACTION: CORRECTIVE ACTION WAS ]

ESTABLISHED UNDER SQ-DCR-P-1958.

SCR SQNEEB86124 - PROBLEM: MAXIMUM LOCA LOADING FOR C&A BLDG VENT BDS 1Al-1, 2Al-A, AND 2B1-B EXCEEDS THE FEEDER BREAKER CONTINUOUS CURRENT SETPOINTS.

CORRECTIVE ACTION! CHANGE FEEDER BREAKER h y

SETPOINT (PROPOSED).

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SHEET 4 /'7 SCR-

-SONEEB86131 PROBLEM: TABULATED WORST CASE 2-HOUR LOADING ON

+: ' VITAL BATTERY BOARDS 1, II, III, AND IV PANEL 3 BUS' EXCEEDS MANUFACTURER'S CONTINUOUS CURRENT

' RATING.

CORRECTIVE ACTION: ADDITIONAL VENDOR DATA DOCUMENTED A 5 HOUR BUS RATING ON PANEL 3 IN EXCESS OF THE 2 HOUR LOADING: THUS, NO CORRECTIVE ACTION IS REQUIRED.

SCR SONEEB86167 - PROBLEM: THIS SCR DOCUMENTED THREE CAQS: (1) LACK p 0F SELECTIVE COORDINATION FOR 480V ERCW BDS AND p! DIESEL AUX BDS; (2.) LACK OF OVERLOAD PROTECTION

/ FOR SEVERAL 480V 1E LOADS (SWGR & MCC); (3) LACK OF ADEQUATE SHORT-CIRCUIT PROTECTION FOR STATION DECK SUMP PUMPS A AND B.

CORRECTIVE ACTION: (PROPOSED) (1) ADJUST BREAKER LONG DELAY PICKUP; (2) REPLACE AND/0R ADD THERMAL OVERLOADS (:: 160); (3) REPLACE THERMAL MAGNETIC BREAKERS.

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saecr 5/7 PIRS AND SCRS FOR INSTRUMENTATION AND CONTROL SYSTEM CALCULATIONS PIR SQNEEB8668 - ER011LEM: PRESSURE SWITCHES ARE NOT QUALIFIED TO SEISMIC CATEGORY l REQUIREMENTS. FAILURE OF THESE SWITCHES WILL CAUSE THE MCR AIR CHILLERS NOT TO PERFORM THEIR INTENDED SAFETY FUNCTION.

CORRECTION ACTION: REPLACE COMPONENTS OR OBTAIN SEISMIC QUALIFICATION FOR EXISTING COMPONENTS.

PIR SONEEB8682 - PROBLEM: AN INTERLOCK FROM THE CO21 FIRE PROTECTION SYSTEM INITIATION SIGNAL THAT STOPS THE DIESEL GENERATOR ROOM EXHAUST SYSTEM IS NOT SEISMIC CLASS 1 AS REQUIRED BY FSAR SECTION 9.4.5.3.

CORRECTIVE ACTION: REPLACE COMPONENTS OR OBTAIN SEISMIC QUALIFICATION FOR EXISTING COMP 0NENTS.

PIR SQNEEB8683 - PROBLEM: HEATER CONTROL CIRCUITS ARE NOT SEISMICALLY QUALIFIED. THEIR FAILURE CAN CAUSE THE HEATERS TO TURN ON INADVERTENTLY, WITH THE POTENTIAL TO HEAT THE ASSOCIATED ROOMS 10 AN UNACCEPTABLE TEMPERATURE.

CORRECTIVE ACTTQN: REPLACE COMPONENTS OR OBTAIN SEISMIC QUALIFICATION FOR EXISTING COMPONENTS.

'y SCR SONEEB8667 - PROBLEM: AIR COMPRESSORS WERE SEISMICALLY

.' QUALIFIED; HOWEVER, QUALIFICATION DID NOT DEMONSTRATE THAT INSTRUMENT SETPOINTS WOULD NOT HAVE AN UNACCEPTABLE SHIFT FOLLOWING A SEISMIC EVENT.

CORRECTIVE ACTION: REPLACE COMPONENTS OR OBTAIN SEISMIC QUALIFICATION FOR EXISTING COMP 0NENTS.

SCR SONEEB8673 - PROBLEM: HIGH TEMPERATURE SHUTDOWN INTERLOCK IN EITHER SHUTDOWN BOARD ROOM A OR B WILL SHUT DOWN THE AIR CONDITIONING EQUIPMENT FOR THE OPPOSITE TRAINING BOARD ROOM.

CORRECTIVE ACTION: CONTROL SCHEME MUST BE REVISED.

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SCE:SQNEEB8691 -

PROBLM:

A.1"PRESENT 4ETPOINT'FOR INSTRUMENTS THAT START THE u-TRAVELING SCREEN HOTORS-FOR THE ERCW SYSTEM IS 90 L

PSIG. ACCURACY OF THESE INSTRUMENTS IS i 4.5 PSIG.

,l '- SAFETY LIMITS ARE LOWER = ~10.5, UPPER = 70.9.

TMEREFORE, OPERATIONAL LIMITS ARE VIOLATED EVEN WITH A '

SETPOINT CHANGE.

B. PRESENT SETPOINT FOR THE BRCW BACKWASH INITIATION IS 2.0 PSID INCREASING; OPERATIONAL LIMIT IS 0.5 PSID.

'THEREFORE, THE PRESENT SETPOINT VIOLATES TIIE i OPERATIONAL LIMIT.

CORRBCTIVE ACTION: SETPOINTS MUST BE CHANGED PROBLEM:

-C. -PRESENT SETPOINT FOR THE ERCW BACKWASH FLUSH INITIATION IS 20.0 PSID INCREASING. OPERATIONAL LIMIT

. IS-34.0 PSID DECREASING.- FUNCTIONAL LOGIC IS

-INCORRECT AND SETPOINT IS'IN VIOLATION OF OPERATIONAL LIMIT.,

CORRBCTIVE ACTION: SETPOINT MUST BE CHANGED AND-

' OPERATIONAL LIMITS NEED TO BE RECALCULATED.

SCR HQNEBB8684 -PROBLIRt: - PRESENT SETPOINT AND SAFETY

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LIMIT FOR THE RCS TO RHR LETDOWN LINE PIPE RUPTURE DETECTION ARE BOTH 1250F. ANY INSTRUMENT INACCURACY HILL CAUSE THE ENVIRONMENTAL LIMIT TO BE VIOLATED.

CORRBCTIVE ACTION: SBTPOINTS MUST BE CHANGED s SCR SQNEEB8689 -

PROBLEM:

A. PRESENT SETPOIM <OR NON ESSENTIAL CONTROL AIR ISOLATION IS 80 kSIG DECREASING; SYSTEM DESIGN LIMIT IS 83 PSIG. INSTRUMENT ACCURACY IS i 2.7 PSIG.

CORRECTIVE ACTION: RiEVALUATE MECHANICAL SYSTEM DESIGN LIMITS AND REVISE SETPOINT, IF REQUIRED.

PROBI,BM:

  • B. PRESENT SETPOINT FOR STARTING AND LOADING Tile ESSENTIAL AIR COMPRESSORS IS 75 PSIG DECREASING,

' SYSTEM DESIGN LIMIT IS 73 PSIG. WITH INACCURACIES OF I 2.7 PSI, SYSTEM DESIGN LIMIT COULD BE VIOLATED.

CORRECTIVE ACTION: REEVALUATE MECHANICAL SYSTEM DESIGN LIMITS AND REVISE SETPOINT, IF REQUIRED.

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SHGET 7/7 SCR SQNEEB8690 -

U PROBI,IDE:

A. 'THE AUTOMATIC CONTROL'FOR THE TURBINE DRIVEN F.W." PUMP -

IS SET FOR 880 GPM. THE SETPOINT TO LOCK OUT MANUAL CONTROL IS 880 GPM OR GREATER. THEREFORE, MANUAL CONTROL IS EFFECTIVELY PRESENTED. OPERATING PROCEDURES REQUIRE MANUAL CONTROL.

CORRECTIVE ACTION: NONE. REEVALUATED SYSTEM OPERATION WITH RESPECT.TO DESIGN CRITERIA AND DETERMINED THAT A PROBLEM DID NOT. EXIST.

PROBLEM:-

B. FS-46-57 HAS A RESET ADJUST WHICH MUST BE SET TO MINIMUM TO PREVENT LOCK-UP. SURVEILLANCE INSTRUCTIONS DO NOT REQUIRE THIS ADJUSTMENT TO.BE MADE.

' CORRECTIVE ACTION: NONE. REEVALUATED SYSTEM OPERATION WITH RESPECT TO DESIGN CRITERIA AND DETERMINED THAT A PROBLEM DID NOT EXIST.

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ENCLOSURE 3 Electrical Calculation

;- LAuxiliary Power Calculations Control Power Calculations B43 861124 906 B43 861219 904 B43 861210 902- _

B43 861219 905

. B43 861003'904 B43 851028 901 B25 860619 803: B43 860929 901 B43 860813 914 .B43 860210 925

B43 860703 925 B25 860804 103

~B43 861006 901~ B43 861002 901 B43 861202'901' B43 860801607

-B43 851231 930 -B43 860808 905 B43 861210 909 B43 860829 926 B43 861222 902 EEB 850111 909 B43 860815 901 B43 861110 901 B43 861110 902 B43 860919 903 B43 860801 604 B43 860801 605 B43 861203 902 B43 861210 901 ,

B43 861210 903 I&C CALCULATIONS B43 860809 902 B43 860507 904

,B43 860423 917 B43 860507 903 B43 860809 901 EEB 850102 911 B43 860619 901 B43 851217 907

.B43 860807 904 B43 860917 920 B43 851029 919 B43 851205 908 B43 860721-903 B43 860805 914 B43 860917 916 B43 850830 903 B43 851029 921 B43 860917 919 B43 860813 906 B43 861104 918 B43 860805 913 B43 861106 903 ' --

B43 860917 917 B43 851118 918

'B43 860917 918 B43 851118 919 B43 860805 910 B43 860630 902 B43 860805 911 B43 860221 903 B43 860805 912 B43 860827 907

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,e I&C CALCULATIONS EM3 860512 913 B43 860827 908 f - '

'B43_860512 914 B43 860228 901 B43 860507 905- B43 860206 906 B43 860820 908 B43 860206 907 B43 860917;915 B43 861217 912 B43 860107 922. B43 861003 901 B43 860107'925 B43 8()624 914 B43 860805 901 B43 860915 910 B43 860820 902 B43 860915 912 B43 860826 901 B43 860915 913 B43 860826 902' B43 860915 914

-B43.860912 902 B43 860915 915 B43 860915 917 .B43 860915 916 a B43 860915 925 B43 860917 911

-B43 861106 904 B43 860917 913

-B43 860829 917 B43 861022 901

.B43 860917 912 l

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SCR SQNEEB8691 -

PROBLEM:

.A. .PRESENT SETPOINT FOR INSTRUMENTS THAT START THE

' TRAVELING SCREEN MOTORS FOR THE ERCW SYSTEM IS 90 ',

PSIC. ACCURACY OF THESE INSTRUMENTS IS % 4.5 PSIC.

SAFETY LIMITS ARE LOWER = 70.5, UPPER = 70.9.

THEREFORE, OPERATIONAL LIMITS ARE VIOLATED EVEN WITH A SETPOINT CHANGE.

B. PRESENT SETPOINT FOR THE ERCW BACKWASH INITIATION IS 2.0 PSID INCREASING; OPERATIONAL LIMIT IS 0.5 PSID.

THEREFORE,'THE PRESENT SETPO!NT VIOLATES THE OPERATIONAL LIMIT.

-CORRECTIVE ACTION: SETPOINTS MUST BE CHANGED PROBLEM:

C. PRESENT SETPOINT FOR THE ERCW BACKWASH FLUSH INITIATION IS 20.0 PSID INCREASING. OPERATIONAL LIMIT IS 34.0 PSID DECREASING. FUNCTIONAL LOGIC IS INCORRECT AND SETPOINT IS IN VIOLATION OF OPERATIONAL LIMIT.

CORRECTIVE ACTION: SETPOINT MUST BE CHANGED AND OPERATIONAL LIMITS NEED TO BE RECALCULATED.

SCR WQNEEB8684 -PROBLEM: PRESENT SETPOINT AND SAFETY LIMIT FOR THE RCS TO RHR LETDOWN LINE PIPE RUPTURE DETECTION ARE BOTH 1250F. ANY INSTRUMENT INACCURACY

.WILL CAUSE THE ENVIRONMENTAL LIMIT TO BE VIOLATED.

CORRECTIVE ACTION: SETPOINTS MUST BE CHANGED.

SCR SQNEEB8689 -

PROBLEM:

-A. PRESENT SETPOINT FOR NON ESSENTIAL CONTROL AIR ISOLATION.IS 80 PSIG DECREASING; SYSTEM DESIGN LIMIT ,

IS 83 PSIG. INSTRUMENT ACCURACY IS % 2.7 PSIG.

-CORRECTIVE ACTION: REEVALUATE MECHANICAL SYSTEM DESIGN LIMITS AND REVISE SETPOINT, IF REQUIRED.

PROBLEM: i n B. PRESENT SETPOINT FOR STARTING AND LOADING THE ESSEN1IAL AIR COMPRESSORS IS 75 PSIC DECREASING, SYSTEM DESIGN LIMIT IS 73 PSIG. WITH INACCURACIES OF

& 2.7 PSI, SYSTEM DESIGN LIMIT COULD BE VIOLATED.

CORRECTIVE ACTION: REEVALUATE MECHANICAL SYSTEM DESIGN LIMITS AND REVISE SETPOINT, IF REQUIRED.

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L SCR SQNEEB8690 -

' PROBLEM:

A. THE AUTOMATIC CONTROL FOR THE: TURBINE DRIVEN F.W. PUMP s ,IS SET FOR 880 GPM. THE SETPOINT.TO LOCK OUT MANUAL

~ '

. CONTROL IS'880 GPM OR GREATER. THEREFORE, MANUAL

' CONTROL.IS EFFECTIVELY PRESENTED. OPERATING PROCEDURES REQUIRE MANUAL CONTROL.

. CORRECTIVE ACTION: .NCNE. REEVALUATED SYSTEM OPERATION WITH RESPECT TO DESIGN CRITERIA AND DETERMINED THAT A PROBLEM.DID NOT EXIST. 4

- PROBLEM:

B. FS-46-57 HAS A RESET ADJUST WHICH'MUST BE SET TO e MINIMUM TO PREVENT LOCK-UP. SURVEILLANCE INSTRUCTIONS

  • DO NOT REQUIRE THIS ADJUSTMENT TO BE MADE.

CORRECTIVE ACTION: NONE. REEVALUATED SYSTEM OPERATION

~

WITH RESPECT TO DESIGN CRITERIA AND DETERMINED THAT A

' PROBLEM DID NOT EXIST.

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