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=Text=
=Text=
{{#Wiki_filter:l June 26,1997 1           Mr. Oliver D. Kingsley, Jr.                                                                   l President, TVA Nuclear and Chief Nuclear Officer Tennessee Valley Authority 6A Lookout Place 1101 Market Street                                                                           I Chattanooga, TN 37402-2801
{{#Wiki_filter:June 26,1997 1
Mr. Oliver D. Kingsley, Jr.
President, TVA Nuclear and Chief Nuclear Officer Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801


==SUBJECT:==
==SUBJECT:==
BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. M97412, M97413, AND M97414)                     l (TS 386)                                                                         l
BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. M97412, M97413, AND M97414)
(TS 386)


==Dear Mr. Kingsley:==
==Dear Mr. Kingsley:==
 
On December 11, 1996, the Tennessee Valley Authority (TVA) requested amendments to the operating licenses for the Browns Ferry Nuclear Plant (BFN)
1 On December 11, 1996, the Tennessee Valley Authority (TVA) requested amendments to the operating licenses for the Browns Ferry Nuclear Plant (BFN)
Units 1, 2, and 3.
Units 1, 2, and 3. This request proposed changing technical'. specifications (TS) for the as-found setpoint tolerance for the main steam safety / relief valves from fl% to i3%. The U.S. Nuclear Regulatory Commission (NRC) staff                   )
This request proposed changing technical'. specifications (TS) for the as-found setpoint tolerance for the main steam safety / relief valves from fl% to i3%.
has determined that additional information will be requiredito complete its                   l review of TVA's request. The additional information requested is described in                 l the enclosure.-                     ,
The U.S. Nuclear Regulatory Commission (NRC) staff has determined that additional information will be requiredito complete its review of TVA's request.
The NRC staff understands that TVA has not established a schedule for BFN Unit I restart.       TVA stated that analyses required for the increased setpoint tolerance will be performed prior to BFN Unit I restart. TVA also noted that the increased setpoint tolerance had been incorporated into the proposed BFN improved technical specification (ITS) conversion submitted on September 6, 1996. Since the BFN Unit 1 proposed ITS include the. change in tolerance, there is no need to track this change for the current BFN Unit 1 TS.
The additional information requested is described in the enclosure.-
Therefore, the staff intends to deny the amendment requested on December 11, 1996 for BFN Unit 1. This denial will be documented in separate correspondence.
The NRC staff understands that TVA has not established a schedule for BFN Unit I restart.
TVA stated that analyses required for the increased setpoint tolerance will be performed prior to BFN Unit I restart. TVA also noted that the increased setpoint tolerance had been incorporated into the proposed BFN improved technical specification (ITS) conversion submitted on September 6, 1996.
Since the BFN Unit 1 proposed ITS include the. change in tolerance, there is no need to track this change for the current BFN Unit 1 TS.
Therefore, the staff intends to deny the amendment requested on December 11, 1996 for BFN Unit 1.
This denial will be documented in separate correspondence.
Please contact me at (301)415-1470 if you have any questions on this topic.
Please contact me at (301)415-1470 if you have any questions on this topic.
Sincerely, 30 W. CEMER CM                                       WRlMfiffah.eroJectMana9er Project Directorate 11-3 9706300186 970626                                 Division of Reactor Projects - I/II PDR P
Sincerely, 30 W. CEMER CM WRlMfiffah.eroJectMana9er Project Directorate 11-3 9(b \\
ADOCK 05000259 PDR Office of Nuclear Reactor Regulation     9(b \
9706300186 970626 Division of Reactor Projects - I/II PDR ADOCK 05000259 Office of Nuclear Reactor Regulation P
Docket Nos. 50-259, 50-260, and 50-296
PDR Docket Nos. 50-259, 50-260, and 50-296


==Enclosure:==
==Enclosure:==
Request For Additional                   Ei_stribution                 \
Request For Additional Ei_stribution
Information                           Docket File     GHammer PUBLIC         GGolub l             cc w/  
\\
Information Docket File GHammer PUBLIC GGolub l
cc w/  


==Enclosure:==
==Enclosure:==
See next page                     BFN Rdg.       BMozafari SVarga         JJohnson, RII DOCUMENT NAME:       G:\BFN\M97412.RAI                 OGC             ACRS To receive a copy of this document, indicate in the box:               "C" - Copy without attachment / enclosure         "E" - Copy with attachment / enclosure       "N" = No copy 0FFICE     PDII-3/PM /,1           lf PDII-3/LA       _4/ lC PDII-3/D f4 / pox l1                     l NAME       JWilliams /hS/             BClayton     A9~'       FHebdon/f' Ay1/
See next page BFN Rdg.
DATE       06/fp /97 F               06/-) te/97               06/ A /97 0FFICIAL RECORD COPY
BMozafari SVarga JJohnson, RII DOCUMENT NAME:
  - - _ - - - - - c 2 02 Tl
G:\\BFN\\M97412.RAI OGC ACRS To receive a copy of this document, indicate in the box:
"C" - Copy without attachment / enclosure "E" - Copy with attachment / enclosure "N" = No copy 0FFICE PDII-3/PM /,1 lf PDII-3/LA
_4/ lC PDII-3/D f4 / pox l1 l
NAME JWilliams /hS/
BClayton A9~'
FHebdon/f' Ay1/
DATE 06/fp /97 F 06/-) te/97 06/ A /97 0FFICIAL RECORD COPY
- - - - - c 2 02 Tl


1 l                                                                                             ,
1 l
i i (                                                                                           ,
i i (
l       Mr. Ol'iver D. Kingsley, Jr.                 BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority                                                           l
l Mr. Ol'iver D. Kingsley, Jr.
!                                                                                            l cc l       Mr. O. J. Zeringue, Sr. Vice President     Mr. Timothy E. Abney, Manager Nuclear Operations                           Licensing and Industry Affairs
BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority l
;      Tennessee Valley Authority                   Browns Ferry Nuclear Plant
cc l
!      6A Lookout Place                           Tennessee Valley Authority 1101 Market Street                           P.O. Box 2000 Chattanooga, TN 37402-2801                 Decatur, AL 35609 l                                                                                             ,
Mr. O. J. Zeringue, Sr. Vice President Mr. Timothy E. Abney, Manager Nuclear Operations Licensing and Industry Affairs Tennessee Valley Authority Browns Ferry Nuclear Plant 6A Lookout Place Tennessee Valley Authority 1101 Market Street P.O. Box 2000 Chattanooga, TN 37402-2801 Decatur, AL 35609 l
1 Mr. Jack A. Bailey, Vice President         Regional Administrator                   {
1 Mr. Jack A. Bailey, Vice President Regional Administrator Engineering & Technical Services U.S. Nuclear Regulatory Commission Tennessee Valley Authority Region II 6A Lookout Place 61 Forsyth Street, SW., Suite 23T85 1101 Market Street Atlanta, GA 30303-3415 Chattanooga, TN 37402-2801 Mr. Leonard D. Wert Mr. C. M. Crane, Site Vice President Senior Resident Inspector Browns Ferry Nuclear Plant Browns Ferry Nuclear Plant Tennessee Valley Authority U.S. Nuclear Regulatory Commission P.O. Box 2000 10833 Shaw Road Decatur, AL 35609 Athens, AL 35611 i
Engineering & Technical Services           U.S. Nuclear Regulatory Commission       !
General Counsel Chairman Tennessee Valley Authority Limestone County Commission ET 10H 310 West Washington Street 400 West Summit Hill Drive Athens, AL 35611 Knoxville, TN 37902 State Health Officer Mr. Raul R. Baron, General Manager Alabama Department of Public Health Nuclear Assurance and Licensing 434 Monroe Street Tennessee Valley Authority Montgomery, AL 36130-1701 4J Blue Ridge 8
Tennessee Valley Authority                 Region II 6A Lookout Place                           61 Forsyth Street, SW., Suite 23T85 1101 Market Street                         Atlanta, GA 30303-3415                     )
1101 Market Street Chattanooga, TN 37402-2801 Mr. Masoud Bajestani, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Pedro Salas, Manager Licensing and Industry Affairs Tennessee Valley Authority 4J Blue Ridge j
Chattanooga, TN 37402-2801 Mr. Leonard D. Wert Mr. C. M. Crane, Site Vice President       Senior Resident Inspector Browns Ferry Nuclear Plant                 Browns Ferry Nuclear Plant Tennessee Valley Authority               '
l 1101 Market Street l
U.S. Nuclear Regulatory Commission P.O. Box 2000                               10833 Shaw Road Decatur, AL 35609                         Athens, AL 35611 i
Chattanooga, TN 37402-2801
General Counsel                           Chairman Tennessee Valley Authority                 Limestone County Commission ET 10H                                     310 West Washington Street 400 West Summit Hill Drive                 Athens, AL 35611 Knoxville, TN 37902 State Health Officer Mr. Raul R. Baron, General Manager         Alabama Department of Public Health Nuclear Assurance and Licensing           434 Monroe Street Tennessee Valley Authority                 Montgomery, AL 36130-1701 4J Blue Ridge       8 1101 Market Street Chattanooga, TN 37402-2801 Mr. Masoud Bajestani, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Pedro Salas, Manager Licensing and Industry Affairs                                                       ,
/
Tennessee Valley Authority                                                             i 4J Blue Ridge                                                                         j l       1101 Market Street                                                                   !
l      Chattanooga, TN 37402-2801
                  /
l 1
l 1


i l                                                                                           ;
i l
l                             REQUEST FOR ADDITIONAL INFORMATION l T                                                                 -
l REQUEST FOR ADDITIONAL INFORMATION l T BROWNS FERRY NUCLEAR PLANT UNITS 2 AND 3 l
l BROWNS FERRY NUCLEAR PLANT UNITS 2 AND 3 l                                                                                           ,
l INCREASED MAIN STEAM SAFETY / RELIEF VALVE SETPOINT TOLERANCE
INCREASED MAIN STEAM SAFETY / RELIEF VALVE SETPOINT TOLERANCE               l l
: 1., page 13 of the December 11, 1996 submittal states that the hydrodynamic main steam safety / relief valves (S/RVs) loads resulting from the 3% setpoint tolerance are less than 1% higher than the " loads l
l
used in design." However, it is the NRC staff's experience via review l
: 1. Enclosure 5, page 13 of the December 11, 1996 submittal states that the hydrodynamic main steam safety / relief valves (S/RVs) loads resulting from the 3% setpoint tolerance are less than 1% higher than the " loads l           used in design." However, it is the NRC staff's experience via review l           of other analyses, such as those supporting power uprate at several             ,
of other analyses, such as those supporting power uprate at several boiling water reactors that the loads vary almost linearly with respect t
t boiling water reactors that the loads vary almost linearly with respect         I to opening pressure of the S/RVs. Therefore, it is expected that an             '
to opening pressure of the S/RVs.
increase in the S/RV setpoints to 3% would result in a 3% increase in           !
Therefore, it is expected that an increase in the S/RV setpoints to 3% would result in a 3% increase in the S/RV hydrodynamic loads.
the S/RV hydrodynamic loads.                                                     I
a.
: a.     What S/RV setpoints and setpoint tolerances were assumed for developing the above " loads used in design"?
What S/RV setpoints and setpoint tolerances were assumed for developing the above " loads used in design"?
: b.     Describe the methodology for determining the S/RV hydrodynamic loads and the analysis results which indicate only a 1% load increase for the 3% setpoint tolerance.                                 l l                                                 .
b.
It is also stated that the resulting 1% increase in the loads is negligible when combined with other combined loads; therefore, the effect of the load increases on the plant structures were not evaluated.
Describe the methodology for determining the S/RV hydrodynamic loads and the analysis results which indicate only a 1% load increase for the 3% setpoint tolerance.
What is the available structural margin such that these load c.
l It is also stated that the resulting 1% increase in the loads is negligible when combined with other combined loads; therefore, the effect of the load increases on the plant structures were not evaluated.
increases are negligible?
c.
: 2. Enclosure 5, page 13 of the December 11, 1996 submittal states that the maximum differential pressure due to the increased S/RV setpoint                 4 tolerance was evaluated for valves in the Generic Letter 89-10 program.
What is the available structural margin such that these load increases are negligible?
Please verify that the calculations which demonstrate the capability of     '
: 2., page 13 of the December 11, 1996 submittal states that the maximum differential pressure due to the increased S/RV setpoint 4
these valves to function adequately have been revised for these                 i differential pressures.                                                         ;
tolerance was evaluated for valves in the Generic Letter 89-10 program.
1
Please verify that the calculations which demonstrate the capability of these valves to function adequately have been revised for these differential pressures.
: 3. What is the basis for the high-pressure coolant injection (HPCI) and             I reactor core isolation cooling (RCIC) design requirement to provide design flow to the reactor vessel at pressures up to 1120 psig? In other words, how was the 1120 psig value originally determined?
3.
: 4. The engineering analysis describes the calculations performed to determine the required additional flow, power, and rpm needed for HPCI and RCIC.
What is the basis for the high-pressure coolant injection (HPCI) and reactor core isolation cooling (RCIC) design requirement to provide design flow to the reactor vessel at pressures up to 1120 psig?
: a.     Do the HPCI and RCIC turbines have a maximum allowable pressure?
In other words, how was the 1120 psig value originally determined?
,          b.     If so, what is the value and is the value exceeded due to l       ,          increased S/RV tolerance?
4.
                /
The engineering analysis describes the calculations performed to determine the required additional flow, power, and rpm needed for HPCI and RCIC.
a.
Do the HPCI and RCIC turbines have a maximum allowable pressure?
b.
If so, what is the value and is the value exceeded due to l
increased S/RV tolerance?
/
Enclosure l
Enclosure l


1
1 5.
                  .                                                  5. TVA's submittal includes plant-specific analyses supporting the increase S/RV setpoint tolerance for Unit 2. The cover letter states that analyses supporting the increased S/RV setpoint tolerance is being                 )
TVA's submittal includes plant-specific analyses supporting the increase S/RV setpoint tolerance for Unit 2.
performed for the next Unit 3 reload cycle.
The cover letter states that analyses supporting the increased S/RV setpoint tolerance is being
l
)
!                  a.       Verify that the necessary plant-specific analyses have been completed for the current Unit 3 operating cycle.                         l I
l performed for the next Unit 3 reload cycle.
: b.       Confirm that any differences between Units 2 and 3 that exist in i                           approved alternative operating modes (e.g., increased core flow, extended load line limit, or final feedwater temperature reduction) have been addressed for Unit 3.
a.
: c.       Describe how TVA will ensure that the increased setpoint tolerance will be reflected in future operating cycles for each unit.
Verify that the necessary plant-specific analyses have been completed for the current Unit 3 operating cycle.
I l
b.
Confirm that any differences between Units 2 and 3 that exist in i
approved alternative operating modes (e.g., increased core flow, extended load line limit, or final feedwater temperature reduction) have been addressed for Unit 3.
c.
Describe how TVA will ensure that the increased setpoint tolerance will be reflected in future operating cycles for each unit.
l i
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/
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Latest revision as of 15:32, 11 December 2024

Forwards RAI Re Licensee 961211 Request for Amends to Licenses DPR-33,DPR-52 & DPR-68.Request Proposed Changing TS for as-found Setpoint Tolerance for Main Steam Safety/Relief Valves
ML20141E001
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 06/26/1997
From: Williams J
NRC (Affiliation Not Assigned)
To: Kingsley O
TENNESSEE VALLEY AUTHORITY
References
TAC-M97412, TAC-M97413, TAC-M97414, NUDOCS 9706300186
Download: ML20141E001 (4)


Text

June 26,1997 1

Mr. Oliver D. Kingsley, Jr.

President, TVA Nuclear and Chief Nuclear Officer Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. M97412, M97413, AND M97414)

(TS 386)

Dear Mr. Kingsley:

On December 11, 1996, the Tennessee Valley Authority (TVA) requested amendments to the operating licenses for the Browns Ferry Nuclear Plant (BFN)

Units 1, 2, and 3.

This request proposed changing technical'. specifications (TS) for the as-found setpoint tolerance for the main steam safety / relief valves from fl% to i3%.

The U.S. Nuclear Regulatory Commission (NRC) staff has determined that additional information will be requiredito complete its review of TVA's request.

The additional information requested is described in the enclosure.-

The NRC staff understands that TVA has not established a schedule for BFN Unit I restart.

TVA stated that analyses required for the increased setpoint tolerance will be performed prior to BFN Unit I restart. TVA also noted that the increased setpoint tolerance had been incorporated into the proposed BFN improved technical specification (ITS) conversion submitted on September 6, 1996.

Since the BFN Unit 1 proposed ITS include the. change in tolerance, there is no need to track this change for the current BFN Unit 1 TS.

Therefore, the staff intends to deny the amendment requested on December 11, 1996 for BFN Unit 1.

This denial will be documented in separate correspondence.

Please contact me at (301)415-1470 if you have any questions on this topic.

Sincerely, 30 W. CEMER CM WRlMfiffah.eroJectMana9er Project Directorate 11-3 9(b \\

9706300186 970626 Division of Reactor Projects - I/II PDR ADOCK 05000259 Office of Nuclear Reactor Regulation P

PDR Docket Nos. 50-259, 50-260, and 50-296

Enclosure:

Request For Additional Ei_stribution

\\

Information Docket File GHammer PUBLIC GGolub l

cc w/

Enclosure:

See next page BFN Rdg.

BMozafari SVarga JJohnson, RII DOCUMENT NAME:

G:\\BFN\\M97412.RAI OGC ACRS To receive a copy of this document, indicate in the box:

"C" - Copy without attachment / enclosure "E" - Copy with attachment / enclosure "N" = No copy 0FFICE PDII-3/PM /,1 lf PDII-3/LA

_4/ lC PDII-3/D f4 / pox l1 l

NAME JWilliams /hS/

BClayton A9~'

FHebdon/f' Ay1/

DATE 06/fp /97 F 06/-) te/97 06/ A /97 0FFICIAL RECORD COPY

- - - - - c 2 02 Tl

1 l

i i (

l Mr. Ol'iver D. Kingsley, Jr.

BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority l

cc l

Mr. O. J. Zeringue, Sr. Vice President Mr. Timothy E. Abney, Manager Nuclear Operations Licensing and Industry Affairs Tennessee Valley Authority Browns Ferry Nuclear Plant 6A Lookout Place Tennessee Valley Authority 1101 Market Street P.O. Box 2000 Chattanooga, TN 37402-2801 Decatur, AL 35609 l

1 Mr. Jack A. Bailey, Vice President Regional Administrator Engineering & Technical Services U.S. Nuclear Regulatory Commission Tennessee Valley Authority Region II 6A Lookout Place 61 Forsyth Street, SW., Suite 23T85 1101 Market Street Atlanta, GA 30303-3415 Chattanooga, TN 37402-2801 Mr. Leonard D. Wert Mr. C. M. Crane, Site Vice President Senior Resident Inspector Browns Ferry Nuclear Plant Browns Ferry Nuclear Plant Tennessee Valley Authority U.S. Nuclear Regulatory Commission P.O. Box 2000 10833 Shaw Road Decatur, AL 35609 Athens, AL 35611 i

General Counsel Chairman Tennessee Valley Authority Limestone County Commission ET 10H 310 West Washington Street 400 West Summit Hill Drive Athens, AL 35611 Knoxville, TN 37902 State Health Officer Mr. Raul R. Baron, General Manager Alabama Department of Public Health Nuclear Assurance and Licensing 434 Monroe Street Tennessee Valley Authority Montgomery, AL 36130-1701 4J Blue Ridge 8

1101 Market Street Chattanooga, TN 37402-2801 Mr. Masoud Bajestani, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Pedro Salas, Manager Licensing and Industry Affairs Tennessee Valley Authority 4J Blue Ridge j

l 1101 Market Street l

Chattanooga, TN 37402-2801

/

l 1

i l

l REQUEST FOR ADDITIONAL INFORMATION l T BROWNS FERRY NUCLEAR PLANT UNITS 2 AND 3 l

l INCREASED MAIN STEAM SAFETY / RELIEF VALVE SETPOINT TOLERANCE

1., page 13 of the December 11, 1996 submittal states that the hydrodynamic main steam safety / relief valves (S/RVs) loads resulting from the 3% setpoint tolerance are less than 1% higher than the " loads l

used in design." However, it is the NRC staff's experience via review l

of other analyses, such as those supporting power uprate at several boiling water reactors that the loads vary almost linearly with respect t

to opening pressure of the S/RVs.

Therefore, it is expected that an increase in the S/RV setpoints to 3% would result in a 3% increase in the S/RV hydrodynamic loads.

a.

What S/RV setpoints and setpoint tolerances were assumed for developing the above " loads used in design"?

b.

Describe the methodology for determining the S/RV hydrodynamic loads and the analysis results which indicate only a 1% load increase for the 3% setpoint tolerance.

l It is also stated that the resulting 1% increase in the loads is negligible when combined with other combined loads; therefore, the effect of the load increases on the plant structures were not evaluated.

c.

What is the available structural margin such that these load increases are negligible?

2., page 13 of the December 11, 1996 submittal states that the maximum differential pressure due to the increased S/RV setpoint 4

tolerance was evaluated for valves in the Generic Letter 89-10 program.

Please verify that the calculations which demonstrate the capability of these valves to function adequately have been revised for these differential pressures.

3.

What is the basis for the high-pressure coolant injection (HPCI) and reactor core isolation cooling (RCIC) design requirement to provide design flow to the reactor vessel at pressures up to 1120 psig?

In other words, how was the 1120 psig value originally determined?

4.

The engineering analysis describes the calculations performed to determine the required additional flow, power, and rpm needed for HPCI and RCIC.

a.

Do the HPCI and RCIC turbines have a maximum allowable pressure?

b.

If so, what is the value and is the value exceeded due to l

increased S/RV tolerance?

/

Enclosure l

1 5.

TVA's submittal includes plant-specific analyses supporting the increase S/RV setpoint tolerance for Unit 2.

The cover letter states that analyses supporting the increased S/RV setpoint tolerance is being

)

l performed for the next Unit 3 reload cycle.

a.

Verify that the necessary plant-specific analyses have been completed for the current Unit 3 operating cycle.

b.

Confirm that any differences between Units 2 and 3 that exist in i

approved alternative operating modes (e.g., increased core flow, extended load line limit, or final feedwater temperature reduction) have been addressed for Unit 3.

c.

Describe how TVA will ensure that the increased setpoint tolerance will be reflected in future operating cycles for each unit.

l i

(

i

/

r