View source for BVY-94-110, Transmits Addl Info Concerning Fracture Mechanics Evaluations Performed to Support Alternative Insp Interval Re Feedwater Nozzle

{{Adams
| number = ML20078G855
| issue date = 11/08/1994
| title = Transmits Addl Info Concerning Fracture Mechanics Evaluations Performed to Support Alternative Insp Interval Re Feedwater Nozzle
| author name = Tremblay L
| author affiliation = VERMONT YANKEE NUCLEAR POWER CORP.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000271
| license number = 
| contact person = 
| document report number = BVY-94-110, NUDOCS 9411160212
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE
| page count = 45
}}

=Text=
{{#Wiki_filter:' V$RMONT YANKEE NUCLEAR POWER CORPORATION
     .vp               Ferry Road, Brattleboro, VT 05301-7002 mm h ( ./
ENGINEERING OFFICE 500 MAIN STRET BOLTON MA 01740 (508) 779-6711 November 8,1994 BVY 94-110 United States Nuclear Regulatory Commission ATI'N: Document Control Desk Washington, DC 20555

==References:==
: a. License No. DPR-28 (Docket No. 50-271)
: b. Letter VYNPC to USNRC, BVY 94-07, dated February 11,1994

==Subject:==
Feedwater Nozzle Inspection Relief Request Vermont Yankee is currently required to perform a liquid penetrant examination of the feedwater nozzle inner radius during the 1995 Refueling Outage. A relief request was submitted to the USNRC pro)osing an altemative inspection technique (Reference (b)]. On August 30,1994 a meeting was he d with USNRC staff to discuss the relief request. At that meeting we were requested to clarify cenain aspects of the inspection and qualification plan. In addition we were requested to provide additional information conceming the fracture mechanics evaluations performed to support the attemative inspection interval. The purpose of this letter is to transmit the requested information.
Vermont Yankee will conduct a blind qualification test of the automated ID inspection technique using a nozzle mockup. The nozzle will be manufactured from similar material and have similar geometry to the Vermont Yankee reactor vessel feedwater nozzle (same nozzle bare ID and same inner radius geometry). Four axial fatigue cracks with crack depths enveloping the range of depths for qualification sizmg will be implanted into the mockup and then clad with stainless steel to reflect the actual condition in the reactor vessel. This will hide the implanted flaws from the qualification inspectors.
Following the blind qualification test the flaws will be ground to simulate the grindouts in the actual feedwater nozzles. Because of the depth of the implanted flaws some remnant flaws will remain. He automated ID inspection technique will again be demonstrated for detection and sizing capability.
He manual ultrasonic inspection technique from the OD of the nozzle to cover the area of the bore under the nozzle boss, taper and safe-end attachment region will be demonstrated on the existing feedwater nozzle mockup. This mockup contains axial notches in the nozzle boss and taper regions. Qualification of this technique will be based on industry accepted techniques for relating notches and actual flaws. This mockup and the inspection technique have been reviewed by USNRC Region I personnel in past ISI inspections.
De goal of the qualification testing is to be able to detect flaws that are one eighth inch or greater into the base metal. The goal of the sizing demonstration is to be able to size flaws covering the range of one-eighth inch to one-half inch into the base metal. Early technique development has confirmed these parameters.
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                      .wr VLRMONT YANKLL NUCLEAR POWER CORPORATION United States Nuclear Regulatory Commission November 8,1994 Page 2 The results of the demonstrations will be r: ported to the USNRC no later than December 31, 1994. We will inform the NRC of the dates for the qualification demonstrations to allow witnessing if desired. The Electric Power Research Institute (EPRI) hDE Center will act as a thini party proctor for the qualifications to maintain sample integrity and to confirm NDE technique adequacy.
Enclosure 1 to this letter shows the inspection volumes of the ID and OD inspection techniques, demonstrating the coverage required by NUREG-0619. We were also requested to provide documentation supporting our determination that a four cycle inspection interval is appropriate. The four cycle interval was established by conservatively estimating the number of expected transient cycles during the interval and calculating the flaw growth rate for a missed flaw one half inch deep into the base metal. The flaw growth during the four cycle interval was less than that required to reach the ASME Section XI maximum permissible flaw depth of one tenth the section thickness of the feedwater nozzle. The details of the evaluation are contained in Enclosure 2 to this letter.
We trust that this additional information proves sufficient for your staff to complete their review of our feedwater nozzle inspection plans, resulting in approval of our relief request. Since Vermont Yankee plans to apply this inspection technique during our planned Spring,1995 refueling outage, we request that NRC assign a high priority to completion of this relief request.
Should your staff require any additional information, please contact this office.
Sincerely, VERMONT YANKEE NUCLEAR POWER CORPORATION W .C       . M            '
e.
Leonard A. Tremblay, Jr., P.E. \4 Senior Licensing Engineer Enclosures I and 2 cc:    USNRC Region I Administrator USNRC Resident inspector- VYNPS USNRC Project Manager- VYNPS

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ENCI OSliRF 2 1
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Supplemental Informatiott for Relief from NUREG-0619 Inspection Requirements Vermont Yankee Feedwater Nozzle Linear Elastic Fracture Mechanics Evaluation i
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VY UT Exam                                                 NUREG-0619 Table of Contents List of Sections:
I.      Vermont Yankee Feedwater Nozzle Operating Cycles II.       Design Transient Stress Information III.       Fatigue Crack Growth Evaluation IV.       Additional Fatigue Crack Growth Evaluations List of Tables:
Table 1. Feedwater Nozzle Fatigue Cycle Summary; Operating Cycles XIV, XV, XVI, XVII.
List of Figures:
: 1.         Startup/ Shutdown Cycle Design Transient
: 2.         Feedwater Nozzle Crack Growth; Startup/ Shutdown Cycle Design Transient
: 3.         Vermont Yankee Feedwater Nozzle Geometry
: 4.         Finite Element Model for Vermont Yankee Feedwater Nozzle
: 5.         Details of FEM - Blend Radius Region List of Attachments:
: 1.         Detailed Feedwater Nozzle Fatigue Cycle Summary; Operating Cycles XIV, XV, XVI, XVII.
: 2.         Transient Stress Informatien at the Blend and Bore Regions for the Startup/ Shutdown Cycle Design Transient.

==Reference:==

Letter James Pelletier to USNRC, " Request for Relief from NUREG-0619 Inspection Requirements", BVY 94-07, February ll, 1994.
Supplemental LEFM Information                                  Page 2

VY UT. Exam                                                                            NUREG-0619       1 I
vermont Yankee Feedwater Nozzle Operating Cycles Table 1 summarizes Vermont Yankee feedwater nozzle cyclic data over the past four operating cycles; XIV, XV, XVI, and XVII.                               This includes plant experience from September 1987 through August 1993.
This summary was compiled by Engineering with the assistance of senior Vermont Yankee Operations Department personnel. Plant operating logs, scram reports, as well as RPV pressure, reactor level, recirc temperature, feedwater flow, and feedwater                                               :
temperature records were reviewed to quantify feedwater nozzle                                         j startup/ shutdown cycling over the last four operating cycles.
Attachment 1 includes a more detailed summary by date and event.
Over the last four operating cycles there were 26 total startup                                        ,
events. Feedwater flow remained on for all startup events.                                 While       j some of these events include full pressurization and heatup many of                                    ,
these startups were from almost full pressure and temperature.                                 The design startup transient (Figure 1), which assumes the reactor was                                     -
hot during initiation of cold feedwater flow in conjunction with a full pressurization cycle, is a conservative envelope of Vermont Yankee operational startup transients over the last four operating                                     '
cycles. Based on this recent experience, we have conservatively assumed there will be 35 startup/ shutdown cycles over the next four                                   ;
operating cycles.
For the 26 shutdown events, 12 were normal shutdowns and 14 were scram related. Six (6) of the shutdowns were from low power where feedwater heating was never established. The design transient (Figure 1) which assumes a step reduction in feedwater temperature and flow conservatively envelopes the normal Vermont Yankee operational shutdown transients.
Following shutdown, during hot standby or during cooldown, the                                         l operational data was reviewed to identify any feedwater flow off/on cycling. A total of 21 off/on feedwater flow changes was                                           i identified over the four operating cycles for the A train.                               The B feedwater train had 30 off/on flow changes. The most common off/on flow events included:
i feedwater pump trip on high level following a scram, and
          - RCIC injection tests after shutdown at low feedwater flow.
Other off/on flow events included:
          - loss of feed flow due to loss of offsite power followed by HPCI and RCIC on/off injection.
The design transient (Figure 1) depicts five 0% to 25% off/on step flow changes per shutdown.         26 Startup/ shutdown design cycles I
Supplemental LEFM Information                                                               Page 3       l

VY UT Exam                                                 NUREG-0619 therefore include 130 additional on/off feedwater flow cycles.         The Vermont Yankee operating data indicates that over 26 startup/
shutdown cycles Vermont Yankee axperienced only 30 additional feedwater cycles.
Based on our review of the feedwater transient data over the past four operating cycles, the Figure 1 startup/ shutdown design transient which includes 5 off/on flow changes per shutdown is a conservative representation of typical startup/ shutdown fatigue cycle loading.
Vermont Yankee will maintain a cumulative record of feedwater nozzle startup/ shutdown transient data between UT exams. We will evaluate the data against the design' transient to assess whether the thermal duty is enveloped by the design. transient. We will keep a cumulative count of startup/ shutdown and on/off flow cycles.
Supplemental LEFM Information                                       Page 4

VY UT Exam                                                          NUREG-0619 II Design Transient Stress Information The NRC requested that Vermont Yankee supply transient stress information at the blend and bore regions for the design transient shown in Figure 1. The transient data depicts through wall stress distribution at the sections shown in the detailed section of the finite element model shown in Figure 5. Stress data for both low and high bypass leak cases are included. The stress data is presented in Attachment 2. Computer files are also included.
The computer codes used to generate the linear elastic fracture mechanics stress intensity values were modified to capture the requested stress information. Documentation and verification of the modified code was also performed.
Supplemental LEFM Information                                           Page 5

           .-       -VY UT Exam                                                                            NUREG-0619         ;
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i III                                                   i Fatigue Crack Growth Evaluation                                                 )!
Upon review of Vermont Yankee feedwater nozzle transient data the                                        l Figure 1 transient was selected as a suitable enveloping-transient                                     -
for normal startup/ shutdown cycle counting as demonstrated above in Section I.                                                                                             :
1 Fatigue crack growth curves for this transient assuming an initial                                     3 1/2 inch flaw are presented in Figure 2. These curves were developed using the ASME XI crack growth law and the following linear elastic fracture mechanics stress intensity relation:
                                                  ~
K,(t) = [xa' [0.706 Co(t) + 0.537 (2a/x) C (t) +     3 i
2                             3 0.448(a /2) C 2(t) + 0.393 (4a /3n) C 3(r)]
where:
a is the crack depth Co, C 3, C 2, C are 3         time dependent stress coefficients              ;
The time dependent stress coefficients where developed with the following third order polynomial function to represent through wall hoop stress distribution at the bore and blend sections:
o(x, t) = Co (r) + C (r) x + C2 (r) x2 + Ca (') I*
3 Both x and crack depth are measured from the inside surface.
In this relief request, we have proposed performing a more detailed                                    .
evaluation of transients and performing additional crack growth                                        !
evaluations if the number of startup/ shutdown cycles exceeds 35 cycles. As demonstrated in Section I, the Figure 1 transient is a                                      -
conservative representation of typical startup/ shutdown fatigue                                       ;
cycle loading. As shown in Figure 2, in 35 startup/ shutdown design cycles a 0.50 inch initial flaw would grow to less than 0.56 inches, much less than the 0.823 inch ASME XI allowable flaw size.
An alternate fracture mechanics evaluation was run using a startup/ shutdown transient which included, 30 hot standby off/on.                                     i feedwater injections assuming a 3350 F RPV/feedwater temperature differential and 10 cooldown off/on feedwater injections assuming a 2000 F RPV/feedwater temperature differential.
Supplemental LEFM Information                                                               Page 6

VY UT Exam                                                NUREG-0619 This transient is not easily applied to cycle counting. There are far too many assumed hot standby and cooldown cycles to apply this transient to each plant startup/ shutdown event.
On 8/30/94 this crack growth curve was pres,ented as a conservative crack growth curve for the Figure 1 design transient. Upon further evaluation, the 8/30/94 curve was found to b9 an overly conservative representation. The Figure 2 curve was specifically developed from the Figure 1 design transient and should be used as the representative curve for comparison when performing evaluations.
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Supplemental LEFM Information                                 Page 7

VY UT Exam                                                                          NUREG-0619 IV Additional Fatigue Crack Growth Evaluations A more detailed evaluation of transients and additional crack growth evaluation will be performed in the following cases:
Startup/ shutdown cycles are projected to exceed 35 cycles prior to the next scheduled UT exam.
Additional feedwater on/off cycles are projected to exceed 175 cycles (5 x 35) prior to the next scheduled UT exam.
The Figure 1 design transient cannot be used as a conservative representation of an operating transient.
In the event that conservative crack growth projections based on conservative estimates of pre-existing flaw size and fatigue loading could approach the ASME Section XI (by analysis) allowable flaw size within the four cycle inspection interval, the inspection frequency will be adjusted accordingly.
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Supplemental LEFM Information                                                                  Page 8                            )
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VY UT Exam                                                                                                             NUREG-0619                  ,
Table 1 (Page 1 of 2) .                                                                                                                 .
Feedwater Nozzle Fatigue Cycle Summnry; Operating Cycles XIV, XV, XVI, XVII.
FW HEATING FEEDWATER NOZZLE 

==SUMMARY==
RPV/FEEDWATER STARTUP-                     ON/OFF                 ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                        CYCLES                             DURING OPERATION NON                           FW             FW         A-TRAIN NOZLS                             B-TRAIN NOZLS SCRAM    SCRAM,              HTG            HTG           FLOW                        FLOW          FLOW.      FLO_W PERIOD                                                      DATE    SU      SD       SD                  ON          OFF                 ON                       OFF          ON        OFF CYCLE XIV                                10/87 TO 2/89               8       3        5                   6               6                 6                            6       7          7 CYCLE XV                                    4/89 TO 8/90             4       2        2                   3               3                 3                           3        4          4 CYCLE XVI                                 10/90 TO 3/92             12       5        7                  10              10              10                          10         16         16 CYCLE XVII                                  4/92 TO 8/93             2       2        0                   3               3                 2                           2        3          3 TOTALS                                   10/87 TO 8/93              26      12       14                  22             22               21                          21        30          30 l
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l Supplemental LEFM Information                                                                                                 Page 9 l                                                                                                              . . - _        _

VY UT Exam                                                           NUREG-0619 Table 1 (Page 2 of 2) .
Feedwater. Nozzle Fatigue Cycle Summary; Operating Cycles XIV, XV, XVI, XVII.                                                         ,
I Definitions                                                                                  ,
(Also applicable'to Attachment 1 detail cycle summary)                                      !
: 1. SU: Startup cycles include startup events ranging from startup from cold shutdown through heatup and power ascension                               i to startup from hot standby and power ascension.
: 2. Non Scram SD: Non scram shutdown cycles include operator controlled power reductions to hot standby or to cold shutdown.
: 3. Scram SD: Scram shutdown cycles include low power through full power' scram events.
i
: 4. FW Htg On/Off Cycles: Feedwater heating On/Off cycles.
During heatup and at low power feedwater is at approximately                                ,
condenser temperature. At approximately 15 to 20% power extraction steam'is routed to the feedwater heaters and                                     l feedwater heating is established. Table 1 and Attachment 1                                  :
indicate for each startup event whether feedwater heating was established and whether feedwater heating was on when each shutdown event was initiated.
: 5. A/B-Train Nozls On/Off Cycles: Feedwater train on/off flow                               l cycles. Normally feedwater flow is continuous during heatup, normal operation, and cooldown. Table 1 and Attachment 1 indicate events during heatup, hot standby, or cooldown when feedwater flow was interrupted and reinstated.
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l Supplemental LEFM Information                                            Page 10                  ,
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  . VY UT Exam                                                                            NUREG-0619 Figure 1 (Pg 1 of 2) . Startup/ Shutdown Cycle Design Transient Reactor Pressure 1600-1400-1200-1025
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Tem;rrature Transients                                    !
1 Supplemental LEFM Information                                                            Page 11

VY UT Exam                                                               NUREG-0619 l
l rigure 1 (Pg 2 of 2) . Startup/ Shutdown Cycle Design Transient                 I Flow Rafe 120 y100-t a
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Supplemental LEFM Information                                               Page 12 l l
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NUREG-0619 VY UT Exam                                                                                                                                          ,
Figure 2.         Feedwater Nozzle Crack Growth; Startup/ Shutdown Cycle Design Transient FEEDWATER NOZZLE CRACK GROWTH DESIGN CONDITIOt4 (fig 1) 0.7 0.69 p
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l                       Supplemental LEFM Information                                          Page 13

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VY UT Exam                                                                                  NUREG-0619 Figure 3.         Vermont Yankee Feedwater Nozzle Geometry l
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                                              ..S  d 8    #                                                  2      (Midway in
                 'A    9        #.
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STEEL l
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: 11. 0 0 "          4.So     5 437"           O 800" NN-CLAD nt1C 6             )
                                                                                                                                  )
l Supplemental LEFM Information                                                                   "9"

          -VY UT' Exam.                                                                              NUREG-0619
                  ' Figure 4.      Finite Element Model(FEM) for. Vermont Yankee Feedwater Nozzle E
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Supplemental LEFM Information                                                                    Page 15

      -VY UT Exam                                                                                               NUREG-0619  j Figure 5.                      Details of FEM - Blend Radius Region l
l l
44                                                                                    l
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2 12                                               ction Used for Bore Region   l NP Maximum      Blend Radius Section Supplemental LEFM Information                                                                                Page 16 i
i

s VY.UT Exam                                                                          NUREG-0619 Attachment 1.
                     -Detailed Feedwater Nozzle Fatigue Cycle Summary; operating Cycles XIV,'XV, XVI, XVII.
Supplemental LEFM Information

FW HEATING RPV/FEEDWATER STARTUP-                                                                                                 ON/OFF         ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                                                                                                    CYCLES                    DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                                                            FW                                 FW      A-TRAIN NOZLS                    B-TRAIN NOZLS                                          APPR l                                                                                                    SCRAM  SCRAM                                 HTG                                                   HTG      FLOW                FLOW         FLOW                                      FLOW          PWR DATE                    EVENT                               SU                        SD       SD                                                   ON                                OFF           ON-               OFF                       ON                         OFF          LEV 10-2-87                 HEATUP/STARTUP                       1                                                                                                                                                                                                                             12%
10-3-87                 SCRAM                                                                             1                                                                                                                1                                                   1           12%       l 1                                         1 10-3-87                 COOLDOWN 10-3-87                 HEATUP/STARTUP                       1                                                                                                            1                                                                                                                 46%
10-6-87                 RECRC PMP TRIP 10-7-87                 RECRC EMP TRIP MANUAL

FW HEATING RPV/FEEDWATER STARTUP-                             ON/OFF                       ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                               CYCLES                                  DURING OPERATION 4
i     FEEDWATER NOZZLE 

==SUMMARY==
NON                               FW              FW                A-TRAIN NOZLS          B-TRAIN NOZLS                          APPR SCRAM              SCRAM            HTG          HTG                    FLOW          FLOW    FLOW                  FLOW              Ph%
,     DATE                                    EVENT                         SU       SD                SD             ON          OFF                         ON        OFF         ON                   OFF           LEV
__________ _____________________ _______ _______ _______                                            _______ __               _ - _ _ _______ _______ -                      =__ ______                  _______
i, i     11-8 c7                                 REACTOR SCRAM                                             1                                 1                                1                                1           87%
i 1                           1.
j
 . 11-9-87                                 HEATUP/STARTUP                 1                                           1                                                                                             100%
1-30-88                                 RECRC PMP TRIP MANUAL                                                                                                                                                     50%
4-30-88                                 RECRC PMP TRIP MANUAL                                                                                                                                                     52%

i FW HEATING                                                                                <
RPV/FEEDWATER STARTUP-                                ON/OFF            ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                                CYCLES                     DURING OPERATION a                                                                                                 ____--- _____--                -__________--- ______- -----__                                  --
FEEDWATER NOZZLE 

==SUMMARY==
NON                            FW            FW      A-TRAIN NOZLS                             B-TRAIN NOZLS  APPR SCRAM           SCRAM              HTG            HTG      FLOW                FLOW                  FLOW      FLOW  PWR DATE                  EVENT                                       SU            SD           SD               ON           OFF           ON                   OFF                 ON     OFF  LEV 6-18-88               SCRAM                                                                   1                              1                                   1                         1  100%
1                                         1 6-19-88               heatup startup                               1                                            1                                                                             100%
  'i-24-88              SCRAM                                                                   1                              1                                   1                         1  100%
1                                         1 6 .'5-88              COOLDOW w      e               --
                                  --- v          -
w , ,,--    r - -.,-v             v            w -                                             --- -

FW HEATING RPV/FEEDWATER STARTUP-                                   ON/OFF             ADDITIONAL FEEDWATER CYCLES ~
SHUTDOWN CYCLES                                    CYCLES                        DURING OPERATION FEEDWATER NOZZLE SvMiARY                                                                 NON                                    FW             FW      A-TRAIN NOZLS                            B-TRAIN NOZLS                        APPR SCRAM          SCRAM                    HTG              HTG      FLOW                   FLOW              FLOW           FLOW                   PWR DATE                                                 EVENT                       SU           SD        SD                       ON            OFE            ON                   OFF             ON                OFF               LEV l
7-2-88                                              HEATUP/STARTUP               1                                                1                                                                                                    55%
7-3-88                                               SHUTDOWN FROM 55% TO 1                                                                      1                                                                                      55%
7-3-88                                               SCRAM AT LOW PWR                                    1                                                                              1                                  1             1%
1                                  1 1
7-8-88                                               STARTUP                      1                                                1                                                                                                    98%
8-24-88                                              SHUTDOWN /COOLDOWN                          1                                               1                                                                                     100%
8-26-88                                              HEATUP/STARTUP               1                                                                                                                                                      7%

l FW HEATING RPV/FEEDWATER STARTUP-                           ON/OFF                      ADDITIONAL FEEDWATER CYCLES                                               f SHUTDOWN CYCLES                             CYCLES                               DURING OPERATION                                 .
2 FEEDWATER NOZZLE 

==SUMMARY==
NON                            FW                FW              A-TRAIN NOZLS                      B-TRAIN NOZLS            APPR SCRAM   SCRAM                 HTG                HTG               FLOW                      FLOW     FLOW    FLOW              Ph"A DATE                       EVENT                             SU       SD       SD                   ON              OFF                    ON                    OFF       ON     OFF              LEV
__________ _____________________ _______ _______ _______                              _______ _______ _______ _______ _______ _ _ _                                                 =__ _______
i
'i 8-27-88                    SHUTDOWN /COOLDOWN                          1                                                                                                                              7%
i 8-28-88                    HEATUP/STARTUP                     1                                         1                                                                                          100%
i 10-29-88                   RECRC PMP TRIP MANUAL                                                                                                                                                    50%
2-11-89                    SHUTDWN/RCIC/COOLDWN                        1                                                 1                                                                         100%
1                  2

                                                                                                                                                                                                                        -O EW HEATING                                                                                            v RPV/FEEDWATER STARTUP-                                ON/OFF             ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                                 CYCLES                       DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                         FW             FW      A-TRAIN NOZLS                     B-TRAIN NOZLS                         APPR SCRAM      SCRAM              HTG              HTG       FLOW                  FLOW       ELOW                         FLOW      PWR DATE                            EVENT                          SU                   SD    SD                 ON            OFF            ON                  OFF          ON                        OFF     LEV
      --------_. --------.------------ ------- _------ - - - -                                  -   -----_- ------- ------- ---                                                                               =-    -
1                                  2 TOTALS                          CYCLE XIV                         8                  3     5                    6            6               6                      6          7                       7 l
i i
1 i
I I                                                                                                                                                                                                                              >
I l
l l

FW HEATING                                                                                                      '
RPV/FEEDWATER STARTUP-                                               ON/OFF                             ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                                            CYCLES                                       DURING OPERATION
                             ---------- -----------------_-                                              ------- ------- -------                                 -         --- -------                          ------ - - - .        =_       - = _ -------
FEEDWATER NOZZLE 

==SUMMARY==
NON                                   FW                  FW                  A-TRAIN NOZLS          B-TFAIN NOZLS                     -APPR                      ,
SCRAM                 SCRAM           HTG                 HTG                    FLOW          FLOW    FLOW                FLOW            PWR DATE                        EVENT                                                       SU                 SD                    SD             ON                OFF                         ON        OFF         ON               OFF           LEV f
f i
4-L-89                      HEATUP/STARTUP                                                 1                                                       1                                                                                               100%
r L
?
t 3-16-90                     SHUTDOWN /COOLDOWN                                                                1                                                         1                                                                          100%
1                                  1 1                     1 3-19-90                     HEATUP/STARTUP                                                 1                                                                                                                                                         8%
Lm._________2. - - _ _ - -                                             ____e__ + _ _ _ _ _ _ _ m ---nw                 w     --4a*-r  n*         hm+-4--i   w-   w                               -   .+-was ,                                         -+-  -4  *. .-_-_ _        '-__s -
m_    __r___

e FW HEATING                                                                          $
RPV/FEEDWATER STARTUP-                                 CN/OFF              ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                                    CYCLES                       DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                           FW          FW          A-TRAIN NOZLS                      B-TRAIN NOZLS     APPR SCRAM SCRAM                  HTG          HTG           FLOW              FLOW             FLOW         FLOW  Ph%
DATE                                                            EVENT                               SU                 SD    SD                    OII        OFF               ON              OFF                ON        OFF  LEV 3-21-90                                                         SCRAM                                                         1                                                                                                      8%
3-25-90                                                        HEATUP/STARTUP                        1                                                1                                                                           100%
6-1-90                                                         SCRAM / HOT STANDBYe                                           1                                      1                              1                          1  100%
1                                  1 6-2-90                                                         STARTUP                               1                                                1                                                                           100%
8-31-90                                                        SHUTDOWN /RCIC/CLDWN                                     1                                            1                                                            100%
1                          2 1                                 2

FW HEATING RPV/FEEDWATER STARTUP-                          ON/OFF                 ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                            CYCLES                           DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                            FW               FW          A-TRAIN NOZLS                           B-TRAIN NOZLS                   APPR SCRAM    SCRAM                HTG              HTG            FLOW                FLOW                FLOW    FLOW                     PhR DATE                                   EVENT                                                                   SU      SD       SD                   ON            OFF                ON                 OFF                   ON  OFF                     LEV TOTALS                                 CYCLE XV                                                                 4       2        2                      3              3                  3                  3                  4          4 4
9

                                                                                 . . ~ ,          -        . ..                     .-
                                                                                                                                                    -. . - ..                    .                             -          ,  .      .                                c _
o FW HEATING                                                                                    -
RPV/FEEDWATER STARTUP-                                        ON/OFF                        ADDITIONAL FEEDWATER CYCLES' SHUTDOWN CYCLES                                          CYCLES                                   DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                             FW                FW              A-TRAIN NOZLS           B-TRAIN NOZLS            APPR SCRAM       SCRAM                    HTG                HTG               FLOW             FLOW   FLOW      FLOW            PWR DATE                              EVENT                                    SU                     SD      SD                     ON              OFF                      ON         OFF        ON    OFF            LEV 10-15-90                         HEATUP/STARTUP                            1                                                      1                                                                                 100%
4 11-4-90                          SCRAM                                                                      1                                        1                                1                      1       94%
1                    1 11-5-90                          HEATUP/STARTUP                            1                                                      1                                                                                 100%
                                                                                                                                                                                                                                                                              +
3-13-91                           SCRAM /COOLDOWN                                                            1                                        1                                2                      2      100%
2                    2 i
3-17-91                          HEATUP/STARTUP                            1                                                                                                                                        LOW l
3-17-91                           SHUTDOWN /COOLDOWN                                               1

FW HEATING                                                                                    '
RPV/FEEDWATER STARTUP-                        ON/OFF              ADDITIONAL FEEDWATER CYCLES
* SHUTDOWN CYCLES                           CYCLES                       DURING OPERATION i         __________ _____________________ . - - - - - - - - _______ _______                                _______ _______                   -- ---- _______ _______ _______ _______
FEEDWATER NOZZLE 

==SUMMARY==
NON                            FW        FW           A-TRAIN NOZLS                        D-TRAIN NOZLS          APPR            j SCRAM       SCRAM              HTG         HTG            FLOW                 FLOW            FLOW        FLOW        PWR t
DATE                         EVENT                                       SU        SD         SD                 ON      OFF                ON                OFF                  ON     OFF        LEV
_______ _______ _                __            i.
i-i 3-18-91                      HEATUP/STARTUP                               1                                       1                                                                                  100%
!                                                                                                                                                                                                                             i i
4-23-91                      SCRAM /RECIRC TRIP                                                 1                                                                                                    100%
1                                   1                           1 1
1                      1                              ,
4 1
1

t 4.
FW HEATING                                                                                             s-RPV/FEEDWATER STARTUP-                                       -ON/OFF'                       -ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                                   CYCLES                               DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                            FW                           FW      A-TRAIN NOZLS                  B-TRAIN NOZLS                APPR T
SCRAM       SCRAM                HTG                            HTG      FLOW          FLOW             FLOW        FLOW              PWR DATE                                        EVENT                                                    SU             SD     SD                   ON                          OFF           ON        OFF                   ON       OFF            LEV s
b i
t a
1                        -l 1
f-1 1
c 1
4 r
1 i                                                                                                                                                                                                                                                                                                             ,
1                         ,
L i
i E
i

FW HEATING
* RPV/FEEDWATER STARTUP-                 ON/OFF                     ADDITIONAL FEEDWATER CYCLES SHUTDOWN CYCLES                    CYCLES                             DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
JON                    FW               FW             A-TRAIN NOZLS                            B-TRAIN NOZLS           APPR SCRAM    SCRAM         HTG               HTG              FLOW           FLOW                      FLOW        FLOW         PWR DATE                                                  EVENT                 SU       SD      SD            ON             OFF                   ON         OFF                        ON         OFF         LEV
__________ _____________________ _______ _______ _._____                                        _______ _______ _______ _.._____ _______                                                           __          _=
1                                           1 t
4-30-91                                               HEATUP/STARTUP         1                               1                                                                                               100%
6-15-91                                               SCRAM                                   1                               1                                1                                      1      100%
l                                                                                                                                                            1                                          1                              '
l i
I t
_ _ _ _.-           _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _     -     e    _ -          -                                            4                   _.___m    i------_______________                               _____.____

                                                                                            ,        a           _a m             a            .,    ,,,                 -          , -_ . - - -                  - - - - - - - - - - - - , - - , - - - - - - - - - - , - - - - - - - - - - - -
FW HEATING RPV/FEEDWATER STARTUP-                              CN/OFF          ADDITIONAL FEEDWATER CYCLES                                                                                                                    l l
SHUTDOWN CYCLES                          CYCLES                  DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                          FW            FW     A-TRAIN NOZLS                                 B-TRAIN NOZLS                                                                            APPR SCRAM    SCRAM               HTG          HTG        FLOW              FLOW                        FLOW                                    FLOW                                              PWR DATE                        EVENT                                                           SU        SD      SD                  ON        OFF           ON                OFF                           ON                                         OFF                                       LEV 6-21-91                     HEATUP/STARTUP                                                    1                                      1                                                                                                                                                         100%
7 I
I 9-8-91                      SHUTDOWN /COOLDOWN                                                         1                                         1                                                                                                                                             100%
9-15-91                    HEATUP/STARTUP                                                    1                                      1                                                                                                                                                         100%
1-16-92                    SHUTDOWN / STANDBY                                                         1                                         1                                                                                                                                               5%
1 1-16-92                    STANDBY /STARTUP                                                  1                                      1                                                                                                                                                         100%
s

FW HEATING RPV/FEEDWATER STARTUP-                        CN/OFF                        ADDITIONAL FEEDWATER' CYCLES SHUTDOWN CYCLES                       CYCLES                                                 DURING OPERATION
                                                                                     ------- - - - - _ .                 ------- -- = _ = - - ----- - _ - _ - - -                                                                         - -----
FEEDWATER NOZZLE SL'MMARY                                               NON                   FW             FW                  A-TRAIN NOZLS-                                                        B-TRAIN NOZLS                             APPR SCRAM    SCRAM          HTG           HTG                     FLOW                                       FLON                      FLOW                     FLOW              PWR SU              SD    SD            ON          OFF                             ON                                       OFF                       ON                  OFF              LEV DATE                  EVENT
  ---------- - - - = - - -       _. ------- . - - ------- ------- _ _ - - -                                                                                                                                                                              ,
3-6-92                SHUTDOWN /COOLDOWN 1                                                                                                                              5%
1 1                                      2 1                                                          2 l
l t
e
                                                                                                                .____m
_         _mm_.-..m_           _ _ _ _ _ _ , _ ,                             m._   _.m._   m__    _ _ _ _ _ _ _      __    .m_____

FW HEATING                                                                                                    .
4 RPV/FEEDWATER STARTUP-                  ON/OFF                 ADDITIONAL FEEDWATER CYCLES                                                          t SHUTDOWN CYCLES                     CYCLES                           DURING OPERATION FEEDWATER NOZZLE 

==SUMMARY==
NON                      FW              FW          A-TRAIN NOZLS              B-TRAIN NOZLS                                   APPR SCRAM    SCRAM           HTG             HTG           FLOW               FLOW    FLOW               FLOW                             PhR   ;
4 DATE                EVENT                                   SU      SD       SD             ON            OFF               ON              OFF         ON              OFF                            LEV
, 4-19-92             HEATUP/STARTUP                            1                                                                                                                                        100%
1 1
1 4-7-93              SHUTDWN/RCIC/COOLDWN                                                                                                                                                               100%
1                                        1 1                                 2 1                         2 4-16-93             HEATUP/STARTUP                            1                                1                                                                                                       100%
8-27-93             SHUTDWN/RCIC/COOLDWN                             1                                         1                                                                                       100%
RCIC TEST, TOOK 3 MIN                                                                                                     1                                 1 l
1                         1 1
l CYCLE XVIT.                               2      2        0                 3              3.              2              2         ~3                       3 TOTAL

VY UT Exam                                                 NUREG-0619 Attachment 2.
Transient Stress Information at the Blend and Bore Regions for the Startup/ Shutdown Cycle Design Transient.
The following pages include stress coefficient plots. Digitized data is included on the attached 3.5" floppy disk. Hard copy of the digitized data will be forwarded upon requested.
SUBDIRECTORY   FILE            NOZZLE LOCATION     BYPASS LEAKAGE STRESSCO       BOREHL.PRN            BORE          15 GPM STRESSCO       BLENDHL.PRN           BLEND         15 GPM STRESSCO       BORELL.PRN            BORE           O GPM STRESSCO       BLENDLL.PRN           BLEND          0 GPM I
l l
1 1
Supplemental LEFM Information

              .,                      VY UT Exam                                                                                                                                                                                NUREG-0619 Bore.(Hegh Leakoge) 100                                                     -
90           -
f    (   (       f    f 70          -
60          -
50          -
k.
                                                                  ,                          40          -
I                           30          -
f                           20
                                                                                                                                                                       -         'LLL*
3                               o            y h-i-         _
Ahhhh      WO        FWh                              /
y                     ~10              -
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                                                                                         -30             -
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                                                                                        -50             -
5
                                                                                        ~60                            .                   .          .                            .               .         .              .
0      l  2           l       4    l     0               l             8        l      10 l 12 l               14    l 1               3            5                   7                       9            11              13      15 (Thousands)
Time (sec)
CO                               C1                   C2 C3                                                                         !
i I
Blend (High Leokoge) 100                                                                                                                                                           t 90          -
                                                                                                          ~
f    f    f      f    f 70 - ,                                                                                                                                                     i 60         -
50          -
                                                                  ,                           40         -
30          -
L          u    w    L,,,   wu       _ ___
                                                                 ,Y                          20          -
g 1,                                                                                                                                                                                      '
10 b
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['\ I\ $\ $\ }h, s a                                           s                                                               -NN/\-r%                                      j
                                                                  $                     -10              -
5                       -20             -
                                                                                        -30                       ("                                                                                                                                     '
                                                                                        -40             -
f    (    l       ( f
                                                                                        -50             -
                                                                                        -60                                                                                                                  r              ,
O     l   2 3
4    l     6              l              8        l      10 l     12           l 14    l 1                            5                   7                       9            11              13      15 (Thousands)
Time (sec)
                                                                                                                                   - co                                       ct                   c:
c3 Supplemental LEEM Information

g*a                   VY UT Exam                                                                                                                             NUREG-0619 Bore (Low Leakage)
,;                                        60 50  -
                                                        \
K                                                       7 r    r    i    '
40  -
x 30  -
FY 20  -
gQv            [
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Iu               O       -b-                                                            U\r-O'6'A'r I\ I\ I\ I\
j
                                                                                     ~
                             .        -10     -
                            $                                   /
                                      -20     --
                                                                                                                        / j      j    j     f
                                      -30     -
                                      -40                                 .                    r-                           ,                         .     -
0             l         2     l   4     l     6                  l         8       l    1C l      12    l 14  l 1              3         $                        7                  9           11      13    15 (Thousands)
Time (set)
CO                              C1                  C2 i
C3 Blend (Low Leakoge) 60 50   -
c f     7
.-                                        40   -
,                                         30   -
e      w L. L       L_    t 20   -
G i
(o            10  .-
O
( (( ( L
                                                   ^                                                              '
                                                  \
i                                        /
                            .E
                            *         -to     .-
V
                                      -20     -
l   f    l    l
                                      -30                                 ,        ,            ,                            ,            ,
12 l O             l        2      !   4     l     6                 f          8       l    10 l              14  l 1               3         $                        7                  9           11      13    15 (Thousonds)
Time (sec) cc                              ci                  c2 C3 Supplemental LEFM Information
    , . - . - . . . _ - .         - . - - - . _ _ - - . . . . _ - -                          . _ _ _ _ _ - _ ____                              ____}}