ML003726892
| ML003726892 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 06/23/2000 |
| From: | Vandergrift J Entergy Operations |
| To: | NRC/OCIO/IMD/RMB |
| References | |
| -RFPFR, 2CAN060012, TAC MA8418 | |
| Download: ML003726892 (73) | |
Text
--- Entergy Entergy Operations, Inc.
1448 S R. 333 Russellville, AR 72802 Tel 501 858 5000 June 23, 2000 2CAN060012 U. S. Nuclear Regulatory Commission Document Control Desk Mail Station OP 1-17 Washington, DC 20555
Subject:
Arkansas Nuclear One - Unit 2 Docket No. 50-368 License No. NPF-6 Additional Information on Proposed Risk-informed License Change Regarding Steam Generator Tubing (TAC NO. MA8418)
Gentlemen:
On March 9, 2000 (2CAN030003), Entergy Operations submitted a proposed license change to allow risk-informed operation for the remainder of the 14th operational cycle for Arkansas Nuclear One, Unit 2 (ANO-2). Supplemental information in support of the proposed change was submitted on April 11, 2000 (2CAN040005)
April 28, 2000 (2CAN040006),
May 30, 2000 (2CAN05001 1), June 20, 2000 (2CAN060015),
and June 22, 2000 (2CAN060017). The proposed license change was also discussed with the Staff during a meeting on June 8, 2000. By letter dated June 12, 2000 (2CNA060001), the Staff requested additional information necessary to continue the review of Entergy Operations' request. The requested information is attached.
Should you have questions concerning the information provided, please contact me.
Safety Assurance JDV/jjd attachments A cool
U. S. NRC June 23, 2000 2CAN060012 Page 2 cc:
Mr. Ellis W. Merschoff Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Arkansas Nuclear One P.O. Box 310' London, AR 72847 Mr. Thomas W. Alexion NRR Project Manager Region IV/ANO-2 U. S. Nuclear Regulatory Commission NRR Mail Stop 04-D-03 One White Flint North 11555 Rockville Pike Rockville, MD 20852
Attachment to 2CAN060012 Page 1 of 19 Additional Information in Support of Risk-informed License Change
- 1.
Provide a description of the plant changes required to support the new depressurization procedure.
The Emergency Core Cooling System (ECCS) vent valves are used to depressurize the Reactor Coolant System (RCS) in the event that the RCS heat sink is lost.
This would occur during a loss of all feedwater to the steam generators. Under these conditions, the RCS would continue to heat up and increase pressure until the pressurizer safeties lifted. The RCS pressure would be greater than the shutoff head for the Safety Injection System pumps and no makeup would be available to replenish the water going out the safeties. Eventually the core would boil dry.
The ECCS vent valves are used to reduce the RCS pressure below the shutoff head of the Safety Injection pumps. With the RCS depressurized, water from the Safety Injection Pumps can then enter the RCS to provide core cooling.
The water heated by the core will exit out the ECCS vent valve providing once through cooling for the core.
2ZM 204 zte~w 2F..W2 The ECCS vent valves consist of 2CV-4740-2 and 2CV-4698-1. Both valves are controlled from 2C-09 and are powered from opposite train 125 volt vital DC, making them available during a Station Blackout. The cabinets with breakers for these valves are both located in the 2B53 room (room 2091).
Attachment to 2CAN060012 Page 2 of 19 When actuated, the ECCS vent path provides a 2.624 inch diameter vent path to the quench tank.
During accident scenarios with a loss of one emergency train (both AC and DC),
the RCS cannot be depressurized using either ECCS vent or LTOP valves. The modification provides for the installation of equipment to facilitate temporary power to the ECCS vent valves.
The modification provides a simple means for both ECCS vent valves to be energized from the opposite DC bus using a temporary connection to permanently mounted twist-lock plugs.
The permanently mounted twist lock plugs will be connected to the load sides of 2D26 breaker 2D26-A2 and 2D27 breaker 2D27-A2.
')2Dol.21 2D26 2D27 2D6A
)2D27'A2 1>226.A3
)22-A3 2CV4740-2 2CV-4698-1 When loss of a DC bus occurs, the procedures direct the control room to dispatch the Emergency DC Crossconnect Watch to the 2B53 room to STANDBY for further instruction.
When the need to depressurize the RCS is identified, procedure guide the control room operator to open the ECCS vent valve on the still energized bus.
The Crossconnect Watch then opens the DC bus supply breaker to the de-energized MCC as directed by -the control room operator (2D26 or 2D27). Next, the Crossconnect Watch will open the upstream feeder breakers to both ECCS vent valves.
The Crossconnect Watch will then connect the extension cable. Once the cable connectors are locked in place, the feeder breaker to the ECCS vent valve on the energized bus is closed sending DC power to the opposite train vent valve. The second ECCS vent valve is then opened from the control room commencing depressurization of the RCS.
Attachment to 2CAN060012 Page 3 of 19 Female Plug Female Plug Male Plug Male Plug 2D26A2 RD BKBK BK 2D26A2 BK:,
2D27A2
(-)
(-)
Connected in cabinet 2D26 Stored Outside Room 2091 RD 2D27A2
(+)
Cable is 3/C #6 with Connected in cabinet 2D27 White Conductor Spared The connection cable will be stored in a cabinet located outside the 2B53 room and labeled as follows:
"FOR EMERGENCY USE ONLY" "USE PER SAMG Developed Strategy (SDS-02)"
The cables connected to each breaker will be identified with the same label. These cables will be found in the raceway between the Row "A" and "B" breakers in each cabinet.
Additional information on the use of this modification is included in the response to Questions 3 through 6.
- 2.
Based on a description of each of the dominant scenarios that contribute to the high/dry portion of your core damage frequency, provide a description of the timing, and in particular timing of cues relative to plant state. Similarly, provide a description of the cues and what instrumentation is needed to provide those cues.
The primary cues to the operator to identify when to depressurize the RCS are as follows:
"* Level in either SG is less than 70" Wide Range. Monitoring of this parameter is initiated by Annunciator Corrective Action 2K04 F(G)I "EFAS A(B) S/G ACT" in which EFAS actuates at 23% Narrow Range which is around 300" Wide Range.
"* No Main Feedwater (MFW) as alarmed on Annunciator Corrective Action Windows 2K03 A8/11 - "FEED PUMP TRIP" Emergency Feedwater (EFW) as alarmed on Annunciator Corrective Action Windows 2K05-A9 "2P-7A TURB OVERSPEED TRIP" and 2K07-A9 '2P-7B FAILURE ON EFAS"
Attachment to 2CAN060012 Page 4 of 19
"* No Auxiliary Feedwater (AFW) available as alarmed on Annunciator Corrective Action Window 2K03-JIO "2P75 TRIP" At least five (5) Core Exit Thermocouples (CETs) are reading above 800'F.
Monitoring of this parameter is initiated by Annunciator Corrective Action 2K01 A10/11 "CONT CENTER 2D01(2)
UNDERVOLT" OR 2K06 D8 "CET TEMP HI" (driven from 2TI-4793)
All cues are alarmed in the Control Room directly or indirectly.
Estimates for the time of CET high temperature cue, the mean hot leg failure, and the mean SG tube failure after time of core uncovery were calculated by MAAP and PROBFAIL. These estimates are provided in the table, below.
Time After Core Uncovery (sec)
Accident Scenario Hottest CETs Median Hot Mean SG
> 8000F Leg Failure Tube Failure High/Dry/Low: both SGs 263 3163 2902 depressurized (base)
High/Dry/High: both SGs 219 3227 3233 pressurized (pbase)
I
,. A-.*.
f t*_
fr 1
lvIelUnluILry/Low: both Suis depressurized (midbase)
High/Dry/Medium: both SGs at medium pressure (base3)
High/Dry/High: both SGs pressurized with one RCP loop seal cleared (pclr)
High/Dry/High, Low: one SG pressurized and other depressurized, RCP loop seal cleared in the dressurized SG loop (clru)
High/DryffHigh, Low: one SG pressurized and other depressurized, RCP loop seal cleared in the.
depressurized SG loop (clr) 312 3622 3989 245 3170 j
3201 243 5124 6034 231 4825 5238 236 4598 3290
Attachment to 2CAN060012 Page 5 of 19 A list of the instrumentation associated with each of the RCS depressurization cues follows.
(a)
SG level cue: 2LIS 1079 and 2LIS-1 179 (SG WR level),
(b)
Main Feedwater (MFW), Emergency Feedwater (EFW), Auxiliary Feedwater (AFW) (alarms listed previously)
(c)
CETs, Safety Parameter Display System (SPDS), Reactor Vessel Level Monitoring System (RVLMS), 2D01/02 undervoltage (u/v).
Entry conditions warranting RCS depressurization are:
(a) loss of all feedwater, (b) level on either SG < 70" WR, and (c) five or more CETs > 800'F Two scenarios and their respective response follow:
(a)
If undervoltage (u/v) relays on either DC bus 2D01 or 2D02 indicate an undervoltage condition, annunciator 2K01 will activate and ACA 2203.012A (2K01 annunciator corrective action) will direct the dedicated cross-tie operator (DXO) to proceed to 2B53 room access to obtain SDS-02 and then proceed to corridor 340 to prepare to open the ECCS vent valves by either powering 2CV-4698-1 from vital bus 2D26 or 2CV-4740-2 from vital bus 2D27. In addition, operators are instructed to monitor steam generator feed to identify whether a sustained loss of all feedwater has occurred, to monitor steam generator level to determine if SG is less than 70" WR, and to monitor the CETs to determine if the five highest CET indications are above 800'F. If all of these conditions are satisfied, then the ECCS vent valves will be opened.
(b)
If either of two core exit thermocouples (CETs) indicate a temperature greater than variable alarm setpoint (2TI-4793), i.e., greater than 700'F, annunciator 2K07 will activate Window D-8 and ACA 2203.012G (2K07 annunciator corrective action) will direct operator action.
Specifically, operators are instructed to monitor steam generator feed to identify whether a sustained loss of all feedwater has occurred, to monitor steam generator level to determine if SG is less than 70" WR, and to monitor the CETs to determine if the five highest CET indications are above 8000F. If all of these conditions are satisfied, then the ECCS vent valves will be opened. An Alert Emergency Class is declared using Emergency Action Level 9.2 (which mans the Emergency Response Organization) and the operator is directed to implement Functional Recovery EOP.
Attachment to 2CAN060012 Page 6 of 19
- 3.
Provide a copy of the procedures leading to and including the depressurization action, indicating the entry conditions.
The associated portions of draft procedures 2203.012A, 2203.012G and SDS-02 are attached. These draft procedures may be modified prior to implementation to reflect additional lessons learned.
- 4.
Provide a discussion of the training on the new depressurization procedure.
Attached are drafts of the Emergency DC Crossconnect Watch Study Guide and qual card used to train personnel on performing SDS-02. These drafts may be modified prior to implementation to reflect additional lessons learned.
- 5.
Provide a description of the actions necessary to perform the task, including an identification of who performs the actions, and where.
The associated portions of draft procedures SDS-02, 1015.001, 1015.016 and 2202.006 are attached.
These draft procedures may be modified prior to implementation to reflect additional lessons learned.
- 6.
Provide a rough estimate of the time required to perform the task.
The tasks discussed in SDS-02 can be performed in less than 15 minutes. An actual walk down of these actions was completed in less than 10 minutes. With both 2D01 and 2D02 available, the ECCS vent valves can be opened in two minutes.
- 7.
Provide an estimate of the interval of time required after occurrence of the depressurization procedure initiation cues in order to achieve a probability of 0.25 or less that the human actions needed for depressurization are not yet completed.
The time interval available for successful initiation of RCS depressurization following the last cue calling for depressurization which results in a failure probability of 0.25 or less is estimated to be about 23 minutes. This estimate is based on the use of Human Reliability Analysis quantification methods documented in the ANO-2 Individual Plant Examination and in updates to this risk analysis. It assumes that the time interval between when the highest five CETs read 800NF and the mean time for a steam generator tube failure prior to hot leg failure is about 43 minutes.
This time interval is based on PROBFAJL calculations.
Attachment to 2CAN060012 Page 7 of 19
- 8.
Provide the correlation for the Larson-Miller creep damage parameter used for the stainless steel surge line in your thermal-hydraulic analyses with the Modular Accident Analysis Program (MAAP) computer code.
The majority of the ANO-2 surge line is composed of Stainless Steel SA-351 Gr.
CF8M. However, the surge line nozzle, which connects the surge line with the hot leg, is composed of carbon steel SA-105 Gr 2.
Entergy does not have a correlation for the Larson-Miller creep damage parameter for SA-351 Gr CF8M since the surge line was not modeled as a contributor to RCS failure in the ANO-2 PROBFAIL calculations. Rather, the ANO-2 Steam Generator Tube Rupture (SGTR) risk analysis conservatively assumed that the hot leg was the only RCS piping subject to creep failure as a means of reducing RCS pressure prior to SG tube creep.
Since the hottest region of the surge line is expected to be in the vicinity of its nozzle, since the nozzle base metal is SA-105 Gr. 2 (carbon steel), and since the nozzle wall thickness near its safe end is about the same as that as the rest of the surge line, the surge line nozzle is expected to be the point of its creep failure.
The Larson-Miller Parameter (LMP) for carbon steel was previously provided. If desired, the LMIP for stainless steel 304 can also be provided.
Attachment to 2CAN060012 Page 8 of 19
- 9.
Provide the fraction of tubes currently plugged in each steam generator. If sleeves are currently installed, include their effect on net flow rate as its equivalent in number of plugged tubes.
After completion of 2P99, the repairs to the ANO-2 SGs are as follows:
SGA SGB REPAIRED TO DATE PLUGS 1487 1460 REPAIRED TO DATE SLEEVES B&W 285 48 ABB-CE 376 146 TOTAL 661 194 EQUIVALENT PLUGGED
- 1511.379 1465.985 EQUIVALENT PERCENT PLUGGED 17.97%
17.430%
AVERAGE 17.70%
- 10.
Provide any other parameter changes from the conditions specified in your previously submitted document titled Calc No. 99-E-0019-02, "ANO-2 MAAP and PROBFAIL Calculations."
No changes to the subject calculation have been made. The revised SGTR risk analysis presented at ANO's June 8, 2000, meeting with the NRC Staff continues to use the results of the MAAP calculations as input. However, the revised SGTR risk analysis no longer uses the results of the PROBFAIL calculations in 99-E-0019-02. Instead, the PROBFAIL analysis has been revised to utilize defect m and nip distributions rather than SG "fragility distributions" and these new PROBFAIL calculations are documented in the revised SGTR risk calculation.
The m and mp distributions were calculated for and applied at the same burnup conditions as were the SG fragility distributions, i.e., at the Beginning of Period (BOP), just after 2P99, at Middle of Period on 6/15/00, assuming no SG inspection/repair (MOP-NR), and at End of Period on 9/15/00, assuming no SG inspection/repair (EOP-NR).
Ninety-three (93) defects were assumed to be present in each SG after each inspection and repair.
Attachment to 2CAN060012 Page 9 of 19
- 11.
Using the most recently provided estimates of flaw growth rates and the probability of detection as a function of flaw size during your most recent inspection (2P99), provide the probability distributions for the stress magnification factors for partial through-wall cracks (mrp) and through-wall cracks (m) for each of these 3 points in time during your current operating interval: 1) start-up the fall of 1999, 2) June 15, 2000 without inspection, and
- 3) September 15, 2000, without inspection.
The following four tables of data are the Mp and/or M values for the following predicted conditions:
"* (TABLE 1) Mp for beginning of period following 2P99 (Case 1')
"* (TABLE 2) Mp for conditions at the middle of period 2P00 (Case 2') which is June 15, 2000
"* (TABLE 3) Mp for conditions at the end of period 2R14 (Case 3') which is September 15, 2000
"* (TABLE 4) M for all three conditions. There is not a separate M table for each condition since M is based on lengths and the lengths are kept constant through out the intervals This data was generated using the most recent model that was submitted based on use of the following:
"* Bi-variant probability of detection (POD) using peak depth and bobbin volts
"* Five independent POD curves used probabilistically
"* Probabilistic growth based on ANO specific data
"* Sizing uncertainty of 12.7%
"* Depth based on profiled data Also attached are the probability distribution graphs for the data listed above.
Attachment to 2CAN060012 Page 10 of 19 TABLE 1 Mp Values for Case 1' Beginning of Cycle Conditions MP CDF MP CDF MP CDF 1.1 0.06777 4.1 0.99920 7.1 0.99985 1.2 0.47099 4.2 0.99932 7.2 0.99985, 1.3 0.71055 4.3 0.99935 7.3 0.99985 1.4 0.82756 4.4 0.99942 7.4 0.99985 1.5 0.89105 4.5 0.99948 7.5 0.99986 1.6 0.92681 4.6 0.99953 7.6 0.99986 1.7 0.94922 4.7 0.99954 7.7 0.99987 1.8 0.96363 4.8 0.99959 7.8 0.99988 1.9 0.97313 4.9 0.99961 7.9 0.99988 2.0 0.97940 5.0 0.99964 8.0 0.99988 2.1 0.98441 5.1 0.99968 8.1 0.99988 2.2 0.98805 5.2 0.99970 8.2 0.99988 2.3 0.99067 5.3 0.99973 8.3 0.99988 2.4 0.99240 5.4 0.99973 8.4 0.99988 2.5 0.99382 5.5 0.99973 8.5 0.99988 2.6 0.99489 5.6 0.99974 8.6 0.99988 2.7 0.99566 5.7 0.99975 8.7 0.99988 2.8 0.99634 5.8 0.99976 8.8 0.99988 2.9 0.99690 5.9 0.99976 8.9 0.99988 3.0 0.99727 6.0 0.99976 9.0 0.99988 3.1 0.99759 6.1 0.99977 9.1 0.99991 3.2 0.99791 6.2 0.99980 9.2 0.99991 3.3 0.99815 6.3 0.99980 9.3 0.99991 3.4 0.99835 6.4 0.99982 9.4 0.99991 3.5 0.99851 6.5 0.99983 9.5 0.99991 3.6 0.99866 6.6 0.99983 9.6 0.99991 3.7 0.99881 6.7 0.99983 9.7 0.99991 3.8 0.99889 6.8 0.99983 9.8 0.99991 3.9 0.99902 6.9 0.99984 9.9 0.99991 4.0 0.99914 7.0 0.99985 10.0 0.99991
Attachment to 2CAN060012 Page 11 of 19 TABLE 2 Mp Values for Case 2' Conditions at 2P00 MP CDF MP CDF MP CDF 1.1 0.03814 4.1 0.99820 7.1 0.99960 1.2 0.37440 4.2 0.99830 7.2 0.99960 1.3 0.64070 4.3 0.99840 7.3 0.99960 1.4 0.78230 4.4 0.99860 7.4 0.99960 1.5 0.86100 4.5 0.99860 7.5 0.99960 1.6 0.90720 4.6 0.99880 7.6 0.99960 1.7 0.93490 4.7 0.99880 7.7 0.99960 1.8 0.95270 4.8 0.99890 7.8 0.99960 1.9 0.96470 4.9 0.99900 7.9 0.99960 2.0 0.97260 5.0 0.99910 8.0 0.99970 2.1 0.97850 5.1 0.99910 8.1 0.99970 2.2 0.98270 5.2 0.99920 8.2 0.99970 2.3 0.98590 5.3 0.99920 8.3 0.99970 2.4 0.98840 5.4 0.99920 8.4 0.99970 2.5 0.99020 5.5 0.99930 8.5 0.99970 2.6 0.99180 5.6 0.99930 8.6 0.99970 2.7 0.99310 5.7 0.99930 8.7 0.99970 2.8 0.99390 5.8 0.99940 8.8 0.99970 2.9 0.99470 5.9 0.99940 8.9 0.99970 3.0 0.99510 6.0 0.99940 9.0 0.99970 3.1 0.99580 6.1 0.99940 9.1 0.99970 3.2 0.99620 6.2 0.99940 9.2 0.99980 3.3 0.99650 6.3 0.99950 9.3 0.99980
-3.
3.5 3.6 3.7 3.8 3.9 4.0 v.YY5U 0.99720 0.99750 0.99770 0.99780 0.99790 0.99810 6.4 6.5 6.6 6.7 6.8 6.9 7.0 0.99950 0.99950 0.99950 0.99950 0.99950 0.99950 0.99960 9.4 9.5 9.6 9.7 9.8 9.9 10.0 0.99980 0.99980 0.99980 0.99980 0.99980 0.99980 0.99980
Attachment to 2CAN060012 Page 12 of 19 TABLE 3 Mp Values for Case 3' Conditions at 2R14 MP CDF MP CDF
_MP CDF 1.1 0.03414 4.1 0.99754 7.1 0.99917 1.2 0.33176 4.2 0.99768 7.2 0.99917 1.3 0.60255 4.3 0.99783 7.3 0.99917 1.4 0.75443 4.4 0.99798 7.4 0.99920 1.5 0.83988 4.5 0.99808 7.5 0.99921 1.6 0.89146 4.6 0.99815 7.6 0.99921 1.7 0.92253 4.7 0.99820 7.7 0.99924 1.8 0.94238 4.8 0.99830 7.8 0.99925 1.9 0.95614 4.9 0.99838 7.9 0.99927 2.0 0.96561 5.0 0.99849 8.0 0.99927 2.1 0.97261 5.1 0.99850 8.1 0.99929 2.2 0.97792 5.2 0.99856 8.2 0.99930 2.3 0.98169 5.3 0.99861 8.3 0.99931 2.4 0.98432 5.4 0.99863 8.4 0.99931 2.5 0.98676 5.5 0.99868 8.5 0.99932 2.6 0.98882 5.6 0.99874 8.6 0.99933 2.7 0.99033 5.7 0.99875 8.7 0.99933 2.8 0.99148 5.8 0.99880 8.8 0.99935 2.9 0.99257 5.9 0.99882 8.9 0.99936 3.0 0.99351 6.0 0.99885 9.0 0.99936 3.1 0.99419 6.1 0.99888 9.1 0.99936 3.2 0.99470 6.2 0.99892 9.2 0.99937 3.3 0.99518 6.3 0.99895 9.3 0.99937 3.4 0.99566 6.4 0.99901 9.4 0.99938 3.5 0.99602 6.5 0.99904 9.5 0.99940 3.6 0.99643 6.6 0.99909 9.6 0.99940 3.7 0.99679 6.7 0.99911 9.7 0.99941 3.8 0.99699 6.8 0.99914 9.8 0.99941 3.9 0.99720 6.9 0.99916 9.9 0.99941 4.0 0.99743 7.0 0.99916 10.0 0.99941
Attachment to 2CAN060012 Page 13 of 19 TABLE 4 M Values for All Operating Intervals M
CDF M
CDF M
CDF 1.0 0.00002 4.1 0.97530 7.2 1.00000 1.1 0.00002 4.2 0.97530 7.3 1.00000 1.2 0.00002 4.3 0.98160 7.4 1.00000 1.3 0.00486 4.4 0.98160 7.5 1.00000 1.4 0.01795 4.5 0.98568 7.6 1.00000 1.5 0.02815 4.6 0.98568 7.7 1.00000 1.6 0.07344 4.7 0.98568 7.8 1.00000 1.7 0.12220 4.8 0.98568 7.9 1.00000 1.8 0.16248 4.9 0.98568 8.0 1.00000 1.9 0.22495 5.0 0.98568 8.1 1.00000 2.0 0.29096 5.1 0.98568 8.2 1.00000 2.1 0.35963 5.2 0.98568 8.3 1.00000 2.2 0.43818 5.3 0.98568 8.4 1.00000 2.3 0.46410 5.4 0.99795 8.5 1.00000 2.4 0.48550 5.5 0.99795 8.6 1.00000 2.5 0.52196 5.6 0.99795 8.7 1.00000 2.6 0.56015 5.7 0.99795 8.8 1.00000 2.7 0.65145 5.8 0.99795 8.9 1.00000 2.8 0.68932 5.9 0.99979 9.0 1.00000 2.9 0.73285 6.0 1.00000 9.1 1.00000 3.0 0.74418 6.1 1.00000 9.2 1.00000 3.1 0.75898 6.2 1.00000 9.3 1.00000 3.2 0.80621 6.3 1.00000 9.4 1.00000 3.3 0.83554 6.4 1.00000 9.5 1.00000 3.4 0.87185 6.5 1.00000 9.6 1.00000 0.89144 3.6 0.89308 6.7 1.00000 3.7 0.91485 6.8 1.00000 3.8 0.93504 6.9 1 00000 3.9 0.95144 7.0 1.00000 4.0 0.97302 7.1 1.00000_
9.7 9.8 9.9 10 nn 1.00000 1.00000 1.00000 1.00000 6.9 1 00000 J.:)
6.6 1 00000 V
CD C) 0, 0
CD 0
Attachment to 2CAN060012 Page 15 of 19 CDF for Mp Values at 2P00 Conditions for ANO2 (Case 2')
1.2 1.0 S0.8 g0.6 LL 0.4 0.2 0.0 N" N CO I",..
ce)
L6 LO r..
L()
N Mp C) 01) 06 C6
[--,, - CDF
Attachment to 2CAN060012 Page 16 of 19 CDF for Mp Values at 2R14 Conditions for ANO2 (Case 3')
r I
M) 0M U) r-M..
M
)
T-M*CI LO CN-CNi i
6O 6 6o r Ný rO 06 o
Mp
--- CDF 0"
L.
1.2 1.0 0.8 0.6 0.4 0.2 0.0
Attachment to 2CAN0600 12 Page 17 of 19 1.2 1.0 0.8 0.6 u- 0.4 0.2 0.0 CDF for M for All Operating Intervals
-,,- CDF M
0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 w 0 C4 (4
cl-i Vi 4
4 6
6 C6 (d
I,:
I,:
C6 06 6 6
6 V11
Attachment to 2CAN060012 Page 18 of 19
- 12.
During the meeting between Entergy and NRC on June 8, 2000, Entergy staff stated that an improved eddy current testing calibration standard had been used for inspections conducted during the 2P99 outage. They also indicated that they had performed a study in which the eddy current testing data taken with the new and improved calibration standard was compared to data taken with the previously used calibration standard for 30 some indications. Please provide the referenced eddy current data for review by the staff.
- Also, provide bobbin probe eddy current data for a random sample of 12 tubes covering the full length of the tubes and the rotating pancake coil eddy current data for a random sample of 12 tube/tube support plate intersections.
These latter data should be those taken with the calibration standard of record, i.e., the new and improved standard, for the examinations.
During the latter part of the most recent mid-cycle outage (2P99) it was noticed that most distorted support indications (DSI) were being called at a consistent higher voltage than in the previous outages. Many possibilities were discussed and one identified change in equipment setup from previous outages was the use of toolhead calibration standards that had been borrowed from another plant. These calibration standards were used to improve inspection efficiency due to changes in the robotic manipulators used during the mid-cycle outage.
To determine the impact of the calibration standards, a test was conducted. Due to the inspection/plugging schedule of the two steam generators it was determined that a complete acquisition station with an "outage" eddy current bobbin probe was still available on the "A Cold Leg" platform. A "clean" calibration standard from the lot that had been used the previous two outages was taken to the "A Cold Leg" platform and a number of calibration standard "pulls" were accomplished using bobbin probe S/N 296917. These calibration standard "pulls" were then setup according to the current Examination Technique Specification Sheet #1 (ETSS #1) and used to compare the voltages using the 2P99 calibration standard setup. Note: voltage normalization was set at 4.00 volts on the 4 - 20% holes on each calibration standard.
Eddy current data for twelve tubes was collected and compared using the two calibration setups from the "A" SG. Data for these twelve tubes was collected previously with the same bobbin probe, s/n 296917, as the ANO calibration standard. An increased reported voltage on all DSIs were found when using the 2P99 standard versus the ANO calibration standard setup.
Approximately thirty DSIs were analyzed using both calibration standard setups and again the reported voltage was consistently greater when using the 2P99 setup compared to the ANO calibration standard setup.
Attachment to 2CAN060012 Page 19 of 19 ANO personnel have compared an additional forty two DSIs from the "B" SG and all of the reported voltages are greater when using the 2P99 standards compared to the ANO standard.
The following data is being provided to the NRC on an optical disk:
Side A The previous calibration standard from 2R13 along with 2R13 setups 32 tubes of 2P99 confirmed bobbin DSIs from the "B" SG ANO calibration standard from 2P99 along with 2P99 setups 12 random confirmed bobbin DSIs with corresponding RPC data from the "B" SG 12 random confirmed RPC SAIs with corresponding bobbin data from the "B" SG In addition, drawings of the calibration standards and ANO-2 ETSS#1 and ETSS#2 for both 2R13 and 2P99 have been provided to support the data on the optical disk.
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 11 ENTERGY SCN No.: 1 ANO-2 STEAM GENERATOR EDDY CURRENT Page: 55 EXAMINATION GUIDELINES 10.4.1 ATTACHMENT I - ETSS #1 Bobbin Examination Examination Technique Specification Sheet ETSS # I - BOBBIN PROBE Page: 1 of 4 Site: Entergy Operation Inc. Arkansas Nuclear One Unit #2 Examination Scope Applicability: Standard ASME Code Examination. Use for detection of IGA/ODSCC at non-dented drilled and eggcrate support structures, in freespan tubing and within sludge pile region. This technique includes the detection and sizing of wear at diagonal and vertical straps using differential 400/100-amplitude mix.
Instrument Tubing Manufacturer/Model: Zetec MIZ-30A or Equiv.
Material Type: Inconel 600 Data Recording Equipment OD/Wall (inch): 0.750" OD X 0.048" Wall Manuf./Media: HP HD 2.6 Gb Optical or Equiv.
Calibration Standard Software Type: ASME with Fan Bar Wear and EDM Manufacturer: Zetec Analog Signal Path Version/Revision: EN 98, 1.30 Probe Extension Manuf.: Zetec Examination Procedure Extension Type & Length: Universal 945-1760, 75 ft.
Number/Revision: HES-28 Rev. 11 Slip Ring Model Number: 508-2052 Scan Parameters Scan Direction: Pull Digitization Rate, Samples Per Inch (minimum):
Axial Direction I
_30 Circ. Direction N/A Probe Speed Sample Rate RPM Set RPM Min RPM Max
.548 IPS 1777 N/A N/A N/A
<24 IPS 1100 N/A N/A N/A Probe Description (Model/Diameter/Coil Dimensions)
Manufacturer/Part Number Length A-600-MIULC Zetec 700-1192-061 110 ft.
A-540-SF/RM / A-560 SF/RM / A-580-SF/RM Zetec 754-0402-001/D#2121-10-B/700-0402-051/D#2121-9-B 110 ft.
A-600-M/ULC (500 nose)
Zetec D# 2120-5-G 110 ft.
600-M/ULC Replaceable Foot Bobbin Probe 760-2112-001 110 ft.
Data Acquisition Calibration Differential Channels Channel &
Ch. 1 &3 Ch. 5 & 7 Ch. 9 & 12 Ch. 15 & 17 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation 100% TWH 100% TWH 100% TWH Tube Support Ring 40 deerees 40 degrees 40 degrees 90 Degrees Span Setting 100% TWH 100% TWH 100% TWH Tube Support Ring 6 divisions 6 divisions 6 divisions 5 divisions Calibration Absolute Channels Channel &
Ch. 2 & 4 Ch. 6&8 Ch. 10 & 13 Ch. 16 & 18 Ch. 11 & 14 Frequency 400 kHz 200 kHz 100 kHz 20 kHz 100 kHz Encoder Phase Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Tube Support Ring Encoder Pulse Rotation Flaws up first Flaws up first Flaws up first 90 Degrees (g 90 Degrees Span Setting 60% TWH 60% TWH 60% TWH Tube Support Ring Encoder Pulse 5 divisions 5 divisions 2 divisions 4 divisions
@ 4 divisions
ARKANSAS NUCLEAR ONE
""M ENGINEERING STANDARD No.: HES-28 SENTERGY Rev'. No.: 11 ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: I EXAMINATION GUIDELINES Page: 56 Examination Technique Specification Sheet ETSS # 1 - BOBBIN PROBE I
I Page: 2of4 Configuration Board Settings trig off I cown tConfiguration 8Name Bobbin isamplessec See Pg lof 4 rec media=
tester =
board # 1 board # 2 Iboard # 3 board # 4 board # 5 board # 6 board # 7 ba
- of channels 18 iprooe # 1 probe # 1 probe # 2 probe # 2 probe # 1 probe # 1 probe #1 prot DRIVE DRIVE DRIVE DRIVE DRIVE DRIVE DRIVE Drive Polarity IN NI ZN N2*N NL N
Group Number 2
Col Number 1
81 58 FREQ 1e I Time Siot#1 400 kHz G
D A
D A
FREQ#2 Time Slot # 2 200 kHz V
D A
D A
FREQ #3 Time Slot # 3 100kHz G x27120V D
A D
D A
D FREQ#4 T~me Slot#4 20 kHz D
A D
A RE#5Tine Slot # 5 FREQ#5 T~meSlot#5 FREC #7 T~me Slot #7 FREQSH8 T
ome Slot # 8 END LOC CH 1
1 DRIVE A D = A1-A2 P = dr A1 puA2,DP dr D1&D2 pu A1&A2
.:j THRESHOLD C'"
off DRIVE B D =11-132, A = Al B2
~Default Print (P) GAIN x6 P = dr 81 Ppu B2, DP= dr C1&C2 pu BI&B2 ACTIVE PROBES 2
DRIVE C D = Cl-C2. A = Dl-C2 Gain/PD Screen DRIVE D D = D1-D2 Special Instructions I.
The A-600-NI/U'LC probe is the primary use probe for the bobbin examination. The A-580SF/RNI and A-560SF/RNI are used to test low rows tubes.
- 2.
The A-580-SFRNI probe can be used in tubes reported as RRT with the.600" probe as directed by the FT! Level III and Entergy approsal. If needed, a 0.560 SF/R.1 probe, or a 0.540 SF/RM can be used as directed by the FTI Level III and Entergy approsal.
- 3.
Enter a message at the beginning of each calibration group indicating that the data is being acquired with either single or dual probes.
If dual probes are being used state which calibration group is the primary probe and which is the secondary probe
- 5.
When acquiring data with a single probe Coil I (differential) channels will be Chl=400 kHz, Ch3=200 kHz, Ch5=100 ktlz, ChS=20kHz and the Coil 5 (absolute) channels will be Ch2=400 kHz, Ch4=200 kHz, Ch6=100 kHz, Ch9=20 kHz.
- 6.
Slower speeds (24 IPS) are recommended in the smaller radius U-bend tubes (row 5 and below) due to probe snapping through the I -bend.
- 7.
Three recordings of the calibration standard should be performed at the beginning and end of each calibration group.
- 8.
As a minimum, a position verification and a message will be entered once per calibration group.
- 9.
Tubes, which have been mis-encoded, should be corrected by entering a message to void that entry and re-examining the tube with the Droner encode. This is recuired to maintain an accurate DSR database.
ARKANSAS NUCLEAR ONE ENGINEERING STANDARD No.: HES-28 ENTERGY Rev. No.: I I ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: I EXAMINATION GUIDELINES Page: 57 Examination Technique Specification Sheet ETSS # 1 -
BOBBIN PROBE Page: 3 of 4 Data Analysis Calibration Differential Channels Channel &
Ch 1 Ch 3 Ch 5 Ch 8 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation 100% TWH 100% TWH 100% TWH Tube Support Ring (i 40 degrees
@( 40 degrees (a@
40 degrees (a 90 Degrees Span Setting 100% TWH 100% TWH 100% TWH Tube Support Ring Minimum
( 75% FSH
(@ý 75% FSH
@ 75% FSH
@ 50% FSH Calibration Absolute Channels Channel &
Ch 2 Ch 4 Ch 6 Ch 9 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation 100% TWH 100% TWH 100% TWH Tube Support Ring a, 32 Degrees
@ 32 Degrees P@ 40 Degrees A 270 degrees Span Setting 60% TWH 60% TWH 60% TWH Tube Support Ring Minimum
@ 50% FSH
( 50% FSH P 20% FSH
@ 40% FSH Calibration Process and Other Channels Channel &
P1 (Ch 1/5)
P2 (Ch 1/3/5 turbo)
Ch 7 Frequency 400/100 kHz Diff 400/200/100 kHz Diff 100 kHz Configure & Adjust Suppress Save 100, 60, 20 N/A Parameters Support Ring Suppress TSP & TSH Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Encoder Pulse @ 90 Flaws start down Flaws start down Degrees Span Setting 100% TWH 100% TWH Encoder Pulse @ 4 Minimum I
75% FSH 50% FSH I
Divisions Voltage Normalization Calibration Curves CH Signal Set Normalize Type CH Set Points 1
4X20%'FBH 4 Vp-p All Phase 1, 3,5, PI 100, 60, 20 FBH Data Screening Left Strip Chart Right Strip Chart Lissajous P1 Ch 6 Ch P1 Reporting Requirements Condition/Region Report Ch.
Comment Absolute Drift ADI 6
Vert-Max (Low Row U-bend)
Freespan DFI
-+
Use "Free Span Bobbin Coil Indication Flow Chart" Eggcrates DSI P1 See Note 6 Tubesheet DTI P2 See Note 4 Dents DNT P1 All Dent Indications > 3 volts located anywhere.
Indication Not Reportable INR Indications detected are not reportable by guidelines Indication Not Found INF Resolution is require to research and resolve per guidelines Possible Loose Part PLP 9
Any Indication of Secondary Side Foreign Parts, See Note 9 Sludge Pile NQI P1 In the Sludge Pile
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 11 ENTERGY SCN No.: 1 ANO-2 STEAM GENERATOR EDDY CURRENT Page: 58 EXAMINATION GUIDELINES Examination Technique Specification Sheet ETSS # I -
BOBBIN PROBE I Page: 4of4 Special Instructions
- 1. Refer to Appendix I additional instructions regarding the data screening and evaluation of Bobbin Probe data. (The required extent to be analyzed for all bobbin examination is to be TEH-07H
+1.0"; data acquired outside this extent does not require analysis.)
- 2. Zoom the strip chart to a maximum value of 8 to increase visibility of small amplitude indications.
- 3.
All areas of the tubing should be examined with both P1 and Ch6 for indications and/ or drifts that may be indicative of cracking.
- 4. Review tubesheet data for indications of degradation, distortion and drifts indicative of axial or circumferential cracking. Indications may be confirmed by using Ch5, Ch6 or P2. Evaluation is typical in P1 or Chl. Based upon experience at ANO-2, take care to examine the entire tubesheet entry signal at the setup span on Chl and Ch3 for distorted signals indicative of cracking. Also observe the response of P2. The requirement to screen the entire tubesheet entry signal is critically important in both the hot leg and cold leg. Distorted signals, which may be indicative of a flaw on the bobbin, shall be flagged for RPC examination by reporting as DTI in the % column.
If the indication is not in the expansion transition, the indication should be evaluated and reported from P1.
- 5. In the presence of deposits at the top of the tubesheet, if the signal has the characteristics of a flaw on P1, report these indications as an "NQI" code and test with an RPC examination.
- 6.
Evaluate each support on the P1 process channel. Eggcrates typically have three signals representing the two edges and the center of the eggcrate. Indications can be confirmed with Chl, 3, or 5 when deposit influence is not present. Indications that are phased in the ID plane on P1 should confirm on Ch3 and/or Ch5. Indications may not always display an expected counter clockwise rotation.
- 7.
When using Auto Calibration features, make sure that you are using the file that matches the Standard being used.
- 8. Monitor the configuration widget for proper data sampling. Set the warning dialog to trigger at 30 axial samples.
- 9. Observe the stripchart and Lissajous presentations for indications occurring anywhere along the tube but especially on top of the tubesheet and supports. Possible loose parts shall be screened and reported as a Possible Loose Part (PLP) on 20 kHz absolute. This will signify the need for further characterization with a rotating probe technique.
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ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 11 ENTERGY SCN No.: I ANO-2 STEAM GENERATOR EDDY CURRENT Page: 59 1
EXAMINATION GUIDELINES 10.4.2 ATTACHMENT II - ETSS #2 RPC Examination (Pancake, Ax, and Circ)
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. Directed coils Page: 1 of 5 Site: Entergy Operation Inc. Arkansas Nuclear One Unit #2 Examination Scope Applicability: Tubesheet examinations. Diagnostic testing and/or to confirm bobbin indications. Detection of IGAJODSCC or PWSCC.
Instrument Tubing Manufacturer/Model: Zetec MIZ-30A/30-8 Material Type: Inconel 600 Data Recording Equipment ODiWall (inch): 0.750" OD X 0.048" Wall Manuf./Media: HP HD 2.6GbOptical or Equiv.
Calibration Standard Software Type: RPC EDM Notch Standard Manufacturer Zetec Analog Signal Path Version/Revision: EN98 1.30 Probe Extension Manuf.: Zetec Examination Procedure Extension Type & Length: Universal 945-1760, 75 ft.
Number/Revision: HES-28 Rev. 11 Slip Ring Model Number 508-2052 Scan Parameters Scan Direction: Push or Pull Digitization Rate, Samples Per Inch (minimum):
I Axial Direction 2.25 Circ. Direction 2..30 Probe Speed Sample Rate RPM Set RPM Min RPM Max 0.45 in/see.
1280 900 810 1086 Probe/Motor Unit Descnption (Model/Diameter/Coil Dimensions)
Length Motor Units 810-4090-000 -.610 (.115) MRPC 3C-52PH 50' or 83' 700-4055-071 -.610 9D-MRPC-52MU D# 2651-2-A -.580 (.115) MPRC 3C-52PH 50' or 83' 810-4050-001 -. 560 9D-MRPC-52MU D#3414-13-A -.600 TTS extension shaft (+2/-2") 48" Data Acquisition Calibration 0.115 Coil Channels (Dual Probes)
Channel&
Ch. 1 &4 Ch. 7& 10 Ch. 13& 17 Ch. 23&24 Frequency 300 kHz 200 kHz 100 kHz 20 kHz Phase Rotation 20% ID AX Notch 20% ID AX Notch 20% ID AX Notch Tube Support Ring Up 0 12 degrees 0 12 dearees 2 12 degrees 9 90 decrees Span Setting 40% OD Axial Notch 40% OD Axial Notch 40% OD Axial Notch Tube Support Ring
_ 2 divisions I
2 divisions 1
2 divisions I
3 Divisions Calibration Axial Sensitive Coil and Tri aer Channels (Dual Probes)
Channel&
Ch. 2 & 5 Ch. 8 & 11 Ch. 15 & 19 Ch. 14 & 18 Frequency 300 kF~z 200 k~tz 100 kHz 100 kHz Phase Rotation 20% ID AX Notch 20% ID AX Notch 20% ID AX Notch Large pulse up, 90 12 degrees IM 12 dearees 0 12 dearees small pulse horizontal Span Setting 40% OD Axial Notch 40% OD Axial Notch 40% OD Axial Notch Large Pulse 1__
2 divisions 1
2 divisions
!12 divisions I
4 divisi Calibration Circumferential Sensitive Coil (Dual Probes)
Channel&
Ch. 3 & 6 Ch. 9 & 12 Ch. 16 & 20 Ch. 21 & 22 Frequency 300 kHz 200 kd-lz 100 kIHz 100 kHz (oplNmd)
Phase Rotation 20% ID Circ. Notch 20% ID Circ. Notch 20% ID Circ. Notch Puime 12 degrees 12 deareas 12 decrees Q 90 d__
Span Setting 40% OD Circ. Notch 40% OD Circ. Notch 40% OD Cirr. Notch Pulse.
_2 2 divisions L 2 divisions 2 2 divisions I
f 4 dMsions
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 11 ENTERGY SCN No.: I ANO-2 STEAM GENERATOR EDDY CURRENT Page: 60 EXAMINATION GUIDELINES Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
I Page: 2 of 5 Configuration Board Settings trI: off down Coriiguratbon:
Name: 3-Col
_sampples sc:
1280 1rec. medi, -
e r tester -
board # 1 board # 2 board # 3 boerd # 4 boardS #5 boardl 6 bosrd # 7 boar
- of channels 24 probe
- 1 probe 1
poe 2 probe 8 2 probe
- 1 probe 1
probe
- 1 Mb DRIVE DRIVE DRIVE DRIVE DRIVE DRIVE DRIVE A
D B
C A
D B
C A
D B
C A
D B
C A
D B C
A D B
C A
D BC Drive olarty N
N NNI N
N N
NN Group Number 1
1 1
1 2
2 2
2 2
4
.. 4 Coil Number 1
4 5
1 4
575 718 III FREQ O1 Time Slot 8 10 D
0 D
D D
3O0k~tz G:x2 12.OV FREQ82 Time Slotg2 D
D D
D D
D 2001d-1z G:x2 12.OV FREQ#3 TimeSlot#3 D
DO 0
D D
D 1001k G:z2 I 12.0V FREQ Time SlotA4 D
0 1001d-G:x2 12.0V_
FREQ#5 Time Slot 0 5 0
0 20k "
G:x47 12.0V FREQ #6 Time Slot # 6 FREQO7 Time*Slot#7 FREQOS Time Slot # 8 END LOC CH-1 1
DRIVE A: 0 - A1-A2, P - drA1 pu:A2,DP dr~: DI&D2 pu: A1&A2 THRESHOLD:
off off DRIVE B: D 82, A - A1-82 (P) GAIN:
xG P -dr: B1 pu:B2, ID D
dr: C1&C2 pu: 51&82 ACTIVEPROBES 2
DRIVEC:0'C1-C2 A-D10C2 DRIVE D: D 02 Special Instructions Ld, a M Lnt uW Lgmnnig or eachn calioraton group indicating that the data a being acquired with either s*ngle or dual probes. If dual probes are being used state which calibration group is the prmary probe and which is the secondary probe. The message israil include wiatheir the data is acquired on the push or pull.
2-When acquiring data with a asngle probe delete boards 3 & 4. The Coi 1 (.115" Panc) channels will then be Ch 1=300 kHz, Ch 4=200 kIz, Ch 7=100 kHz, Ch 12=20 kHz. The Coi 4 (Trhgge) channel will be Ch8=100 kHz-The Col 5 (Axial) channels wWi be Ch 2=300 kHz, Ch 5-200 kHz, Ch 9=100 kHz. The Codl 7 (Circ) channets wi" be Ch 3=300 kHz, Ch 6=200 kHz, Ch 10=100 kHz. Codl #8 wil be Ch 11 100 kHz.
- 3. Examine each location and record a run-out. Run-out record not required for tubeslteet ntersection scans.
- 4. The TS H expansion transibtin SWa be acquired by pushing the probe tirough transition and shall be adequate to cover the target IlocatN.
The scan shall normally be trom 20r below the transitio to 2(r above the top of the tubesheet. In the event that the probe stall on the push, the data may be acquired by pulling the probe through the transition. This requie the operator to message the event pror to acquiring the date..
- 5. Other locations may be scanned on the PULL or PUSH and shall be adequate to cover the target location. For specad Interews I-cation oce within a structure, the data shal be acquired +/ from the center of the structure. AN coter locations shall be acquired from structure to structure unless encoders are used, In which case the scan may include one structure. In these inatances, care should be taken to insure that the piroP location Is scanned with adequate data past the target location (recomrmewnd 5 Inche) to account for any variations in probe speed or M scalng.
- 6. One calibrtion sUtandard may be recorded at the beginning and end of each cal gro provided I Is a successful scan of the stanrxds complete legth.
- 7. Tubes which have been mis-encoded should be correted by entedng a message to void that entry and re-emining the tube h the proper e This is required to mautain an accurate DSR database.
- 8. Axiall Encoder is to be used for all specil Interest examinafions. When rot used. activate tmest as usual, aid no smw Is rwku&
ARKANSAS NUCLEAR ONE No.: HES-28 SENGINEERING STANDARD Rev. No.: 11 EfT RG IscN No.: I ANO-2 STEAM GENERATOR EDDY CURRENT Page: 61 I_ _
EXAMINATION GUIDELINES I
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
Page: 3 of 5 Data Analysis Pan ake Chainnels Channel & Frequency Ch I Ch 4 Ch 7 ChI 12 A(eato) 30DkHz 200kHz 100kHz 2D k Phase Rotation 20% IO Ax. Notch 20% ID Ax. Notch 20% ID Ax. Notch Tube Spp*W Rkig Up ft 12 degrees f 12 dees 90 12 dering @a-90
_,greme Span Setvng 40% 00 Ax. Notch 40% OD Ax. Notch 40% OD Ax. Notch Tube Suppt Rkni Minimum 1
2 divisions 2 division 2 divisions 111 Axial nsitive Call & Tri gar Channels Channel&Frequency Ch2 Ch 5 Chg Ch 8 (TIi 300 kHz 200 kHz 100kHz 1W kHz Phe Rotalmin 20% ID Ax. Notch 20% ID Ax. Notch 20% 10 Ax. Notch LaI"e Puke Up.
9b 12derees 12dese b 12 e-Stul Pula Haf Span Seating 40% OD Axal Notch 40% OD Ad Notch 40% OD Axial Notch LIre PilN Mi*nim Q 2 divisions Q2 divisions
@2 vions a4dMelons Circumferential Sensitive Channels & Encoder Channel Channel&Frequency Ch3 Ch6 Ch10 Chl 1 300 kHz 200 kHz 100 kHz I W kHz e(odef Phase Rotation 20% ID Circ. Notch 20% ID Ckro. Notch 2D% ID Circ. Notch Pulne 9112 dearess 9112 deores 112 degrees90 doomsea' Span Setting 40% OD Cic. Notch 40% 00 Ore. Notch 40% OD Cdu.
Notch Pule Minimum a 2 divisions 0 2 divisions a 2 divlsions a 4 divisions Process Channels Channel & Frequency Ch P1 Ch P2 Ch P3 N/A (See Note 5) 300/100 kHz Panc 300100 kHz Axisl 300M100 kHz CIrl Phase Rotation 20% ID Ax. Notch 20% ID Ax Notch 20% ID Circ. Notch Q 12 dewes C 12 drew J2 12 dess Span Setotng 40% OD Ax. Notch 40% OD Axial Notch 40% 00 Circ. Notch Minimum 0 2 divson2 divisions 2
2divisions Voltage Normalization Calibration Curves CH Signal (Note 13)
Set Normalize Type CH Set Points 1
100% Ax notch 20 Vp-p Ch. 4,7 & P1 (Reso) Phase Curve (Note 12) 1 40, 60, 100 Ax. 0D notch 2
100% Ax notch 20 Vp-p Ch. 5 ' 9 & P2 3
100% Circ. notch 20 Vp-p Ch. 6,10&P3 (Reso) Phase Curve Note 12) 1 40, 60,100 CirCOD notch Data Screening Left Strip Chart Right Strip Chart ussaeous P1 Ch 6I Ch P1 Reporting Requirements Condition/Region Report Ch.(Noft 11)
Comment Single Axial Indication SAI 1 or P1 Any amplitude - Report on volts peak - peek (TBR In UtlA 2)
Multiple Axial Indication MAI 1 or P1 Any amplitude - Report on volts peek - peek (TBR In UtI 2)
Single Circumferential Indication SCI 1 or P1 Any amplitude - Report on volts peak - peak (TBR Inr UtIl 2)
Multiple Circumferential Indication MCI 1 or P1 Any amplitude - Report on volits peak - peak (TBR In UtiL 2)
Single Volumetric Indication SVI 1 or P1 Any amplitude - Report on volts peak - peak (TBR In Uti 2)
Mixed Mode Indication MMI 1 or P1 Any amplitude - Report on volts peak - peak (TSR In UtU 2)
Possible Loose Part PIP 12 Any Indication of Secondary Side Foreign Parts Volumetric VOL I orP1 Any amplitude - Report on volts peak - peak Loose Part Indication LPI P1 Any Indication of tube degradation associated W PLP (see I Note15) (TBR In Util 2)
Multiple Volumetric Ind.
MVI 1 or P1 Any amplitude - Report on volts peek-peek (TBR in UW 2)
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 11 ENTERGY SCN No.: I ANO-2 STEAM GENERATOR EDDY CURRENT Page: 62 1_
EXAMINATION GUIDELINES I
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
I I Page: 4 of 5 Special Instructions
- 1. Refer to Appendix II additional instructions regarding the data screening and evaluation of RPC Probe data.
- 2. All phase rotation settings am set with indications going up
- 3. Rotate data using "Data Slew Menu" so coils 5 and 7 are aligned with coil 1.
- 4. Span, Phase, and Volts are to be set using the center of the notch.
- 5. Process Channel P1, P2 and P3 shall be created to aid in the evaluation of Indications that may be masked by deposits. Suppress the tube support ring on the calibration standard using the signal response from one complete revolution of the support ring. After suppression check the standard to make sure all flaws are not distorted by the suppression process.
- 6. Evaluate the full length of the recorded data.
- 7. Plot tubesheet Interfaces with Channels 1, 2 and 3 as a minimum.
- 8. Volumetric (MBM) calls at the top of the tubesheet may represent mixed mode cracking. Indications should be investigated to determine that cracking is not present prior to accepting a MBM call.
- 9.
Monitor the configuration widget for proper data sampling. Set the warning dialog to trigger at 25 axial samples and 30 circumferential samples. When these requirements are not met in the area of Interest, reject the data and notify the Lead.
- 10. When the c-scan plot area is set to +/-1.0" there should be a minimum of 50 scan lines and 72 data points per scan line.
- 11. Label channels 1,4, 7 and P1 "Panc*. Label channels 2, 5, 9 and P2 as"Axial'. Label channels 3, 6, 10 and P3 as"Circ'. Label channel 8 as Triggo. Label channel 11 as "AxEn'. Label channel 12 as 'Loc3.
- 12. Resolution as required will size, on best effort basis, each reported indication. Two phase angle calibration curves will be required. One for axial Indications and one for circumferential indications. These calibration curves will be developed Inside the RPC c-scan window.
- 13. When the 100% EDM notch saturates on specific channels, use the 60% ID notch and set to 7.0 volts for these channels.
- 14. This configuration can be used with a single pancake coil.
- 15. Any bobbin PLP call shall be rotated and compared to the previous outage inspection. If the PLP was called last outage, the bobbin signal shall be compared and any change >10 degrees phase angle on P1 shall be reported as an LPI and repaired.
- 16. Reporting from the directed coils (axial, crc) is allowable when the pancake coil does not produce a good signal.
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 11 is I SCN No.: I ENTERGY ANO-2 STEAM GENERATOR EDDY CURRENT Page: 63 1_____
EXAMINATION GUIDELINES I
_I I
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
Page: 5 of 5 Resolution Sizing Methodology of Indications for Enqineerinq Evaluation SG ROW COL VOLTS DEG PCT CHAN LOCATION FROM TO EXTENT UTILI Volumetric Indication (SVI,
- MVI, MMI, LPI) 1 Indications will be measured using the 300 kHz pancake coil. If other frequencies or coils give a better representation of the indication it may be used. Depth measurements will be estimated from the phase angle calibration curve using the deepest hit or the most representative estimate.
The most representative estimate is that derived from multiple hits, which display close correlation, and only one hit is greatly different.
2 Linear (crack-like) indications require a length measurement.
The measurement will be taken from the C-SCAN strip chart using the To/From measurement feature. Multiple scan lines shall be reviewed to insure a conservative measure.
3 Volumetric indications require length and width measurement. Set the threshold just above baseline and adjust the box to the size of the positive image. Set the OD (.750")
for tube diameter in C-SCAN "users select".
4 In the Circ and Axial Liss windows of the C-SCAN "set volts units" to "use main eddy voltage".
5 Report SVI,
- MVI, VOL,
- SAI, MAI from Circ Liss. Report SCI, MCI from Axial Liss.
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L HI t - 1 UO.8 26. It 8.4.0 10 44 0p00521 003 IN SID s75 DIA LJ 0073003 IN4 510 >75 J1A MA-T ERAL AVERAGE MEAS WALL 111K -051 HEAT LOT NO i~.
TEST rFR-SO-H o Nro
_______1-4 ShO(WS 100%6 SHIOWS 60% ID si iOWS 60% GD.
SHOWS 10% ID.
AXIAL FLAW CiRC FL.AW AXIAL. FLAW CIRC FLAW LOGOD LOct.)
LOC F LOC-1 LOC A 1.0C C LOC E10001 SI-lOWS 100%o Sl owS 1u0%
si ow.S 60% I D SI lows 60% 00D SH-OWS 40% ID.
THRIJ liaE CIRC FLAW AXIAL FLAW OIRO FLAWI AILFA REL NO NOTE OUALITY REL NO DATE MFG,________
O A INSP CUSTOMAER RECCIRDED t
L PRLCEE USED-
.4 V1IqnSE35;EU1FT-tr5-AYtI 1t)LERAIIKES
-ECIlMAL FRACI 1 1116 fxxx 6.003 NX 050
.300)
Mgi ll 000 KZECKE T 0 DELL DJE 5:014 APYD CIA O.A
'.2/03/195 12110196
,2/10/96 12110196 l FP4 cxHOln I.a.
OnAFT.
ERROR KZIT i
LO00AT 101 SH-OWS 40% 0D.
AXIAL FLAW 100 J SH-1W3 40% GD.
CIRO. FLAW ZETEC
.i~i 0.1. CALIBRATION STANDARD Dtu404LO--A Ptu)L)5 uw u2-415-1059
(
K L
m N
i THRU HOLtE LOO N ORIENT AT ION OF: ALL FLAWS1 SHOWS 20% 1 D CIRC FLAW LOCL LOC M SHOWS 20% 1ID AXIAL FLAW 1027- -Acro%
11
10.2 ATTACHMENTS 10.4.1 ATTACHMENT I - ETSS #1 Bobbin Examination Examination Technique Specification Sheet ETSS # I - BOBBIN PROBE Page: 1 of 4 Site: Entergy Operation Inc. Arkansas Nuclear One Unit #2 Examination Scope Applicability: Standard ASME Code Examination. Use for detection of IGAJODSCC at non-dented drilled and eggcrate support structures, in freespan tubing and within sludge pile region. This technique includes the detection and sizina] of wear diaaonal and vertical straos usina differential 400/100-amnlituide mix dee to an of wear. diao a
ve tia
""uiadfer nil4 0 1 0-l Instrument Tubing Manufacturer/Model: Zetec MIZ-30A or Equiv.
Material Type: Inconel 600 Data Recording Equipment ODM/all (inch): 0.750" OD X 0.048 Wall Manuf./Media: HP HD 1.3Gb Optical or Equiv.
Calibration Standard Software Type: ASME with Fan Bar Wear and EDM Manufacturer: Zetec Analog Signal Path Version/Revision: EN 98, Latest Approved Version Probe Extension Manuf.: Zetec Examination Procedure Extension Type & Length: Universal 945-1760, 75 ft.
Number/Revision: HES-28 Rev. 9 Slip Ring Model Number: 508-2052 Scan Parameters Scan Direction: Pull Digitization Rate, Samples Per Inch (minimum):
Axial Direction
_33 Circ. Direction N/A Probe Speed Sample Rate RPM Set RPM Min RPM Max
<48 IPS 1777 N/A N/A N/A
- 24 IPS 1100 N/A N/A N/A Probe Description (Model/Diameter/Coil Dimensions)
Manufacturer/Part Number Length A-600-M/ULC Zetec 700-1192-061 110 ft.
A-540-SF/RM / A-560 SF/RM I A-580-SF/RM Zetec 754-0402-001/D#2121-10-B/700-110 ft.
0402-051 A-600-M/ULC (500 nose)
Zetec D# 2120-5-G 110 ft.
Data Acquisition Calibration Differential Channels Channel&
Ch. 1 &3 Ch. 5&7 Ch. 9& 11 Ch. 13& 15 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation 100% TWH 100% TWH 100% TWH Tube Support Ring 40 degrees 40 degrees 40 degrees 90 Degrees Span Setting 100% TWH 100% TWH 100% TWH Tube Support Ring 6 divisions 6 divisions 6 divisions 5 divisions Calibration Absolute Channels Channel&
Ch. 2 & 4 Ch. 6 & 8 Ch. 10 & 12 Ch. 14 & 16 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Tube Support Ring Flaws up first Flaws up first Flaws up first 90 Degrees Span Setting 60% TWH 60% TWH 60% TWH Tube Support Ring 5 divisions 5 divisions 2 divisions 4 divisions ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 9 ENT G
IPage: 1 ANO-2 STEAM GENERATOR EDDY CURRENT I_
EXAMINATION GUIDELINES
Examination Technique Specification Sheet ETSS # 1 - BOBBIN PROBE Page: 2 of 4 Configuration Board Settings tng: off I down Corkjration# 0 Name I sa m e/sec/
rec media=
tester =
board # 1 board # 2 board # 3 board # 4 board # 5 board # 6 board # 7 Iboard # 8
- of ciannels=
16 probe # 1 probe # 1 robe # 2 rxobe # 2 xobe # 1
- xobe#1 crobe# 1 prote # 1 ERRVE DRIVE CRIVE DRIVE DRVE MRVE DRIVE DRVE A D B C A D B C A D B C A D B C A D B C A D B C A D B C A D B C Dnve PolarftyN NN N
Group Nume 1
1 22!
CoiI Nurnber 4
1+
FREQ #1 Time Slot # 1 400kI&
G x2 120V D
A D
A FREQ #2 Time Slot # 2 2000Hz-t G:x2 120V A
D A
FREQ #3 Time Slot # 3 1D0kOz-G:x2 120V D
A D
A FREQ #4 Time Slot # 4 20klz G x4 i 120V D
A D
A FREQ#5 Tme Slot#5 FREQ #6 Time Slot # 6 FREQ#7 Time S#7 1
FREQ #8 T"ime Slot # 8 END LOC CH 1
1 DRIVE A D A1-P= ApA2,DP =dr: D1&D2 pu: Al&A2 v'>
THRESHOLD Off Off DRIVEB D=B1-E2,A-A1-B2P' (P) GAIN x6 P=dr:B1pu:B2,DP=d Cl&C2pu* BI&B2 ACTIVE PROBES 2
DERVE C: D = Cl-C2, A = D1-C2 Garn SeM DRIVE D: D= D1-DQ2 Special Instructions I
nI e A-6UU-M/ULLC prooe is the primary use probe tor the bobbin examination. The A-580SF/RM and A-560SF/RM are used to test low row tubes 2
The A-580-SFRM probe can be used in tubes reported as RRT with the.600" probe as directed by the FTI Level Ill and Entergy approval. If needed, a 0.560 SF/RM probe, or a 0.540 SF/RM can be used as directed by the FTI Level III and Entergy approval
- 3.
Examine each tube full length or to the extent possible
- 4.
Enter a message at the beginning of each calibration group indicating that the data is being acquired with either single or dual probes. If dual probes are being used state which calibration group is the primary probe and which is the secondary probe.
5 When acquiring data with a single probe Coil 1 (differential) channels will be Ch1=400 kHz, Ch3=200 kHz, Ch5=100 kHz, Ch7=2OkHz and the Coil 5 (absolute) channels will be Ch2=400 kHz, Ch4=200 kHz, Ch6=100 kHz, Ch8=20 kHz 6
Slower speeds (24 IPS) are recommended in the smaller radius U-bend tubes (row 5 and below) due to probe snapping through the U-bend.
- 7. Three recordings of the calibration standard should be performed at the beginning and end of each calibration group 8
As a minimum, a position verification and a message will be entered once per calibration group.
9 Tubes, which have been mis-encoded, should be corrected by entering a message to void that entry and re-examining the tube with the proper encode. This is required to maintain an accurate DSR database.
ARKANSAS NUCLEAR ONE Aft_
ENGINEERING STANDARD No.: HES-28 S
Rev. No.: 9 ANO-2 STEAM GENERATOR EDDY CURRENT Page: 2 EXAMINATION GUIDELINES SCN No.: I
- CN-
ARKANSAS NUCLEAR ONE dh ENGINEERING STANDARD No.: HES-28 B
Rev. No.: 9 ANO-2 STEAM GENERATOR EDDY CURRENT Page: 3 EXAMINATION GUIDELINES SCN No.: 1 Examination Technique Specification Sheet ETSS # I -
BOBBIN PROBE Page: 3 of 4 Data Analysis Calibration Differential Channels Channel&
Ch I Ch 3 Ch 5 Ch 7 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation 100% TWH 100% TWH 100% TWH Tube Support Ring
@ 40 degrees Q 40 degrees
@ 40 degrees
@ 90 Degrees Span Setting 100% TWH 100% TWH 100% TWH Tube Support Ring Minimum
@ 75% FSH
@ 75% FSH Q 75% FSH
@ 50% FSH Calibration Absolute Channels Channel&
Ch 2 Ch 4 Ch 6 Ch 8 Frequency 400 kHz 200 kHz 100 kHz 20 kHz Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
100% TWH Tube Support Ring Flaws Up Flaws Up
@ 40 Degrees 270 Degrees Span Setting 60% TWH 60% TWH 60% TWH Tube Support Ring Minimum
@ 50% FSH
@ 50% FSH
@ 20% FSH
@ 40% FSH Calibration Process and Other Channels Channel &
P1 (Ch 1/5)
P2 (Ch 1/5)
P3 (Ch 1/3/5 turbo)
N/A Frequency 400/100 kHz Diff 400/100 kHz Diff 400/200/100 kHz Diff Configure & Adjust Suppress Suppress Save 100, 60, 20 Parameters Support Ring Support Ring Suppress TSP TSH &
TSC Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Flaws start down Flaws start down Flaws start down Span Setting 100% TWH 50% Wear 100% TWH Minimum
@ 75% FSH
@ 50% FSH
@ 50% FSH Voltage Normalization Calibration Curves CH Signal Set Normalize Type CH Set Points 1
4X20% FBH 4 Vp-p All Phase 1, 3, 5, P1, 100, 60, 20 FBH Magnitude (Vmax)
P2 0, 30, 50 Wear Data Screening Left Strip Chart Right Strip Chart Lissajous P1 Ch 6 Ch P1 Re orting Requirements Condition/Region Report Ch.
Comment Absolute Drift ADI 6
Vert-Max (Low Row U-bend)
Freespan DFI
-+
Use "Free Span Bobbin Coil Indication Flow Chart' Eggcrates DSI P1 See Note 6 Drilled Support Plates DSI P1 See Note 7 Batwings DSI P1 See Note 9 Tubesheet DTI P3 See Note 4 Dents DNT P1 All Dent Indications > 3 volts located anywhere.
Indication Not Reportable INR Indications detected are not reportable by guidelines Indication Not Found INF Resolution is require to research and resolve per guidelines Wear DSI P2 Indications with no history. See Note 9.
Wear P2 Vert-Max Differential At the Batwing edges only. Check contact. See Note 9.
Possible Loose Part PLP 8
Any Indication of Secondary Side Foreign Parts, See Note 12 Loose Part Indication LPI P1 See Note 12 3CN-
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 9 Page: 4 ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: I I__
EXAMINATION GUIDELINES I
_I Examination Technique Specification Sheet ETSS # 1 -
BOBBIN PROBE I
7Page: 4of4 Special Instructions
- 1.
Refer to Appendix I additional instructions regarding the data screening and evaluation of Bobbin Probe data.
- 2.
Zoom the strip chart to a maximum value of 8 to increase visibility of small amplitude indications.
- 3.
All areas of the tubing should be examined with both P1 and Ch6 for distortion at structure and/ or drifts that may be indicative of cracking.
- 4.
Review tubesheet data for indications of degradation, distortion and drifts indicative of axial or circumferential cracking. Indications may be confirmed by using Ch5, Ch6 or P3. Evaluation is typical in P1 or Chl. Based upon experience at ANO-2, take care to examine the entire tubesheet entry signal at the setup span on Chl and Ch3 for distorted signals indicative of cracking. Also observe the response of P3. The requirement to screen the entire SCN tubesheet entry signal is critically important in both the hot leg and cold leg. Distorted signals, which may be
-1 indicative of a flaw on the bobbin, shall be flagged for RPC examination by reporting as DTI in the % column. If the indication is not in the expansion transition, the indication should be evaluated and reported from P1.
- 5.
In the presence of deposits at the top of the tubesheet, if the signal has the characteristics of a flaw on P1, report these indications as an *NQI" code and test with an RPC examination.
- 6.
Evaluate each support on the P1 process channel. Eggcrates typically have three signals representing the two edges and the center of the eggcrate. Indications can be confirmed with Chl, 3, or 5 when deposit influence is not present. Indications that are phased in the ID plane on P1 should confirm on Ch3 and/or Ch5. Indications may not always display an expected counter-clockwise rotation.
- 7.
Dented drilled supports should be screened with P1 and P3. P3 indications must confirm as an indication on either Chl, Ch3, or Ch5.
- 8.
Using P1 and Ch5 to scroll through the upper hot leg area from 07H through the u-bend region. Also evaluate this using the Ch6 strip chart for drift indications. Evaluation is typically on P1, Ch5 and Ch6. Monitor the 100 kHz absolute strip chart for positive drift (special attention to the low row u-bends).
- 9.
Wear or fretting indications at the Batwings should be evaluated and called using P2. If the indication does not have history record as a DSI. If the indication has history record %TW. Confirmation of a contact point is made by using Ch8. If the indications are not on a contact point or are sharp and not typical of wear, evaluation should be made using P1 and report as DSI.
- 10. When using Auto Calibration features, make sure that you are using the file that matches the Standard being used.
- 11. Monitor the configuration widget for proper data sampling. Set the warning dialog to trigger at 33 axial samples.
- 12. Observe the stripchart and Lissajous presentations for indications occurring anywhere along the tube but especially on top of the tubesheet and supports. Possible loose parts shall be screened and reported as a Possible Loose Part (PLP) on 20 kHz absolute. This will signify the need for further characterization with a rotating probe technique.
il 6052 IN ST0 1 0775 6087 IN STD - 075 LOCATION PHYSICALLY MEAS DEPTH DEPTH IN % OF WALL A
B
... s.
.20 5 5J%01 E T PHASE ANGLE MEAS C
D E
F G
H Th"L=5'.u=5° 4SU72 0 3/16 0 7/64 nl DIA OF DEFECT
,003 2-501270 250120
-DELRIN SPACER TUBE SUPPORT RING MATERIAL C S 12L14
('0 LOC A & B I
\\
SHOWSAWEARSCAR MATERIAL AVERAGE MEAS WALL THK
.+/-..5 NOMINAL WALL THK
, olig HEAT LOT NO ISZ.OIAMm36Y Oss. IA*L.*
TEST FRED USED 430 MMM-:
SRIAL NO M -1sSto 00 NO __
_los"_
L NO ML A*UITY REL. NO ATE MFG kk INSP*
TOMER @RI*3042SEUKm:*4
- EUSEDO d 'L"-
0-11 4-C-LOC C 0 SHOWS Z-FLAWS EQUALLY SPACED AROUND TUBE LOC F THRU H 0
SHOWS OD AXIAL EDM NOTCH 250 LONG X 006 MAX WIDE OT I
LOCI LOC J 0
0 SHOWS 360' DENT SHOWS 360* COPPER RING 75 WiDE X 007.002 DP 250 WIDE X 003 THK LOC K SHOWS 4X ED SPACED (g0"APART EGG CRATE SIMULATION 2-416-1016 MATERIAL CS 12L10 K
10.4.2 ATTACHMENT II - ETSS #2 RPC Examination (Pancake, Ax, and Circ)
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. Directed coils)
Page: 1 of 5 Site: Entergy Operation Inc. Arkansas Nuclear One Unit #2 Examination Scope Applicability: Tubesheet examinations. Diagnostic testing and/or to confirm bobbin indications. Detection of IGA/ODSCC or PWSCC.
Instrument Tubing Manufacturer/Model: Zetec MIZ-30A/30-8 Material Type: Inconel 600 Data Recording Equipment OD/Wall (inch): 0.750' OD X 0.048" Wall Manuf./Media: HP HD 1.3GbOptical or Equiv.
Calibration Standard Software Type: RPC EDM Notch Standard Manufacturer: Zetec Analog Signal Path Version/Revision: EN98 Latest Approved Version Probe Extension Manuf.: Zetec Examination Procedure Extension Type & Length: Universal 945-1760, 75 ft.
Number/Revision: HES-28 Rev. 9 Slip Ring Model Number 508-2052 Scan Parameters Scan Direction: Push or Pull Digitization Rate, Samples Per Inch (minimum):
Axial Direction
- _25 Circ. Direction 2!30 Probe Speed Sample Rate RPM Set RPM Min RPM Max 0.45 in/sec. 1280 850 700 1000 Probe/Motor Unit Description (Model/Diameter/Coil Dimensions)
Length Motor Units 810-4090-000 -.610 (.115) MRPC 3C-52PH 50' or 83' 700-4055-071 -.610 9D-MRPC-52MU D# 2651-2-A -.580 (.115) MPRC 3C-52PH 50' or 83' 810-4050-001 -. 560 9D-MRPC-52MU D#3414-13-A -.600 TTS extension shaft (+2'/-2") 48' Data Acquisition Calibration 0.115 Coil Channels (Dual Probes)
Channel&
Ch. 1 &4 Ch. 7 & 10 Ch. 13 & 17 Ch. 23 & 24 Frequency 300 kHz 200 kHz 100 kHz 20 kHz Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Tube Support Ring Up Flaws up first Flaws up first Flaws up first j
90 degrees Span Setting 40% OD Axial Notch 40% OD Axial Notch 40% OD Axial Notch Tube Support Ring 0 3 divisions ft 3 divisions (M 3 divisions 0- 3 Divisions Calibration Axial Sensitive Coil and Trigger Channels (Dual Probes)
Channel&
Ch. 2 & 5 Ch. 8 & 11 Ch. 15 & 19 Ch. 14 & 18 Frequency 300 kHz 200 kHz 100 kHz 100 kHz Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Large pulse up, Flaws up first Flaws up first Flaws up first small pulse horizontal Span Setting 40% OD Axial Notch 0 3 divisions 40% OD Axial Notch 0- 3 divisions 40% OD Axial Notch 0- 3 divisions Large Pulse ft 4 divisions Calibration Circumferential Sensitive Coil (Dual Probes)
Channel&
Ch. 3&6 Ch. 9 & 12 Ch. 16 & 20 Ch. 21 & 22 Frequency 300 kHz 200 kHz 100 kHz 100 kHz (optional)
Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Pulse Flaws up first Flaws up first Flaws up first
@ 90 degrees Span Setting 20% ID Circ. Notch 20% ID Circ. Notch 20% ID Circ. Notch Pulse (5_ 2 divisions (M 2 divisions
( 2 divisions et 4 divisions ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 9 Page: 5 ENTEBG(
ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: 1, 2, 4 1__
EXAMINATION GUIDELINES I
3CN
'CN-
-J
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
IPage:
2 of 5 Configuration Board Settings trig off down Configuration # 0 Name Dual 3-Coil Isamples I sec. 1280 rec. media =
Har tester=
board # 1 board # 2 board # 3 board # 4 board # 5 board # 6 board # 7 boa
- of channels 24 probe # 1 probe # 1 probe # 2 probe 1
probe # 1 probe # 1 roo#
DRIVE DRIVE DRIVE DRIVE DRIVE DRIVE DRIVE A
D 8 C A
D B
C A
D B
C A
D B
C A
D B
C A
D B
Cý A D
B CA Drive Polarity N
N N
N N
N N
N IN IN Group Number 1
1 1
1 1
2L 2
2 2
Coil Number 1
4 5
7 8
1 5
7 8
FREQ #1 Time Slot # 1 D
D D
D D
D 3W0kHz G x2 120V FREQ #2 Time Slot # 2 D
D D
D D
D 20OkHz G: x2 1120V FREQ#3 TimeSlot#3 D
D D
D D
D D
D 100kHz G x2 120V FREQ#4 TimeSlot#4 D
D 100kHz G x2 120V FREQ#5 TimeSlot#5 D
D 20 kHz G x4 1 120V FREQ #6 Time Slot #
6 FREQ #7 Time Slot # 7 1
FREQ #8 Time Slot # 8 END LOC CH.
1 1
DRIVEA: D=Al -A2.
P =drA1 puA2,DP dr 01&D2 pu A1&A2 IN1\\00 THRESHOLD:
off off DRIVE B: D = 81-B2, A = Al-82 (P) GAIN x6 P =dr :B1 pu82, DP =dr C1&C2 pu B1&B2 ACTIVE PROBES 2
DRIVE C D = C1-C2, A D1-C2
`baiw DRIVED D = D1-D2 Special Instructions
=Iiier a message at the beginning of eacn caioration group indicating that the data is being acquired with either single or dual probes If dual probes are being used state which calibration group is the primary probe and which is the secondary probe. The message shall include whether the data is acquired on the push or pull 2
When acquring data with a single probe delete boards 3 & 4 The Coil 1 (.115" Panc) channels will then be Ch 1 =300 kHz Ch 4=200 kHz Ch 7=100 kHz, Ch 12=20 kHz The Coil 4 (Trigger) channel will be Ch8=100 kHz The Coil 5 (Axial) channels will be Ch 2=300 kHz, Ch 5=200 kHz, Ch 9=1 00 kHz The Coil 7 (Circ) channels will be Ch 3=300 kHz, Ch 6=200 kHz, Ch 10=100 kHz. Coil #8 will be Ch 11 100 kHz 3
Examine each location and record a run-out. Run-out record not required for tubesheet intersection scans.
4 The TSH expansion transition shall be acquired by pushing the probe through transition and shall be adequate to cover the target location. The scan shall normally be from 2.0" below the transition to 2.0" above the top of the tubesheet. In the event that the probe stalls on the push, the data may be acquired by pulling the probe through the transition. This will require the operator to message the event prior to acquiring the data.
5 Other locations may be scanned on the PULL or PUSH and shall be adequate to cover the target location. For special interest indications located within a structure, the data shall be acquired +/-Z from the center of the structure. All other locations shall be acquired to include a minimum of one structure. Care should be taken to insure that the proper location is scanned with adequate data past the target location to account for any variations in probe speed or axial scaling 6
One calibration standard may be recorded at the beginning and end of each cal group provided it is a successful scan of the standards complete length
- 7.
Tubes which have been mis-encoded should be corrected by entering a message to void that entry and re-examining the tube with the proper encode. This is required to maintain an accurate DSR database
- 8. Axial Encoder is used at the oerator's discretion. When not used, activate timeslot as usual, and no setup is required ARKANSAS NUCLEAR ONE No.: HES-28 SENGINEERING STANDARD Rev. No.: 9 SPage: 6 ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: 1,2,4 1_
EXAMINATION GUIDELINES I
ARKANSAS NUCLEAR ONE No.: HES-28 SENGINEERING STANDARD Rev. No.: 9 Page:
BJ1BRG ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: 1, 2 1____
_ EXAMINATION GUIDELINES I
_I Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
Page: 3 of 5 Data Analysis Pancake Channiels Channel & Frequency Ch 1 Ch 4 Ch 7 Ch 12 (Locator) 300 kHz 200 kHz 100 kHz 20 kHz Phase Rotation Probe Motion Horiz.
Probe Motion Horiz.
Probe Motion Horiz.
Tube Support Ring Up Flaws Up Flaws Up Flaws Up
& 90 degrees Span Setting 40% OD Circ. Notch 40% OD Circ. Notch 40% OD Circ. Notch Tube Support Ring Minimum 1
2 divisions 1
2 divisions 1
2 divisions 0 3 Divisions Axial nsitive Coil & T"c aer Channels Channel & Frequency Ch 2 Ch 5 Ch 9 Ch 8 (Trigger) 300 kHz 200 kHz 100 kHz 100 kHz Phase Rotation Probe Motion Hornz.
Probe Motion Horiz.
Probe Motion Horiz.
Large Pulse Up, Flaws Up Flaws Up Flaws Up Small Pulse Horiz.
Span Setting 40% OD Axial Notch 40% OD Axial Notch 40% OD Axial Notch Large Pulse Minimum
@ 2 divisions
@ 2 divisions Q 2 divisions
@ 4 divisions Circumferential Sensitive Channels Channel & Frequency Ch3 Ch6 Ch 10 Ch 11 300 kHz 200 kHz 100 kHz 100 kHz (optionanl Phase Rotation 20% ID Circ. Notch 20% ID Circ. Notch 20% ID Circ. Notch Pulse degrees 0 10 degrees 0 10 degrees 0 90 degrees Span Setting 40% OD Circ. Notch 40% OD Circ. Notch 40% OD Circ. Notch Pulse Minimum 0- 2 divisions 0 2 divisions 0- 2 divisions 0 4 divisions Process Channels Channel & Frequency Ch P1 Ch P2 Ch P3 3001100 kHz Panc 300/100 kHz Axial 300/100 kHz Circ Phase Rotation Probe Motion Horiz.
r Probe Motion Horiz.
rl H
20% ID Circ. Notch Span Setting 40% OD Circ. Notch 40% OD A)dal Notch 40% OD Circ. Notch Minimum 2 divisions 0 2 divisions 2 divisions Voltage Normalization Calibration Curves CH Sianal Set Normalize Type CH Set Points 1
100% Ax notch 20 Vp-p Ch. 4,7 & P1 (Reso) Phase Curve (Note 12) 1 40, 60, 100 Ax. OD notch 2
100% Ax notch 20 Vp-p Ch. 5,9 & P2 3
100% Circ. notch 20 Vp-p Ch. 6,10 & P3 (Reso) Phase Curve (Note 12) 1 40, 60,100 Circ OD notch Data Screening Left Strip Chart Right Strip Chart Lissajous P1 Ch 6 Ch P1 Reporting Requirements Condition/Region Report Ch.
Comment Single Axial Indication SAI 1 or P1 Any amplitude - Report on volts peak - peak Multiple Axial Indication MAI 1 or P1 Any amplitude - Report on volts peak - peak Single Circumferential Indication SCI 1 or P1 Any amplitude - Report on volts peak - peak Multiple Circumferential Indication MCI 1 or P1 Any amplitude - Report on volts peak - peak Single Volumetric Indication SVI 1 or P1 Any amplitude - Report on volts peak - peak Mixed Mode Indication MMI 1 or P1 Any amplitude - Report on volts peak - peak Possible Loose Part PLP 12 Any Indication of Secondary Side Foreign Parts Volumetric VOL I or P1 Any amolitude - Reoort on volts oeak - oeak Loose Part Indication LPI P1 Any Indication of tube degradation associated w/ PLP (see note16)
Wear WAR P1 Any amplitude at Batwings only Multiple Volumetric Ind.
MVI 1 or P1 Any amplitude - Report on volts peak-peak
Examination Technique Specification Sheet ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
Page: 4 of 5 Special Instructions
- 1. Refer to Appendix II additional instructions regarding the data screening and evaluation of RPC Probe data.
- 2.
All phase rotation settings are set with indications going up
- 3. Rotate data using *Data Slew Menu* so coils 5 and 7 are aligned with coil 1.
- 4. Span, Phase, and Volts are to be set using the center of the notch.
3,CN-
- 5.
Process Channel P1, P2 and P3 shall be created to aid in the evaluation of indications that may be masked by deposits. Suppress the tube support ring on the calibration standard. Care should be taken when choosing the area that will be suppressed to develop these process channels. After suppression check the standard to make sure all flaws are not distorted by the suppression process.
- 6. Evaluate the full length of the data taken.
- 7.
Plot tubesheet interfaces with Channels 1 and 3 as a minimum.
- 8. Volumetric (MBM) calls at the top of the tubesheet may represent mixed mode cracking. Indications should be investigated to determine that cracking is not present prior to accepting a MBM call.
- 9.
Monitor the configuration widget for proper data sampling. Set the warning dialog to trigger at 25 axial samples and 30 circumferential samples. When these requirements are not met in the area of interest, reject the data and notify the Lead.
- 10. When the c-scan plot area is set to +/-1.0" there should be a minimum of 50 scan lines and 72 data points per scan line.
- 11. Label channels 1,4, 7 and P1 'Panc". Label channels 2, 5, 9 and P2 as"Axial". Label channels 3, 6, 10 and P3 as"Circ". Label channel 8 as "Trigg". Label channel 11 as "AxEn". Label channel 12 as "Loc".
- 12. Resolution as required will size, on best effort basis, each reported indication. Two phase angle calibration curves will be required. One for axial indications and one for circumferential indications. These calibration curves will be developed inside the RPC c-scan window.
3CN..
- 13. For alternate voltage normalization, use the 60% ID notch and set to 7.0 volts.
- 14. For data acquired without the axial encoder configuration, no setup is required.
- 15. This configuration can be used with a single pancake coil.
- 16. Any bobbin PLP call shall be rotated and compared to the previous outage inspection. If the PLP was called last outage, the bobbin signal shall be compared and any change >10 degrees phase angle on P1 shall be reported as an LPI and repaired.
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 9 Page: 8 E
F ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: 1, 2 1____
_ EXAMINATION GUIDELINES I
_I
ARKANSAS NUCLEAR ONE No.: HES-28 ENGINEERING STANDARD Rev. No.: 9 Page: 9 B4TEMY ANO-2 STEAM GENERATOR EDDY CURRENT SCN No.: 1, 5 EXAMINATION GUIDELINES Examination Technique Specification Sheet I
ETSS # 2 - PANCAKE COIL (axial and circ. directed coils)
Page: 5 of 5 Resolution Sizing Methodoloqy of Indications for Engineering Evaluation SG ROW COL VOLTS DEG PCT CHAN Circumferential Indication (SCI, MCI)
Volumetric Indication (SVI, MVI)
LOCATION FROM TO EXTENT UTILI UTIL2 Indications will be measured using the 400 kHz pancake coil.
If other frequencies give a better representation of the indication it may be used.
Depth measurements will be estimated from the phase angle calibration curve using the deepest hit or the most representative estlmate.
The most representative estimate is that derived from multiple hits, which display close correlation, and only one hit is greatly different.
- 2.
Linear (crack-like) indications require a length measurement.
The measurement will be taken from the C-SCAN strip chart using the To/From measurement feature. Multiple scan lines shall be reviewed to insure a conservative measure.
- 3.
Volumetric indications require length and width measurement.
Set the threshold just above baseline and adjust the box to the size of the positive image.
Set the OD (.750")
for tube diameter in C-SCAN "users select".
- 4.
In the Circ and Axial Liss windows of the C-SCAN "set volts units" to "use main eddy voltage".
- 5.
Report SVI,
- MVI, SAI, MAI from Circ Liss. Report SCI, MCI from Axial Liss.
PROCJWORK PLAN NO.
PROCEDURE/WORK PLAN TITLE:
PAGE:
4 of 114 2203.012A ANNUNCIATOR 2K01 CORRECTIVE ACTION CHANGE:
021-03-0 0 denotes reflash capability
PROCJWORK PLAN NO.
PROCEDURE/WORK PLAN TITLE:
PAGE:
68 of 114 2203.012A ANNUNCIATOR 2K01 CORRECTIVE ACTION CHANGE:
021-03-0 ANNUNCIATOR 2K01 A-10 CONT CENTER 2D01 UNDERVOLT 1.0 CAUSES 1.1 2D01 bus voltage *110 VDC (relay 27-2D01).
2.0 ACTION REQUIRED 2.1 Check 2D01 voltage on Computer Point (E2D01).
2.2 Check Battery Bank (2D-11) amps and voltage.
2.3 Check 2D11 Battery Charger (2D-31A or 2D-31B) amps and voltage.
2.4 IF battery charger amps are high AND 2D11 is discharging, THEN secure unnecessary 2D01 loads.
2.5 Refer to Loss of 125 VDC (2203.037).
2.6 Check for overloads or multiple grounds (both positive and negative).
2.7 Refer to Tech Specs 3.8.2.3 and 3.8.2.4.
2.8 IF BOTH of the following occur:
"* 2D01 Bus Undervoltage alarm valid
"* Original Steam Generators (OSGs) installed THEN direct the Dedicated Cross-tie Operator (DXO) to obtain SDS02, EMERGENCY POWER FOR UNIT 2 ECCS VENT VALVES AND proceed to Corridor 340.
2.9 IF ALL of the following occur:
"* 2D01 Bus Undervoltage alarm valid
"* Original Steam Generators (OSGs) installed
"* At least 5 available CETs above 800°F
"* A sustained Loss of ALL Feedwater has occurred THEN Control Room Staff implement SDS02, Section 2
" Powering 2CV-4698-1 from Vital Bus 2D26".
3.0 TO CLEAR ALARM 3.1 Raise bus 2D01 voltage above setpoint.
4.0 REFERENCES
4.1 E-2451-2A
PROCJWORK PLAN NO.
PROCEDUREIWORK PLAN TITLE:
PAGE:
86 of 114 2203.012A ANNUNCIATOR 2K01 CORRECTIVE ACTION CHANGE:
021-03-0 ANNUNCIATOR 2K01 A-Il CONT CENTER 2D02 UNDERVOLT 1.0 CAUSES 1.1 2D02 bus voltage *110 VDC (relay 27-2D02).
2.0 ACTION REQUIRED 2.1 Check 2D02 voltage on Computer Point (E2D02).
2.2 Check Battery Bank (2D-12) amps and voltage.
2.3 Check 2D12 Battery Charger (2D-32A or 2D-32B) amps and voltage.
2.4 IF battery charger amps are high AND 2D-12 is discharging, THEN secure unnecessary 2D02 loads.
2.5 Refer to Loss of 125 VDC (2203.037).
2.6 Check for overloads or multiple grounds (both positive and negative).
2.7 Refer to Tech Specs 3.8.2.3 and 3.8.2.4.
2.8 IF BOTH of the following occur:
"* 2D02 Bus Undervoltage alarm valid
"* Original Steam Generators (OSGs) installed THEN direct the Dedicated Cross-tie Operator (DXO) to obtain SDS02, EMERGENCY POWER FOR UNIT 2 ECCS VENT VALVES AND proceed to Corridor 340.
2.9 IF ALL of the following occur:
"* 2D02 Bus Undervoltage alarm valid
"* Original Steam Generators (OSGs) installed
"* At least 5 available CETs above 800°F
"* A sustained Loss of ALL Feedwater has occurred THEN Control Room Staff implement SDS02, Section 1 -
" Powering 2CV-4740-2 from Vital Bus 2D27".
3.0 TO CLEAR ALARM 3.1 Raise bus 2D02 voltage above setpoint.
4.0 REFERENCES
4.1 E-2451-2A
PROCJWORK PLAN NO.
PROCEDUREIWORK PLAN TITLE:
PAGE:
3 of 58 2203.012G ANNUNCIATOR 2K07 CORRECTIVE ACTION CHANGE:
023-01-0
PROCJWORK PLAN NO.
PROCEDURE/WORK PLAN TITLE:
PAGE:
48 of 58 2203.012G ANNUNCIATOR 2K07 CORRECTIVE ACTION CHANGE:
023-01-0 ANNUNCIATOR 2K07 D-8 CET TEMP HI NOTE This alarm set at 700°F with Original Steam Generators (OSGs) installed.
1.0 CAUSES 1.1 CET temperature greater than variable alarm setpoint (2TI-4793).
2.0 ACTION REQUIRED 2.1 Verify temperature being controlled within desired band.
2.2 Use SPDS CET Display to verify temperature.
2.3 IF ALL of the following conditions exist:
"* Original Steam Generators (OSGs) installed
"* At least 5 available CETs above 800*F
"* A sustained Loss of ALL Feedwater has occurred THEN perform the following 2.3.1 Open ECCS Vent Valves
"* 2CV-4698-1
"* 2CV-4740-2 2.3.2 Declare Alert based on EAL 9.2 using 1903.011M, Alert Emergency Direction and Control Checklist - Shift Superintendent.
2.3.3 GO TO 2202.009, Functional Recovery 2.4 IF due to SDC failure, THEN GO TO Loss of Shutdown Cooling (2203.029).
2.5 Adjust variable alarm setpoints as necessary.
3.0 TO CLEAR ALARM 3.1 Lower CET temperature below variable alarm setpoint (2TI-4793).
4.0 REFERENCES
4.1 E-2455-4
SAMG DEVELOPED SAMG DEVELOPED STRATEGY TITLE:
PAGE:
1 of 3 STRATEGY SAMG DEVELOPED STRATEGY 02 SDS-02 EMERGENCY POWER FOR UNIT 2 ECCS VENT VALVES TABLE OF CONTENTS SECTION
- 1.
Powering 2CV-4740-2 from Vital Bus 2D27
- 2.
Powering 2CV-4698-1 from Vital Bus 2D26 Reference ER002624N201 PAGE 2
3
SAMG DEVELOPED SAMG DEVELOPED STRATEGY TITLE:
PAGE:
2 of 3 STRATEGY SAMG DEVELOPED STRATEGY 02 SDS-02 EMERGENCY POWER FOR UNIT 2 ECCS VENT VALVES SECTION 1 Powering 2CV-4740-2 from Vital Bus 2D27 Page 1 of 1 NOTES Operator actions should NOT be delayed for Health Physics, Security, or any other concerns.
Elevators should NOT be used when performing this procedure.
Prompt completion of these actions overrides all other procedures, technical specifications, or verbal directions other than those from Operations Management.
e Communications to DXO should use radio or telephone (extension 6091 for Corridor 340 and 6093 for 2B53 Room).
1.0 Entry 0 Performance of this attachment is directed by TSC or Control Room 2.0 ACTIONS 2.1 Open Valve 2CV-4698-1 (ECCS Vent Valve) from Control Room.
2.2 Open Breaker 2D02-21 (2D26 MCC Supply).
2.3 Retrieve DC Bus connection cable from cabinet/job box outsid 2.3 e 2B53 Room and proceed to 2B53 Room (Door 257).
Open Breaker 2D27-A2 (Upstream Feeder Breaker to 2CV-4698-1).
CAUTION Breaker 2D26-A2 (Upstream Feeder Breaker to 2CV-4740-2)
MUST be opened to prevent energizing the entire 2D26 Bus.
2.4 2.5 2.6 2.7 2.8 2.9 Open Breaker 2D26-A2.
Open raceway between rows 1 and 2 of the following MCCs:
- MCC cabinet 2D26
- MCC cabinet 2D27.
Connect DC Bus connection cable to plugs in each raceway.
Close Breaker 2D27-A2.
Inform Control Room power restored to 2CV-4740-2.
Open valve 2CV-4740-2 from Control Room.
SECTION 2 Powering 2CV-4698-1 from Vital Bus 2D26 Page 1 of 1 1.0 Entry
- Performance of this attachment is directed by TSC or Control Room 2.0 ACTIONS 2.1 Open Valve 2CV-4740-2 (ECCS Vent Valve) from Control Room.
2.2 Open Breaker 2D01-21 (2D27 MCC Supply) 2.3 Retrieve DC Bus connection cable from cabinet/job box outside 2B53 Room and proceed to 2B53 Room (Door 257).
Open Breaker 2D26-A2 (Upstream Feeder Breaker to 2CV-4740-2).
CAUTION Breaker 2D27-A2 (Upstream Feeder Breaker to 2CV-4698-1)
MUST be opened to prevent energizing the entire 2D27 Bus.
Open Breaker 2D27-A2.
Open raceway between rows 1 and 2 of the following MCCs:
eMCC cabinet 2D26 eMCC cabinet 2D27.
Connect DC Bus connection cable to plugs in each raceway.
Close Breaker 2D26-A2.
Inform Control Room power restored to 2CV-4740-2.
Open valve 2CV-4698-1 from Control Room.
NOTES Operator actions should NOT be delayed for Health Physics, Security, or any other concerns.
Elevators should NOT be used when performing this procedure.
Prompt completion of these actions overrides all other procedures, technical specifications, or verbal directions other than those from Operations Management.
Communications to DXO should use radio or telephone (extension 6091 for Corridor 340 and 6093 for 2B53 Room).
2.3 2.4 2.5 2.6 2.7 2.8 2.9
Emergency DC Crossconnect Watch Study Guide In the event of a loss of a total loss of feedwater, it may become necessary to depressurize the RCS to initiate feed and bleed cooling. Additionally, if high pressure safety injection and low pressure safety injection are unavailable in conjunction with a total loss of feedwater, it is critical that the RCS be depressurized to avoid the potential of steam generator tube failure due to the severe accident conditions.
The ECCS vent valves can be used to depressurize the RCS. These valves relieve steam from the pressurizer to the quench tank. The ECCS vent path has two DC powered valves in series, so they may be operated with a complete loss of AC power. The ECCS vent valves are powered from opposite 125 volt vital DC power. A problem exists, looking at single failure criteria, if one train of DC power is lost.
A contingency action has been developed to deal with the loss of one train of vital 125 volt DC. Pigtails with female connectors will be connected to the 2D26 and 2D27 buses and hung in the raceway next to the affected valves. Outside the 2B-53 room will be a locked JOBOX with a procedure and a 30' connecting wire with male connectors on each end.
When a loss of a DC bus occurs, the annunciator corrective action procedure will direct the control room to dispatch the Emergency DC Crossconnect Watch to the access to 2B-53 room to obtain instructions sheet and then to STANDBY in the ESF Switchgear corridor (corridor 340) for further instruction. When the control room gives the order, the Crossconnect Watch will verify he is using the correct section of the procedure and proceed to completion.
To accomplish this task the procedure guides the control room operator to open the ECCS vent valve on the still energized bus prior to electrically isolating the pigtails. The Crossconnect Watch will then open the DC bus supply breaker to the deenergized MCC as directed by the control room operator (2D26 or 2D27) and proceed to the 2B53 room.. The Crossconnect Watch will then open the upstream feeder breakers to both ECCS vent valves. The Crossconnect Watch will then connect the extension cable. Once the cable connectors are locked in place, the feeder breaker to the ECCS vent valve on the energized bus is closed sending DC power to the opposite train vent valve. The second ECCS vent valve is then opened from the control room commencing depressurization of the RCS.
THE OPERATOR MUST REMAIN ON STATION AND IN CONSTANT COMMUNICATION WITH THE CONTROL ROOM.
The evolution is expected to take less than 15 minutes (and has been time-validated at less than 10 minutes), but the need for proper self-checking can not be ignored. This evolution is considered vital for plant operation. DO NOT STOP for anyone (including HP and security) unless the operator's life or health is at immediate risk.
Since the response needs to be timely, the Emergency DC Crossconnect Watch shall carry a radio, flashlight, and set of spare AO keys with them at all times. The AO keys will be tracked using the key log in the shifly's office. Proper turnover needs to include the updating of the key log. The qual card for this watch will be given to RO's, NLO's, and trainees. It is the shift manager's responsibility to ensure that he has a qualified person available each shift. The person manning the Emergency DC Crossconnect Watch (DXO) is entered on the Shift Turnover Checklist.
Attached are sections of resources that may be helpful.
Name SSN Emergency DC Crossconnect Watch Objective: The objective of the Unit 2 Emergency DC Crossconnect Watch qualification card is to ensure that operators possess the knowledge and skills necessary to independently perform the assigned duty in a safe and efficient manner.
1.0
References:
1.1 STM 2-3, Reactor Coolant System 1.2 STM 2-32-5, 125 Vdc Electrical Distribution System 1.3 COPD001, Self-Verification/Additional Verification 1.4 COPD-15, Communication Standards 1.5 SDS-02, SAMG Developed Strategy 02 2.0 Knowledge Requirements:
2.1 Discuss the function and importance of ECCS vent valves during Severe Accident Mitigation.
2.2 Discuss the type of valve ECCS vents are and where their controls are located.
2.3 Discuss the affect of a loss of 2D01 or 2D02 on the ECCS vent valves.
2.4 Discuss the duties and responsibilities of the Emergency DC Crossconnect Watch.
2.4.1 What actions are required 2.4.2 Use of self-verification 2.4.3 Operation of a DC breaker 2.4.4 Operation of a molded case breaker 2.4.5 Response time required 2.4.6 Expectation to remain on station 2.5 Equipment required for watchstanding.
2.6 Purpose and use of key log.
2.7 Proper communication and radio use.
2.8 Turnover of watchstanding duties.
OPS Supervisor 3.0 Performance Tasks:
3.1 Crossconnect 2D26 and 2D27 to power 2CV-4740-2 from 2D27 (SDS-02, Section 1)
T
/
E
/
OPS Supervisor OPS Supervisor 3.2 Crossconnect 2D26 and 2D27 to power 2CV-4698-1 from 2D26 (SDS-02, Section 2)
T
/
E
/
OPS Supervisor OPS Supervisor 4.0 Final Certification:
Shift Superintendent
6.7 Auxiliary Operator 6.7.1 The Auxiliary Operator reports to the CRS of their respective Unit and is responsible for all operational activities executed outside the Control Room associated with secondary auxiliary components and systems.
6.7.2 Specific responsibilities and authorities assigned to the Auxiliary Operator are the same as those stated in Section 6.6.2 and 6.6.3 for the Waste Control Operator.
CAUTION Dedicated Cross-tie Operator (DXO) is a Unit 2 specific watchstation and SHA.LL bemanned when Unit 2 Original Steam Generators (OSGs) are installed.
6.8 Dedicated Cross-tie Operator (DXO) 6.8.1 The Dedicated Cross-tie Operator (when manned) reports to the CRS of Unit 2 and is responsible for implementation of Severe Accident Management Guideline (SAMG)
Developed Strategy 02 (SDS02),
"EMERGENCY POWER FOR UNIT 2 ECCS VENT VALVES".
6.8.2 Specific responsibilities and authority assigned to the Dedicated Cross-tie Operator include the following:
"* Maintain manned status when Original Steam Generators (OSGs) are installed on Unit 2.
Maintain response capability with appropriate equipment Radio Flashlight Key to Door 257 (Room 2091 AKA 2B53 Room)
Implement SDS02 when directed by the CRS or the Technical Support Center (TSC).
A copy of SDS02 is housed with the DC Bus connection cable at cabinet/job box outside Door 257.
6.9 Shift Engineer (SE)/Shift Technical Advisor (STA) 6.9.1 The SE/STA is responsible to be within operable communication range and available to the Control Room within ten minutes of call by the Control Room personnel.
(3.3.13}
6.9.2 The SE/STA is responsible to maintain respirator qualifications, and if corrective eyewear is normally needed, maintain appropriate SCBA eyewear (spectacles or contact lenses) readily available.
PAGE 6 OF 42 SHIFT TURNOVER CHECKLIST MODES 1 -
4 PAGE 1 OF 12 INSTRUCTIONS:
1.0 Circle YES, NO or N/A for each item in any desired order.
2.0 N/A items not applicable due to mode or being aligned to other train.
3.0 If NO is circled, then explain in the Remarks section.
4.0 If NO is circled on a Tech Spec (TS) required component, then refer to associated Tech Spec Action Statement and notify opposite unit, as applicable.
Mode:
Date:
Time:
A.
SDBCS ALIGNMENT (2C02)
- 1.
2CV-1002 (A S/G Upstream ADV Isol) closed YES NO
- 2.
2CV-1052 (B S/G Upstream ADV Isol) closed YES NO
- 3.
2CV-1001 (Upstream ADV) closed, HIC in Manual, permissive in Off YES NO
- 4.
2CV-1051 (Upstream ADV) closed, HIC in Manual, permissive in Off YES NO
- 5.
2CV-0301 (DDV) closed, HIC in Auto and permissive HS in Auto YES NO
- 6.
2CV-0305 (DDV) closed, HIC in Auto and permissive HS in Auto YES NO
- 7.
2CV-0302 (Bypass Vlv) closed, HIC in Auto, permissive HS in Auto YES NO
- 8.
2CV-0303 (Bypass Vlv) closed, HIC in Auto, permissive HS in Auto YES NO
- 9.
2CV-0306 (Bypass Vlv) closed, HIC in Auto, permissive HS in Auto YES NO B.
SHUTDOWN COOLING (2C04)
Two independent ECCS subsytems required operable in Mode 1, 2 & 3 with PZR pressure Ž1700 psia.
(TS 3.5.2)
- 1.
2CV-5091 (LPSI Disch Header) open.
YES NO N/A
- 2.
2HS-5091 in ESF with the key removed.
YES NO N/A
- 3.
2FIC-5091 (LPSI Disch Hdr Flow) in Auto & set at -2500 gpm.
YES NO N/A
- 4.
IF 2TI-4793 NOT in use for SDC, YES NO N/A THEN 2TI-4793 energized AND CET alarms set at 700'F form title:
form no.
change no..
SHIFT TURNOVER CHECKLIST MODES 1 -
4 1015.016 B
021-02-0
PAGE 17 OF 42 SHIFT TURNOVER CHECKLIST MODES 1 -
4 PAGE 12 OF 12 W.
- 1.
IF a MSIS actuation channel becomes inoperable in 2C39 or 2C40, THEN restore the actuation channel within one hour or be in Hot Standby within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
- 2.
IF a component required.for MFW isolation becomes inoperable (i.e.,
a Condensate,
THEN restore the component within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or place it in its MSIS actuated state.
Otherwise be in Hot Standby in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
COMMENTS:
If position manned, then list on shift personnel:
S/S CRSA CBOR WCO EOP CRS TRO CBOT AO SE DXO*
- IF Original Steam Generators (OSGs) installed, THEN Dedicated Cross-tie Operator (DXO) manned.
PERFORMED BY:
REVIEWED BY:
form title:
form no.
change no..
SHIFT TURNOVER CHECKLIST MODES 1 -
4 1015.016 B
021-02-0
CONTINGENCY ACTIONS 019. IF EITHER of the following conditions exist:
A. EITHER SG with level less than 70 inches.
B. RCS TC rising in an uncontrolled manner.
THEN establish Heat Removal via Once Through Cooling as follows:
A. Close MSIVs from Control Room.
B. Manually actuate SIAS and CCAS.
C. Verify ALL HPSI Cold Leg Injection MOVs open.
D. Verify ALL available Charging pumps running.
E. Check 4160v Vital buses 2A3 and 2A4 energized from offsite power.
(Step 19 continued on next page)
E. Perform the following:
- 1) IF EITHER 4160v Vital bus energized from offsite power, THEN perform the following:
a) Commence aligning third HPSI pump to associated bus.
b) WHEN third HPSI pump alignment complete, THEN verify third HPSI pump running.
- 2) IF ANY 4160v Vital bus energized from DG, THEN perform the following:
a) Verify ONE HPSI pump running on train supplied by DG.
b) GO TO Step 19.G.
PROC NO TITLE REV DATE PAGE 2202.006 LOSS OF FEEDWATER 004-02-0 6/13/00 116 of 33 INSTRUCTIONS
CONTINGENCY ACTIONS
- 19. (continued)
F. Verify three HPSI pumps running.
- G. Verify at least ONE HPSI pump running.
H. Open ECCS PZR Vent valve (2CV-4698-1).
I. Open LTOP/ECCS Relief Isolation valve (2CV-4740-2).
J. Maintain BOTH SG pressures 950-1050 psia using upstream ADVs or upstream ADV isolation MOVs.
K. GO TO 2202.009, Functional Recovery.
"* MFW
"* Condensate
"*21. Maintain SG pressure less than 1050 psia:
A. Control SG pressure using SDBCS Bypass valves or ADVs.
B. Check at least ONE Condensate pump running.
(Step 21 continued on next page)
PROC NO TITLE 2202.006 LOSS OF FEEDWATER
- G. IF NO HPSI pumps running, THEN perform the following:
- 1) Verify MSIVs closed
- 2)
GO TO step 19.J.
H. Open LTOP Relief Isolation valve (2CV-4741 -1 ).
I. Perform the following:
- 1) Open LTOP Relief Isolation valve (2CV-4731-2).
- 2) Open LTOP Relief Isolation valve (2CV-4730-1).
- 20. IF FW flow NOT restored, THEN RETURN TO Step 11.
B. Start ONE Condensate pump using 2106.016, Condensate and Feedwater Operations.
REV DATE PAGE 004-02-0 6/13/00 17 of 33 r
INSTRUCTIONS
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