RS-08-054, Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, Reactor Protection System (RPS) Instrumentation, Scram Discharge Volume Level Instrumentation Surveillance Requirements
| ML081060254 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 04/10/2008 |
| From: | Benyak D AmerGen Energy Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RS-08-054 | |
| Download: ML081060254 (77) | |
Text
AmerGen Energy Company, LLC www.exeloncorp.com 4300 Winfield Road Warrenville, (L 60555 RS-08-054 10 CFR 50.90 April 10, 2008 U. S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington, DC 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461 Subject :
Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS)
Instrumentation," Scram Discharge Volume Level Instrumentation Surveillance Requirements An Exelon Company
References:
1. Letter from Mr. Thomas S. O'Neill (AmerGen Energy Company, LLC) to U. S. NRC, "Request for Amendment to Technical Specification 3.3.1.1, 'Reactor Protection System (RPS) Instrumentation,' Scram Discharge Volume Level Instrumentation Surveillance Requirements,"
dated January 26, 2007
- 2.
Letter from Mr. Darin M. Benyak (AmerGen Energy Company, LLC) to U. S. NRC, "Supplement to Request for Amendment to Technical Specification 3.3.1.1, 'Reactor Protection System (RPS)
Instrumentation,' Scram Discharge Volume Level Instrumentation Surveillance Requirements," dated June 6, 2007
- 3.
Letter from U. S. NRC to Mr. Christopher M. Crane (AmerGen Energy Company, LLC), "Clinton Power Station, Unit No. 1 - Request for Additional Information Related to Reactor Protection System Instrumentation Scram Discharge Volume Level Instrumentation Scram Discharge Volume Level Instrumentation Surveillance Requirements for the Clinton Power Station, Unit No. 1 (TAC No.
MD4111)," dated August 9, 2007
- 4.
Letter from Mr. Darin M. Benyak (AmerGen Energy Company, LLC) to U. S. NRC, "Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, 'Reactor Protection System (RPS) Instrumentation,' Scram Discharge Volume Level Instrumentation Surveillance Requirements," dated October 11, 2007
April 10, 2008 U. S. Nuclear Regulatory Commission Page 2
- 5.
Letter from U. S. NRC to Mr. Charles G. Pardee (AmerGen Energy Company, LLC), "Clinton Power Station, Unit No. 1 - Request for Additional Information Related to License Amendment Request to Revise Technical Specification 3.3.1.1, 'Reactor Protection System (RPS) Instrumentation,' Scram Discharge Volume Level Instrumentation Surveillance Requirements (TAC No. MD4111),"
dated March 11, 2008 In Reference 1, AmerGen Energy Company, LLC (AmerGen) requested an amendment to the facility operating license for Clinton Power Station (CPS), Unit 1. The proposed change is requested to revise the surveillance frequency for the scram discharge volume (SDV) level float switch functional test from every 92 days to every 24 months.
Reference 2 provided additional information requested by the NRC to support their review of Reference 1. In Reference 3, the NRC requested that AmerGen provide additional information in support of their review of Reference 1. The requested information was provided in Reference 4.
On January 24 and March 4, 2008, representatives of AmerGen and the NRC participated in conference calls to discuss the proposed license amendment provided in Reference 1. In Reference 5, the NRC indicated that, to complete its review of the proposed license amendment request, additional information is required. This letter provides the requested additional information.
AmerGen has reviewed the information supporting a finding of no significant hazards consideration that was previously provided to the NRC in Reference 1. The additional information provided in this submittal does not affect the bases for concluding that the proposed license amendment does not involve a significant hazards consideration. No new regulatory commitments are established by this submittal.
If you have any questions concerning this letter, please contact Mr. Timothy A. Byam at (630) 657-2804.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 10`" day of April 2008.
Respectfully, Darin M. Benyak Director - Licensing and Regulatory Affairs AmerGen Energy Company, LLC
April 10, 2008 U. S. Nuclear Regulatory Commission Page 3 Attachments:
1. Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements
- 2.
Magnetrol Float Switch Diagram
- 3. CPS Procedure No. 9431.22, "SDV High Water Level Float Switch C11-N013A (13, C, D) Channel Calibration," Revision 37
- 4. CPS Procedure No. 9531.22, "SDV High Water Level Float Switch C11-N013A (B, C, D) Channel Functional," Revision 38
- 5.
Exelon Procedure ER-AA-520, "Instrument Performance Trending," Revision 3
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements The NRC reviewer provided the following request for additional information. The AmerGen Energy Company, LLC (AmerGen) response is provided for each request.
In reviewing the January 26, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070330254), AmerGen Energy Company, LLC submittal regarding an amendment to Appendix A, Technical Specifications for Clinton Power Station, Unit No. 1, the NRC staff has identified issues which will require resolution. Specifically, the submittal requests changes which will revise surveillance requirements (SR) 3.3.1.1.9 for the scram discharge volume level float switch from every 92 days to every 24 months. Hence, additional information is required for the staff to complete its review.
In section 4.1, Attachment 1, of the "RS-07-014, Request for Amendment to Technical Specification 3.3.1.1, Reactor Protection System (RPS) Instrumentation [[Topic" contains a listed "[" character as part of the property label and has therefore been classified as invalid. Level Instrumentation Surveillance Requirements|letter dated January 26, 2007]], it is stated, "These surveillances have routinely shown that the as-found condition of the instruments has not required readjustment. Surveillance test results from the past 12 quarters have been reviewed and it was determined that the as-found condition of the four float switches have been found to be within the acceptance criteria specified in the surveillance test procedures. In addition, the float switches are mechanical devices that are not subject to instrument setpoint drift and furthermore have not been subjected to failures requiring mechanical adjustment during this period. "
The NRC staff needs following clarifications/information :
A. 12 quarters (48 months) is not adequate to justify extension of functional tests from quarterly to 24 months - please provide sufficient performance data to ensure 95%
confidence level.
Response :
In the original license amendment request (Reference 1), AmerGen stated that surveillance test results from the previous 12 quarters had been reviewed and it was determined that the as-found condition of the four float switches had been found to be within the acceptance criteria specified in the surveillance test procedures. Additional discussion of the historical performance of these switches was provided in a supplemental letter to the NRC (Reference 2). These surveillances have routinely shown that the as-found condition of the instruments has not required readjustment.
The quarterly channel functional test (i.e., CPS Procedure No. 9531.22, "SDV High Water Level Float Switch C11-N013A (B, C, D) Channel Functional,") does not make any changes in the adjustment of the float switch.
If the quarterly functional test were to fail its acceptance criteria, CPS procedure 9431.22, "SDV High Water Level Float Switch C11-N013A (13, C, D) Channel Calibration," would be performed. Our review of past channel calibrations shows that the float switches are routinely found within the one-half inch As-Left Tolerance band and do not require adjustment. Performance of the channel calibration has never identified the failure of a Scram Discharge Volume (SDV) water level float switch to meet the Technical Specification (TS) acceptance criteria for Allowable Value (AV). The results of the calibration surveillances since 1990 are provided in the following tables.
Page 1 of 7
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements Table 1 Calibration Data for 1 C11-N013A Table 2 Calibration Data for 1C11-N013B Calibration Date Calibration Procedure Instrument EPN As Found (inches)
As Left (inches)
Calibration Interval (days) 6/13/1990 9431.22 1 C11 NO13B 48.375 48.375 N/A 11/22/1991 9431.22 1 C11 NO13B 48.375 48.375 527 5/12/1993 9431.22 1 C11 NO13B 48.25 48.25 537 11/9/1994 9431.22 1 C11 NO13B 48 48 546 5/16/1996 9431.22 1 C11 NO13B 48.25 48.25 554 12/2/1997 9431.22 1 C11 NO13B 48 48 565 6/10/1999 9431.22 1 C11 NO13B 48.125 48.125 555 12/14/2000 9431.22 1 C11 NO13B 48.125 48.125 553 5/23/2002 9431.22 1 C11 NO13B 48.0625 48.0625 525 11/14/2003 9431.22 1 C11 N013B 47.875 47.875 540 5/11/2005 9431.22 1 C11 NO13B 47.75 47.75 544 9/18/2007
(
9431.22 1
C11 N013B 48 48 860 Calibration Date Calibration Procedure Instrument EPN As Found (inches)
As Left (inches)
Calibration Interval da s 6/13/1990 9431.22 1 C11 NO13A 48.5 48.5 N/A 11/14/1991 9431.22 1 C11 NO13A 48.25 48.25 519 5/12/1993 9431.22 1 C11 NO13A 48.375 48.375 545 11/9/1994 9431.22 lCllNO13A 48.125 48.125 546 6/12/1996 9431.22 1 C 11 NO13A 48.25 48.25 581 8/2/1997 9431.22 1 C11 NO13A 48.25 48.25 416 12/1/1997 9431.22 1 C11 NO13A 48.25 48.25 121 6/10/1999 9431.22 1 C11 NO13A 48.375 48.375 556 12/14/2000 9431.22 1 C11 NO13A 48.375 48.375 553 5/21/2002 9431.22 1 C 11 NO13A 48.1875 48.1875 523 11/14/2003 9431.22 lCllNO13A 48.25 48.25 542 5/12/2005 9431.22 1 C11 NO13A 48.25 48.25 545 9/18/2007 9431.22 1 C11 NO13A 48.25 48.25 859
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements Table 3 Calibration Data for 1C11-NO13C Table 4 Calibration Data for 1C11-N013D The difference between the As-Found and the As-Left values did not exceed the one-half inch tolerance. The necessary adjustment during both these surveillances was significantly less than the more than 12 inch difference between the Actual Trip Setpoint (ATSP) and the TS AV. The values of the ATSP and AV are provided in the response to request D below.
Page 3 of 7 Calibration Date Calibration Procedure Instrument EPN As Found (inches)
As Left (inches)
Calibration Interval (days) 6/18/1990 9431.22 1 C11 NO13D 48.675 48.675 N/A 11/26/1991 9431.22 1 C11 NO13D 48.75 48.75 526 5/28/1993 9431.22 1 C11 NO13D 48.75 48.75 549 11/21/1994 9431.22 lCllNO13D 48.675 48.675 542 5/21/1996 9431.22 1 C 11 NO13 D 48.5 48.6 +
547 12/3/1997 9431.22 1 C11 NO13D 48.75 48.75 561 6/10/1999 9431.22 1 C11 NO13D 48.5625 48.5625 554 12/15/2000 9431.22 1 C11 N013D 49.1875 48.6875 +
554 5/20/2002 9431.22 1 C11 NO13D 48.375 48.375 521 11/121/2003 9431.22 1 C11 NO13D 48.625 48.625 541 5/11/2005 9431.22 1 C11 NO13D 48.75 48.75 546 9/18/2007 9431.22 1 C11 NO13D 48.375 48.375 860 Calibration Date Calibration Procedure Instrument EPN As Found (inches)
As Left (inches)
Calibration Interval (days) 6/18/1990 9431.22 1 C11 NO13C 48.125 48.125 N/A 11/25/1991 9431.22 1 C11 NO13C 48.375 48.375 525 5/28/1993 9431.22 1 C11 NO13C 48.375 48.375 550 11/21/1994 9431.22 1 C 11 NO13C 48 48 542 5/20/1996 9431.22 1 C11 NO13C 48.25 48.25 546 12/3/1997 9431.22 1 C11 NO13C 47.875 47.875 562 12/9/1998 9431.22 1 C11 NO13C 48.25 48.25 371 6/10/1999 9431.22 1 C11 NO13C 47.9375 47.9375 183 12/14/2000 9431.22 1 C11 NO13C 48 48 553 5/22/2002 9431.22 1 C 11 NO13C 48 48 524 11/13/2003 9431.22 1 C11 NO13C 48 48 540 5/11/2005 9431.22 1 C11 NO13C 48.125 48.125 545 9/18/2007 9431.22 1 C11 NO13C 48 48 860
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements In summary, the review of functional test results from the previous 12 quarters indicated that the as-found condition of the four float switches have been found to be within the acceptance criteria specified in the surveillance test procedure (i.e., CPS No. 9531.22).
As noted above, a review of the calibration test results, since 1990, for these switches also indicates that the As-Found and As-Left setpoints have been within the required one-half inch tolerance. Based on the evaluation of 46 calibrations, it can be demonstrated that this is sufficient data to support a 95% confidence level. The review of the associated maintenance history also indicated that there has been no maintenance performed on these switches that would invalidate these conclusions.
Reference 2 provided an evaluation of the proposed change against the guidance in Generic Letter 91-04, "Changes in Technical Specification Surveillance Intervals to Accommodate a 24-Month Fuel Cycle," and concluded that the effect on plant safety is small, that the change does not invalidate any assumption in the plant licensing basis, and that the impact, if any, on system availability is minimal from the proposed change to a 24-month testing frequency.
- 8. The float switches are subjected to calibration test SR 3.3.1.1.13 - how has it been concluded that the switches are not subject to instrument drift?
Response
The float switch is a mechanical device (see Attachment 2 for a diagram of the switch mechanism). Its construction is primarily metal. The environmental effects on the device from normal temperature, humidity and radiation are insignificant in comparison to the required As-Left Tolerance (ALT) band of 1/2". The effects of wear on moving parts is a long term process and is able to be adjusted out or discovered and replaced during the 24-month interval calibration and the 24-month preventive maintenance inspection of the switch mechanism. These devices have proven to be reliable over time.
As stated in Reference 2, the reliability of the affected float switches is monitored under the CPS Maintenance Rule program. If the pre-established reliability performance criterion is exceeded for the SDV float switches, consideration must be given to 10 CFR 50.65, "Requirements for monitoring the effectiveness of maintenance at nuclear power plants," paragraph (a)(1) actions, including increased management attention and goal setting in order to restore their performance (i.e., reliability) to an acceptable level. The performance criteria are risk based and, therefore, are a means to manage the overall risk profile of the plant. An accumulation of large core damage probabilities over time is precluded by the performance criteria.
As described above, monitoring and periodically evaluating the actual SDV water level float switch reliability will assess the effect of the proposed extension of the surveillance test interval on plant performance in relationship to the Maintenance Rule goals. To ensure the proposed change does not degrade operational safety over time, the Maintenance Rule program will identify and correct adverse trends.
If AmerGen concludes that the performance or condition of the float switches affected by the Page 4 of 7
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements proposed change does not meet established performance criteria, appropriate corrective action will be taken, in accordance with the Maintenance Rule.
C. What is the make and the model number of the float switches and what is the industry experience with these switches? Does Title 10 of the Code of Federal Regulations (10 CFR) Part 21, "Reporting of Defects and Noncompliance" apply?
Response
The SDV switches are Magnetrol model C-751 float switches (see Attachment 2 for a diagram of the float switch). The subject float switches are part of the Reactor Protection System (RPS) and subject to the requirements of 10 CFR 21. Based on a review of industry operating experience data, there have been no Part 21 notifications identified for this model switch. There is, however, experience with switch failures due to pivot point contamination or wear. Due to operating experience, several years ago, CPS created a preventive maintenance task that inspects the switch mechanisms of these float switches every 24 months for defects. Switches are inspected for excessive wear on the actuating lever or misalignment of the adjustment screw at the point of contact between the screw and lever. CPS has not directly experienced any problems with these switches.
D. What are the nominal trip setpoints, acceptable as-left and as-found trip setpoints for float switches?
Response
The calculated setpoint is the Nominal Trip Setpoint (NTSP). The ATSP, or the procedural setpoint, in this case is more conservative. Both are provided along with the as-found and as-left tolerances in the table below.
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS)
Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements
- (
) =Equivalent converted value not actually in document Table 5 SDV Float Switch Setpoints EIN 1C11-N013A*
Document basis AV TS 62-3/8" 763' 3-1/4" 62-3/8" 763'3-1/4" 61-5/16" 763' 1-11/16" 61-5/16" 763' 1-11/16"TS Calculated from Datum /
Table 3.3.1.1-1 Item 8b NTSP Calculation 60-3/8" 763'1-1/4" 60-3/8" 763'1-1/4" (59-5/16")762'11-11/16"(59-41/64") 763'0-1/64" Cl-CPS-0148,149,150,151 ATSP Procedure 48-1/2" (762'1-3/8")l 48-1/4" (762'1-1/8") 48-3/8" 762' 0-3/4" 48-3/4" 762' 1-1/8" 9431.22 ALT Procedure +0" -1/2" N/A
+0" -1/2" N/A
+0" -1/2" N/A
+0" -1/2" N/A 9431.22 AFT Procedure +0" -1 /2" N/A
+0" -1/2" N/A
+0" -1/2" N/A
+0" -1/2" N/A 9431.22 Datum) 0" 758' 0-7/8" 07--7758'0-7/8" 0"
758' 0-3/8" 0"
758' 0-3/8" Cl-CPS-0148,149,150,151
ATTACHMENT 1 Additional Information Supporting the Request for Amendment to Technical Specification 3.3.1.1, "Reactor Protection System (RPS) Instrumentation" Scram Discharge Volume Level Instrumentation Surveillance Requirements In the Attachment to the "RS-07-086, Supplement to Request for Amendment to Technical Specification 3.3.1.1, Reactor Protection System (RPS) Instrumentation, [[Topic" contains a listed "[" character as part of the property label and has therefore been classified as invalid. Level Instrumentation Surveillance Requirements|letter dated June 6, 2007]] (ADAMS Accession No. ML071580953), the licensee quoted plant procedures 9431.22 and 9531.22. Do the plant procedures conform to clause B.4 of the NRC letter dated September 7, 2005 (ADAMS Accession No. ML052500004)?
Response
To support NRC review of the proposed LAR, AmerGen is providing copies of the CPS procedures 9431.22 and 9531.22 as well as Exelon procedure ER-AA-520, "Instrument Performance Trending." Procedure ER-AA-520 provides guidance on the actions to take when surveillance criteria are not met. This guidance includes use of the corrective action program to document out-of-tolerances and returning the setting to back within tolerance if found out during the surveillance. As such, these procedures do conform to the clause B.4 discussion with the exception that the TS Bases does not include the discussion.
References 1. Letter from Mr. Thomas S. O'Neill (AmerGen Energy Company, LLC) to U. S. NRC, "Request for Amendment to Technical Specification 3.3.1.1, 'Reactor Protection System (RPS) Instrumentation' Scram Discharge Volume Level Instrumentation Surveillance Requirements," dated January 26, 2007
- 2. Letter from Mr. Darin M. Benyak (AmerGen Energy Company, LLC) to U. S. NRC, "Supplement to Request for Amendment to Technical Specification 3.3.1.1, 'Reactor Protection System (RPS) Instrumentation,' Scram Discharge Volume Level Instrumentation Surveillance Requirements," dated June 6, 2007
ATTACHMENT 2 Magnetrol Float Switch Diagram
EXAMPLE :
DESCRIPTION DIAGRAM A B75-1 B20-AK OPERATING PRINCIPLE Basic Part No.
Magnetrol controls are identified by an alpha-numeric numbering system. The first three digits identify the basic model, the next four digits identify construction materials and tank connection. The final digits describe type of switch and switch enclosure.
i--
Basic Switch Series Switch Mechanism and Enclosure note Materials and Tank Connection Diagrams A and B illustrate the simple and foolproof Magnetrol operating principle. Switching action is obtained through the use of a magnetic attracting sleeve, actuated by a float, and a switching mechanism. These two basic component assemblies are separated by a non-magnetic, INSTRUCTION MANUAL AND PARTS LIST MODEL 730 AND 751 SEWS, LIQUID LEVEL CONTROL PIVOT TENSION SPRING MAGNET SWING IN POSITION FIG. 1 OPERATING CYCLE MAGNGTROL INTERNATIONAL, INCORPORATED BULLETIN : 46-620.1 EFFECTIVE : December 1981 SUPERSEDES: September 1979 DIAGRAM B v
pressure tight enclosing tube. A switch and magnet are assembled to a swinging arm which operates on precision stainless steel pivot sockets.
At "Normal Operating Level" of liquid in the chamber (diagram "A"), the float moves the magnetic attracting sleeve upward in the enclosing tube and into the field of the switch mechanism magnet. As a result, the magnet is drawn in tightly to the enclosing tube causing the switch to tilt, "making" or "breaking" an electrical circuit. As liquid level recedes, the float pulls the magnetic attracting sleeve down-ward until, at a predetermined "Low Level" (diagram "B"1, the switch magnet releases and is drawn outward away from the enclosing tube by a tension spring. This in turn tilts the switch in an opposite direction, thus reversing switch action.
When liquid level returns to normal, the float once again moves the magnetic attracting sleeve up the enclosing tube, causing the switch to assume its original position.
0 A third digit in the switch code identifies enclosure cov-er length and finish.
MODEL 751 SERIES REPLACEMENT PARTS SHEATHED TYPE ATTRACTION SLE5VE (Se& Note (D )
TYPICAL MODEL 751 SERIES LEVEL CONTROL FIG. 5
NOTE :
MODEL, 751 SERIES REPLACEMENT PARTS -continued Sleeve kit part numbers denoted "SST" include sheathed type attraction sleeves used on models specified for corrosive service. Standard kit part numbers denoted "Std." include attraction sleeves of type 400 series stainless steel.
Chamber assemblies are available as complete sensing units only with all parts listed under items 4 through 10 assembled. See important order note following.
Consult factory for all other switch series.
IMPORTANT :
IMPORTANT : Many model 751 controls are specially tailored to meet specific customer specifications and therefore may contain special parts. When always give Serial Number of control.
When ordering, please specify :
A. Model and Serial Number of control.
B. Name and/or Number of replacement assembly.
- ordering, I
STANDARD REPLACEMENT ASSEMBLY KITS T
DESCRIPTION SWITCH (D 751 MODEL PREFIX E
M REF.
SERIES B,C,E,G,H,J,K B,C & D L M,&N 1
HOUSING COVER See bulletin 42680 for switch housing replacement Housing All assemblies. On units with pneumatic switching, Kits consult bulletin on mechanism furnished for special 2
HOUSING BASE housing base assemblies (listed on Page 2).
3 SWITCH MECHANISM See bulletin on switch mechanism furnished (listed on Page 2).
4 JAM NUTS A,B,C,D,E 89-3409-001 89-3409-002 (Std.)
(Std.)
5 GUIDE WASHER(S)
Sleeve J
89-3410-001 89-3410-002 Kits (SST)
(SST) 0 89-3409-002 (Std.)
89-3409-004 (Std.)
6 ATTRACTION SLEEVE K
89-3410-003 (SST) 89-3410-004 (SST) 89-3409-005 (Std.)
89-3409-006 (Std.)
7 STOP TUBE (If Used)
G,H,I 89-3410-005 (SST) 89-3410-006 (SST)
A,B,C,D,E 89-5933-005 89-5933-006 8
ENCLOSING TUBE J
89-5933-002 89-5933-003 E-Tube Kits K
9 E-TUBE GASKET 89-5933-005 89-5933-006 G,H,I Gasket 9
E-TUBE GASKET Kit All 89-3612-001 Sensing 10 CHAMBER ASSEMBLY Unit All O
ATTACHMENT 3 CPS Procedure No. 9431.22, "SDV High Water Level Float Switch C11-N013A (B, C, D) Channel Calibration" Revision 37
O 0
O 0
CPS 9431.22 SDV HIGH WATER LEVEL FLOAT SWITCH C11-N013A(B,C,D) CHANNEL CALIBRATION SCOPE OF REVISION :
Revised Section 8.4 system restoration to be consistent with channel functional steps to drain float switches and test rig turbine.
E Levell-CONTlNUOOSOSE ORIGINATOR : Stan Bielling CLASS CODE : SNND SQR : Michael Duffey APPROVAL DATE : Sept. 25, 2007 CURRENT CHANGES TO GENERAL REVISION Change #
Date List of Affected Pages
1.0 Purpose 2.0 Discussion/Definitions 3.0 Responsibility 4.0 Precautions 5.0 Prerequisites 6.0 Limitations TABLE OF CONTENTS 7.0 Materials and/or Test Equipment 8.0 Procedure 8.1 Functional Test and Loop Calibration 8.2 Float Switch Adjustment 8.3 Post Adjustment Loop Calibration 8.4 System Restoration 9.0 Acceptance Criteria 10.0 Final Conditions 11.0 References 12.0 Appendices 13.0 Documents CPS 9431.22
2.1.2 PURPOSE CPS 9431.22 To provide instructions for performance of a Channel Calibration of Scram Discharge Volume High Water Level Float Switch Channel Cll-N013A(B,C,D) 1.2 Performance of this procedure satisfies requirements as specified :
2.
3.
Channel Functional Test (Fully)
CPS ITS SR 3.3.1.1.9 T8.b.
Channel Calibration (Fully)
" CPS ITS SR 3.3.1.1.13 T8.b.
Logic System Functional (Partially)
CPS ITS SR 3.3.1.1.15 T8.b.
2.0 DISCUSSION/DEFINITIONS 2.1 c 2.1.1 Discussion Frequency :
the following 1.
2.
Other Triggers - 92 day Channel Functional test as performed by CPS 9531.22, SDV HIGH WATER LEVEL FLOAT SWITCH Cll-N013A(B,C,D) CHANNEL FUNCTIONAL.
Normal Frequency - performed every 24 months.
Satisfactory completion of this procedure will satisfy requirements of CPS 9531.22.
2.1.3 This procedure includes steps necessary to perform channel calibration of this instrument channel up to point where this channel converges with other channels.
This channel provides signal for an automatic scram trip.
2.1.4 The components for the loops are as follows :
Rev.
37 Page 3 of 29 Channel Cll-N013A :
Float Switch Cll-NO13A CNT-237° Elev 762' Annunciator Window 2A 5004 (H13-P680-05A)
Computer Point C11NC033 Channel Cll-N013B :
Float Switch Cll-NO13B CNT-237° Elev 762' Annunciator Window 2A 5005 (H13-P680-6A)
Computer Point C11NC034
2.1.5 This procedure includes the sections necessary to perform the Functional Check, Calibration Check and Instrument Calibrations.
These sections may be performed as needed restore the channel to specifications or as specified by the initiating work document.
Sections not performed should be N/A'd.
2.1.6 The completed test package shall be routed and dispositioned in accordance with WC-AA-111, Predefine Process.
2.2 Definitions 3.0 RESPONSIBILITY 4.0 Datum - Top of weldment at scram discharge volume drain connection.
The Manager - Instrument Maintenance Department (IMD) shall be responsible for implementation and review of this procedure.
PRECAUTIONS 4.1 Improper implementation of this procedure could result in an unwanted scram.
Ensure the performance of this channel calibration does not satisfy any logic functions which would cause an unwanted response.
(Refer to step 5.5.)
4.2 The float switch being calibrated is contaminated and normally under pressure.
Appropriate precautions should be taken.
4.3 Ensure requirements of MA-AA-716-008, FOREIGN MATERIAL EXCLUSION PROGRAM, are met.
Rev.
37 Page 4 of 29 to 2.1.4 (cont'd)
CPS 9431.22 Channel Cll-N013C Float Switch Cll-NO13C CNT-122° Elev 762' Annunciator Window 2A 5005 (H13-P680-6A)
Computer Point C11NC035 Channel Cll-N013D :
Float Switch Cll-NO13D CNT-122° Elev 762' Annunciator Window 2A 5004 (H13-P680-05A)
Computer Point C11NC036
4.4 Tag out equipment, (if required), in accordance with OP-CL-109-101, Clearance and Tagging, prior to removal of level switch components in Section 8.2.
4.5 Coordinate breaks and turnover with Control Room Supervisor.
Operations should consider placing division under test in Sensor Bypass per CPS 3305.01 during breaks/turnover.
5.0 PREREQUISITES 5.1 Circle the channel number being tested below.
Cll-NO13 A
B C
D 5.2 Test equipment to be used for quantitative data shall have calibrations that are up to date.
5.3 Establish communications between the Main Control Room (MCR) and float switch Cll-N013A(B,C,D)
Suggested phone jacks are shown below :
0 SWITCH PHONE JACK Cll-NO13A H22-P022, 1F10 Cll-NO13B H22-P022, 1F10 Cll-NO13C H22-P010, 1G8 Cll-NO13D H22-P010, 1G8 CPS 9431.22 INITIAL 5.4 In conjunction with Shift management, review the following impact statements to determine required plant status to perform this test :
OPERABILITY IMPACTS CPS ITS LCO 3.3.1.1, Reactor Protection System (RPS) Instrumentation, Table 3.3.1.1-1, item ;
8.
Scram Discharge Volume Water Level - High b. Float Switch (Modes 1, 2, 5a )
(a)
With any control rod withdrawn from a core cell containing one or more fuel assemblies
5.4 (cont, d)
SYSTEMS AFFECTED :
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP [5004-2A]
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP [5005-2A]
Computer Points :
C11NC033, C11NC034, C11NC035, C11NC036 RPS TRIP - Yes, Reactor Scram.
Prevented by verification of coincident logic not tripped.
CRVICS ISOLATION - No impact REQUIRED OPERABLE CHANNELS - (4 per function) -
When a channel is placed in an inoperable status solely for performance of required Surveillances, entry into associated Conditions and Required Actions may be delayed for up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> provided the associated Function maintains RPS trip capability.
PLANT/SYSTEM OPERATIONAL REQUIREMENTS :
May be performed in all plant conditions.
COINCIDENT CHANNELS TO PREVENT ACTUATION 5.5 Operations :
Verify following :
AND CPS 9431.22 Channel Under Test Channels Not Tripped Cll-NO13A Cll-N013B, C, D Cll-NO13B Cll-N013A, C, D Cll-NO13C C11-N013B, A, D Cll-NO13D Cll-N013B, C, A SMngmt IMD Rev.
37 Page 6 of 29 INITIAL 1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window, 2A reset, IV
/
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A reset, IV
/
5.6 Obtain Shift management permission prior to performing this test.
NOTE Date Time SMngmt Person Notified CPS 9431.22 5.7 Notify QA that verifications may be needed for performance of section 8.2.
The Float Switch Isolation valves are secured with chain and lock while Test Connection valves are secured with lock wire.
5.8 Obtain permission from Shift Management to authorize manipulation of LOCKED/SEALED valves in the following steps :
Date Time SMngmt 5.9 Verify, then UNLOCK Lock, remove chain, and SHUT applicable Isolation Valve :
INITIAL Rev.
37 Page 7 of 29 Channel Cll-NO13A Upper Isolation Valve C11-F155A CV
/
Lower Isolation Valve C11-F158A CV
/
OR Channel Cll-NO13B Upper Isolation Valve C11-F155B CV
/
Lower Isolation Valve Cll-F158B CV
/
OR Channel Cll-NO13C Upper Isolation Valve Cll-F155C CV
/
Lower Isolation Valve Cll-F158C CV
/
OR Channel Cll-NO13D Upper Isolation Valve C11-F155D CV
/
Lower Isolation Valve C11-F158D CV
/
6.0 LIMITATIONS If during performance of this procedure, a Reactor Protection System (RPS) trip occurs, performance of this procedure shall be halted.
Contact Operations for directions prior to restoring channel or recommencing test.
7.0 MATERIALS AND/OR TEST EQUIPMENT 7.1 Test Equipment and Tools 7.1.1 The following is a list of the test equipment required for the performance of this procedure.
Equivalent test equipment may be used.
7.1.2 SDV Cal Test Box 7.1.3 Clear tygon tubing.
7.1.4 12 foot steel tape, no accuracy required.
7.1.5 Flow Control valve, adaptable to tubing.
7.1.6 Isolation valve, adaptable to tubing.
7.1.7 Overflow receptacle.
CPS 9431.22 INITIAL 7.1.8 Compression fittings ; 1 cross, 1 tee, 2 quick disconnects to attach to SS-QF8-S-8PF 7.1.9 Chicago fitting 7.1.10 DMM (Non-quantitative data) 7.1.11 Torque wrench :
Range :
0-300 ft-lbs.
Accuracy :
+/-5%
7.1.12 Valve lock wire.
7.2 Materials and Replacement Parts 7.2.1 0-Ring, E-Tube, Viton E-60C, MFR CD M040, Stock Code NN9122 MFR Part Number 12-2201-215 7.2.2 Gasket, E-Tube, MFRCO M040, Stock Code NP8488 MFR Part Number 089-3612-001 Rev.
37 Page 8 of 29
7.2.3 0-Ring, Housing, Viton E-60C, MFR CD M040, Stock Code SN9421 MFR Part Number 12-2201-249 7.2.4 Kit, Housing Seals, MFR CD M040, Stock Code SZ1425 MFR Part Number 89-6550-001 7.3 Procedures and Documents 7.3.1 CPS 8492.02, ELECTRIC CONDUCTOR SEAL ASSEMBLY 7.3.2 CPS 8673.06, MAGNETROL LEVEL SWITCH MAINTENANCE 8.0 PROCEDURE 8.1 Functional Test and Loop Calibration 8.1.1 Verify the following computer point is RESET.
CPS 9431.22 NOTE Appendix B references the typical valve arrangement for C11-N013A(B). Appendix C references Cl l -N013C(D).
Calibration test medium will be utilizing Cycle Condensate System (CY). Refer to Appendix D for typical M&TE connection diagram.
8.1.2 Using a Chicago fitting connect test medium supply line to applicable valve.
Valve 1CY094D CNTMT BLDG Hose Conn (RED Tape),
Elev 755 Azimuth 240° OR 1C11-N013C(D)
Valve 1CY093D CNTMT BLDG Hose Conn (RED Tape),
Elev 755 Azimuth 65° INITIAL Channel C11-N013A :
C11NC033 OR Channel Cll-N013B :
C11NC034 OR Channel C11-N013C :
C11NC035 OR Channel C11-N013D :
C11NC036
8.1.5 Verify, remove lockwire and OPEN applicable valves CPS 9431.22 Rev.
37 Page 1 0 of 29 INITIAL 8.1.3 Connect test equipment to Float Switch under test using Appendix D as a guide.
The preconstructed test rig may be used, if available.
0 8.1.4 Ensure overflow tube from switch upper test connection and sightglass and drain line from isolation valve to cross fitting are installed and directed to an approved container Channel Cll-NO13A Upper Test Connection Valve C11-F362A CV
/
Cll-F363A CV
/
Lower Test Connection Valve C11-F364A CV
/
C11-F365A CV
/
OR Channel Cll-NO13B Upper Test Connection Valve C11-F362B CV
/
C11-F363B CV
/
Lower Test Connection Valve C11-F364B CV
/
C11-F365B CV
/
OR Channel Cll-NO13C Upper Test Connection Valve C11-F362C CV
/
C11-F363C CV
/
Lower Test Connection Valve C11-F364C CV
/
C11-F365C CV
/
OR Channel Cll-NO13D Upper Test Connection Valve C11-F362D CV
/
C11-F363D CV
/
Lower Test Connection Valve C11-F364D CV
/
C11-F365D CV
/
8.1.6 Verify following :
1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window, 2A reset, AND 2.
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A reset.
OR NOTE 8.1.7 Slowly fill float switch until applicable annunciator alarms.
CPS 9431.22 INITIAL All level measurements are referenced from lower datum of scram discharge volume. Refer to Appendix B and C for reference.
CAUTION Do not overflow sight glass or test connection when filling float switch.
DIV 1 or 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window 2A alarms for lCll-N013A(D),
p DIV 2 or 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A alarms for lC11-N013B(C) c 8.1.8 (Record)
Record level at which float switch tripped in AS FOUND column of sections A & B of data sheet.
p c 8.1.9 Verify following computer point is TRIPPED.
Rev.
37 Page 1 1 of 29 Channel C11-N013A :
C11NC033 OR Channel C11-N013B :
C11NC034 OR Channel C11-N013C :
C11NC035 OR Channel C11-N013D :
C11NC036
8.1.10 Slowly drain piping leg of float switch until applicable annunciator clears.
DIV 1 or 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window 2A reset for Cll-N013A(D),
OR DIV 2 or 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A reset for C11-N013B(C) 8.1.11 (Record)
Record level at which float switch alarm resets in AS FOUND column of section B of data sheet.
0 8.1.12 Verify following computer point RESET.
CPS 9431.22 c 8.1.13 (Record)
IF all AS FOUND data is acceptable, THEN transfer AS FOUND data to AS LEFT columns and proceed to step 8.4.
p 8.1.14 IF any AS FOUND data is not acceptable, or if adjustments are desired, THEN notify Maintenance Supervision.
p 8.2 Float Switch Adjustment 8.2.1 Notify QA that this section will require Quality verification involvement Person Notified Tech 8.2.2 Notify CRS/RO a fuse will be removed, and float switch leads will be lifted during this section.
Rev.
37 Page 1 2 of 29 INITIAL Channel C11-N013A :
C11NC033 OR Channel C11-N013B :
C11NC034 OR Channel Cll-N013C :
C11NC035 OR Channel C11-N013D :
C11NC036
Rev.
37 Page 1 3 of 29 OR CPS 9431.22 INITIAL 8.2.3 Verify, then remove fuse at following panel :
Cll-NO13A (C71-F55A)
- H13-P661, C-A151-XF03 CV OR Cll-NO13B (C71-F55B)
- H13-P662, C-A151-XF03 CV
/
OR Cll-NO13C (C71-F55C)
- H13-P663, C-A151-XF07 CV OR Cll-NO13D (C71-F55D)
- H13-P664, C-A151-XF07 CV
/
8.2.4 Verify following :
DIV 1 or 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window 2A alarmed for lCll-N013A(D),
OR DIV 2 or 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A alarmed for lC11-N013B(C) 8.2.5 Remove float switch cover.
O 1.
For minor adjustments (<_ 1"), perform step 8.2.5.2.
For major adjustments (> 1"),
proceed to step 8.2.6.
2.
Move trip mechanism to obtain the desired setpoint and proceed to step 8.2.18 8.2.6 Notify Operations that trip verifications are no longer required and operations may place division under test in Sensor Bypass per 3305.01.
OPS 8.2.6.a Verify, then disconnect field wiring from switch :
Cll-NO13A Cable 1RP06B, wire RPA51112 (Black), term 4 CV
/
Cable 1RP06B, wire RPA51113 (White), term 5 CV
/
OR Cll-NO13B Cable 1RP06D, wire RPA51214 (Black), term 4 CV
/
Cable 1RP06D, wire RPA51215 (White), term 5 CV
/
OR Cll-NO13C Cable 1RP06F, wire RPA51301 (Black), term 4 CV Cable 1RP06F, wire RPA51302 (White), term 5 CV
/
8.2.6 (cont
, d)
Cll-NO13D Cable 1RP06H, wire RPA51401 (Black), term 4 CV
/
Cable 1RP06H, wire RPA51402 (White), term 5 CV
/
8.2.7 The following step shall be performed in accordance with CPS 8492.02, ELECTRIC CONDUCTOR SEAL ASSEMBLY.
8.2.8 Disconnect conduit from switch housing and pull away from switch.
p CAUTION The following steps expose float chamber internals.
8.2.9 Notify RP that float chamber internals will be exposed in next step.
8.2.10 Remove switch housing assembly by loosening hex nut located immediately below housing base.
8.2.11 Measure position of upper jam nuts referenced from stem end, and enter the value below. Loosen and remove upper jam nuts, guide washer, and attracting sleeve.
Upper Jam Nut Position inch NOTE scratches, tears, cracks or deformations, and remains soft and pliable.
CPS 9431.22 8.2.12 Loosen and adjust lower jam nuts the distance actuation occurred above Acceptable Limit.
Do not exceed 1 inch differential or less than 0.3 inch.
Tighten jam nuts snug tight.
8.2.13 Replace attracting sleeve, guide washer, and upper jam nuts.
Verify upper jam nuts are locked into original position.
Elastomers (0-rings) and gaskets may be reused provided they are free of nicks, cuts, Rev.
37 Page 1 4 of 29 INITIAL EQ c 8.2.14 Reassemble switch housing and torque hex nut in accordance with CPS 8673.06, MAGNETROL LEVEL SWITCH MAINTENANCE.
O
CPS 9431.22 c 8.2.15 Reinstall electrical conduit to switch housing in accordance with CPS 8492.02, ELECTRIC CONDUCTOR SEAL ASSEMBLY.
11 8.2.16 Pull in field wiring, wrap ends around enclosing tube under baffle plate.
Ensure that excess wire does not interfere with "tilt" of switch and that adequate clearance exists for replacement of switch housing cover.
8.2.17 Reconnect wires to the following terminals and tighten to snug tight.
INITIAL Rev.
37 Page 1 5 of 29 Cll-N013A Cable 1RP06B, wire RPA51112 (Black), term 4 IV
/
Cable 1RP06B, wire RPA51113 (White), term 5 IV
/
OR Cll-N013B Cable 1RP06D, wire RPA51214 (Black), term 4 IV
/
Cable 1RP06D, wire RPA51215 (White), term 5 IV
/
OR Cll-NO13C Cable 1RP06F, wire RPA51301 (Black), term 4 IV Cable 1RP06F, wire RPA51302 (White), term 5 IV
/
OR Cll-NO13D Cable 1RP06H, wire RPA51401 (Black), term 4 IV
/
Cable 1RP06H, wire RPA51402 (White), term 5 IV
/
8.2.17.a IF Operations placed division under test in Sensor Bypass THEN notify Operations to restore Sensor Bypass switch to normal per CPS 3305.01 to allow channel calibration to continue.
OPS 8.2.18 Replace switch housing cover and tighten snug tight.
IV
Channel Cll-NO13A Upper Test Connection Valve C11-F362A C11-F363A Lower Test Connection Valve C11-F364A C11-F365A OR Rev.
37 Page 1 6 of 29 CPS 9431.22 INITIAL 8.2.19 Replace applicable control circuit fuse :
Cll-NO13A (C71-F55A) : H13-P661, C-A151-XF03 IV
/
OR Cll-NO13B (C71-F55B)
- H13-P662, C-A151-XF03 IV
/
OR C11-N013C (C71-F55C)
- H13-P663, C-A151-XF07 IV
/
OR Cll-NO13D (C71-F55D)
- H13-P664, C-A151-XF07 IV
/
8.2.20 Verify the following :
1.
DIV 1 or 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window 2A is reset for C11-N013A(D),
OR 2.
DIV 2 or 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A is reset for C11-N013B(C) 8.2.21 Verify the following computer point is RESET :
Channel C11-N013A :
C11N033 OR Channel C11-N013B :
C11N034 OR Channel Cl1-N013C :
C11N035 OR Channel C11-N013D :
C11N036 8.2.22 Notify CRS/RO that switch has been reassembled, wires connected, and fuse restored.
8.3 Post Adjustment Loop Calibration 8.3.1 Verify applicable valves are OPEN :
8.3.2 Slowly fill float switch until applicable annunciator alarms :
OR 9431.22 Rev.
37 Page 1 7 of 29 INITIAL CAUTION Do not overflow sight glass or test connection when filling float switch.
DIV 1 or 4 SCRAM DIS VOL HI WTR TRIP annunciator 5004 window 2A alarms for lCll-N013A(D) p DIV 2 or 3 SCRAM DIS VOL HI WTR TRIP annunciator 5005 window 2A alarms for 1C11-N013B(C) p c 8.3.3 (Record)
Record level at which float switch tripped in AS LEFT column of sections A & B of data sheet p
8.3.4 Slowly drain the piping leg of float switch until applicable annunciator resets.
0 8.3.1 (cont'd)
CPS Channel Cll-NO13B Upper Test Connection Valve Cll-F362B Cll-F363B Lower Test Connection Valve Cll-F364B C11-F365B OR Channel Cll-NO13C Upper Test Connection Valve Cll-F362C C11-F363C Lower Test Connection Valve Cll-F364C C11-F365C OR Channel Cll-NO13D Upper Test Connection Valve C11-F362D C11-F363D Lower Test Connection Valve C11-F364D C11-F365D
8.3.5 (Record)
Record level at which float switch alarm resets in OTHER DATA AS LEFT column of section B of data sheet 8.3.6 IF any AS LEFT data is not acceptable, THEN notify Maintenance Supervision and Shift Management.
8.4 System Restoration 8.4.1 Contact CRS/RO to determine status of following SDV Vent and Drain Valves [5005]
1.
SCRAM DISCH VOL VENT V Cll-FO10 2.
SCRAM DISCH VOL VENT V Cll-F180 3.
SCRAM DISCH VOL DR V Cll-F011 4.
SCRAM DISCH VOL DR V C11-F181 8.4.2 IF all four SDV Vent and Drain Valves are OPEN, THEN perform steps 8.4.3 through 8.4.12, OTHERWISE go to step 8.4.14.
8.4.3 CLOSE the two upper test connection valves for the channel under test :
Cll-F362A(B,C,D) and Cll-F363A(B,C,D)
Cll-F364A(B,C,D) and Cll-F365A(B,C,D)
Cll-Fl55A(B,C,D)
Cll-Fl58A(B,C,D)
CPS 9431.22 8.4.4 CLOSE the two lower test connection valves for the channel under test :
8.4.5 Slowly OPEN Upper Isolation valve for channel under test :
8.4.6 OPEN Lower Isolation Valve for channel under test :
SHUT OPEN Rev.
37 Page 1 8 of 29 INITIAL 8.4.7 Allow several minutes for SDV Float Switch under test to drain into SDV Tank and drain line.
8.4.8 CLOSE Upper and Lower Isolation Valves for channel under test :
Cll-Fl55A(B,C,D) and Cll-F158A(B,C,D) 8.4.9 OPEN the two upper test connection valves for the channel under test :
Cll-F362A(B,C,D) and Cll-F363A(B,C,D) 8.4.10 OPEN the two lower test connection valves for the channel under test Cll-F364A(B,C,D) and Cll-F365A(B,C,D) 8.4.13 Proceed to step 8.4.15.
8.4.15 Verify the following :
1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator reset [5004 - 2A] for Cll-N013A(D)
OR DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator reset [5005 - 2A] for Cll-N013B(C)
AND NOTE CPS 9431.22 8.4.11 IF used, THEN open Test Rig drain valve to drain water.
INITIAL 8.4.12 Allow several minutes for any remaining water in sensing lines to the SDV Float Switch under test to drain.
p Following step is to be performed if all four SDV Vent and Drain Valves are NOT open.
8.4.14 Drain SDV Float Switch and its sensing lines to water supply container.
p 2
Computer point C11NC033(34,35,36) indicates RESET.
Rev.
37 Page 1 9 of 29
8.4.16 CLOSE/verify closed applicable valves and re-IV
/
IV
/
IV
/
IV
/
IV
/
IV
/
IV
/
IV
/
CPS 9431.22 INITIAL IV
/
IV
/
IV
/
IV
/
IV
/
IV
/
IV
/
IV
/
8.4.17 Disconnect temporary sightglass, overflow tubing and water supply.
IV
/
8.4.18 Replace protector cap on the upper test connection.
IV
/
8.4.19 Replace protector cap on the lower test connection.
IV
/
Rev.
37 Page 2 0 of 29 install LOCK WIRE.
Channel Cll-NO13A Upper Test Connection Valve Cll-F362A C11-F363A Lower Test Connection Valve Cll-F364A Cll-F365A OR Channel Cll-NO13B Upper Test Connection Valve Cll-F362B C11-F363B Lower Test Connection Valve C11-F364B Cll-F365B OR Channel Cll-NO13C Upper Test Connection Valve Cll-F362C C11-F363C Lower Test Connection Valve C11-F364C C11-F365C OR Channel Cll-NO13D Upper Test Connection Valve C11-F362D Cll-F363D Lower Test Connection Valve C11-F364D Cll-F365D
8.4.20 Operations OPEN/verify open applicable valves and re-install LOCK and CHAIN.
8.4.21 Notify CRS/RO of following :
1.
Isolation Valves OPENED and LOCKED OPEN 2.
Test connection valves SHUT and LOCKWIRED 8.4.22 Verify the following :
1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator reset [5004 - 2A]
AND 2
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator reset [5005 - 2A].
8.4.23 Verify all the information contained on the procedure is complete and accurate.
CPS 9431.22 8.4.24 Notify Shift Management of procedure completion.
DATE TIME TECH Rev.
37 Page 2 1 of 29 INITIAL Channel Cll-NO13A Upper Isolation Valve C11-F155A IV
/
OPS IMD Lower Isolation Valve Cll-F158A IV
/
OPS IMD OR Channel Cll-NO13B Upper Isolation Valve C11-F155B IV
/
OPS IMD Lower Isolation Valve Cll-F158B IV
/
OPS IMD OR Channel Cll-NO13C Upper Isolation Valve Cll-F155C IV
/
OPS IMD Lower Isolation Valve Cll-F158C IV
/
OPS IMD OR Channel Cl1-N013D Upper Isolation Valve C11-F155D IV
/
OPS IMD Lower Isolation Valve C11-F158D IV
/
9.0 ACCEPTANCE CRITERIA 9.1 Operability Requirements Failure to meet Acceptance Criteria given below shall constitute a failure to comply with applicable LCO.
Refer to Supplemental Review Sheet for applicable LCOs.
9.1.1 The AS LEFT Float Switch TRIP value is within Allowable Limit specified in Section A of data sheet.
9.1.2 Computer point Trip Function occurred as specified.
9.2 Other Data Requi rements The AS LEFT Float Switch TRIP value is within Acceptable Limits specified in Section B of data sheet.
If data recorded exceeds Acceptable Limits, notify Maintenance Supervision.
10.0 FINAL CONDITIONS CPS 9431.22 Instruments are operating properly and annunciators are reset.
Rev.
37 Page 22 of 29
11.0 REFERENCES 11.1 Requirements c 11.1.1 Channel Functional Test
" CPS ITS SR 3.3.1.1.9 T8.b (step 8.1.9)
CPS 9431.22 c 11.1.2 Channel Calibration
" CPS ITS SR 3.3.1.1.13 T8.b (step 2.1.1, 8.1.8, 8.1.13, 8.3.3) c 11.1.3 Logic System Functional
" CPS ITS SR 3.3.1.1.15 T8.b (step 2.1.1, 8.1.9) 11.1.4 CPS ITS 3.10.4 and 3.10.5 11.1.5 USAR - 7.2.1.1.4.2 11.2 Procedures 11.2.1 WC-AA-111, PREDEFINE PROCESS 11.2.2 MA-AA-716-008, FOREIGN MATERIAL EXCLUSION PROGRAM 11.2.3 CPS 9531.22, SDV HIGH WATER LEVEL FLOAT SWITCH Cll-NO13A (B,C,D) CHANNEL FUNCTIONAL 11.2.4 OP-CL-109-101, CLEARANCE AND TAGGING 11.2.5 CPS 8492.02, ELECTRIC CONDUCTOR SEAL ASSEMBLY 11.2.6 PMSO-058, CONTROL OF LOCKED VALVES 11.2.7 CPS 8673.06, MAGNETROL LEVEL SWITCH MAINTENANCE 11.3 Documents c 11.3.1 EQ Manual :
MS-02.00, MAINTENANCE OF EQUIPMENT QUALIFICATION PROGRAM MANUAL, CL050A (step 8.2.14) and CL094 (step 8.2.15, 8.2.14) 11.3.2 S&L Setpoint Log, C11-01 11.3.3 E02-1RP99, sht. 2A, 10, 10A, 25, 30 11.3.4 E03-1P661-606, 681 11.3.5 E03-1P662-606, 674 11.3.6 E03-1P663-604, 605, 651 Rev.
37 Page 23 of 29
11.3.7 E03-1P664-604, 605, 647 11.3.8 E03-1RP00-001 11.3.9 E02-1RD99, sht.
3 and 4 11.3.10 OS-1078, sht.
2 11.3.11 K2801-0173, GEK 75666 Volume I, Tab 10, Magnetrol Model 751 Level Switch 11.3.12 Foreign Drawing CLN-001 Sheet 2 (K2887) 11.3.13 CWR 19802 (Scram Discharge Volume Elevations) 11.3.14 FECN 14704 (Setpoint and Datum Elevation changes for Level Switches 11.4 Commitments None 12.0 APPENDICES 13.0 DOCUMENTS CPS 9431.22 A.
FLOAT SWITCH ASSEMBLY B.
LEVEL SWITCH A(B) CONFIGURATION C.
LEVEL SWITCH C(D) CONFIGURATION D.
TYPICAL MEASURING AND TEST EQUIPMENT HOOKUP CPS 9431.22D001, SDV HIGH WATER LEVEL FLOAT SWITCH C11-N013A(B,C,D) CHANNEL CALIBRATION DATA SHEET Rev.
37 Page 2 4 of 29
CORRECTIVE ACTION TAKEN Operability Acceptance Criteria ITS LCOs 3.3.1.1 3.10.4 3.10.5 As applicable Issue Report No.
Other Acceptance Criteria As applicable Issue Report No.
COMMENTS/DEFICIENCIES SUPPLEMENTAL REVIEW SHEET CPS 9431.22 Rev.
37 Page 2 5 of 29
APPENDIX A FLOAT SWITCH ASSEMBLY CPS 9432.22
F363A F362A 762#1118' DATUM 758'-- 7/8" _TOP OF WELD NOTE: REFERENCE MARK ON FLOAT CHAMBER SHOULD BE ALIGNED TO CORRESPOND WITH LIQUID LEVEL IN VESSEL AT WHICH SWITCH CONTROL IS DESIRED
1011 NO13D TRIP-?MINT Z6 '-_1_1I8" NOTE: REFERENCE MARK ON FLOAT CHANBER SHOULD BE ALIGNED TO CORRESPOND WITH LIOVID LEVEL IN VESSEL AT WHICH SWITCH CONTROL IS DESIRED.
F3 63D F3 62D F3 63C F3 62C 762'- J /4-u 1011 N01 30
6 LOWER TEST CONNECTION VALVES SIGHTGLASS REGULATING VALVE DRAIN VALVE r
DRAIN RECEPTICAL (Cn CHICAGO FITTING
ATTACHMENT 4 CPS Procedure No. 9531.22, "SDV High Water Level Float Switch C11-N013A (B, C, D) Channel Functional" Revision 38
O O
CPS 9531.22 SDV HIGH WATER LEVEL FLOAT SWITCH Cll-N013A(B,C,D) CHANNEL FUNCTIONAL SCOPE OF REVISION:
Incorporate EC 364183, use of quick disconnect test fittings.
lore/ l-CONTlNUOUSUSE ORIGINATOR : Doug Beese CLASS CODE : SNNN SQR : David Long APPROVAL DATE : May 16, 2007 CURRENT CHANGES TO GENERAL REVISION Change #
Date List of Affected Pages Rev.
38 Page 1 of 18
1.0 PURPOSE 1.1 To perform of a Channel Functional test on the Scram Discharge Volume High Water Level Float Channel 1C11-NO13A (B,C,D) 1.2 Performance of this procedure fully satisfies CPS ITS SR 3.3.1.1.9 T8.b for the channel tested.
2.0 DISCUSSION/DEFINITIONS 2.1 Discussion 2.1.1 Frequency :
<<LBD-1>>
1.
Normal Frequency - Performed every 92 days.
2 Other Triggers - None.
2.1.2 This procedure includes the steps necessary to perform the Channel Functional of this instrument channel up to the point where this channel converges with other channels.
This channel provides a signal for an Automatic Scram.
2.1.3 The components in the loop are as follows :
CPS 9531.22 2.1.4 This procedure and data sheet shall be routed to the Surveillance Coordinator and vaulted in accordance with CPS 1011.02, Implementation and Control Of Surveillance Testing.
Rev.
38 Page 2 of 18 Loop A : Float Switch :
Cll-NO13A CNT-237°-762 Annunciator :
Window 2A (H13-P680-05A)5004 Computer Point C11NC033 C91-P620 Loop B : Float Switch :
Cll-NO13B CNT-237°-762 Annunciator :
Window 2A (H13-P680-06A)5005 Computer Point :
C11NC034 C91-P620 Loop C
- Float Switch :
Cll-NO13C CNT-122°-762 Annunciator Window 2A (H13-P680-06A)5005 Computer Point :
C11NC035 C91-P620 Loop D : Float Switch :
Cll-NO13D CNT-122°-762 Annunciator :
Window 2A (H13-P680-05A)5004 Computer Point :
C11NC036 C91-P620
2.2 Definitions Shift Management - SMngt - This refers to Operations On-Shift Management positions of Shift Manager (SM), Work Coordination Supervisor (WCS), Control Room Supervisor (CRS), and Field Supervisor (FS) with a SRO License.
3.0 RESPONSIBILITY The Manager - Instrument Maintenance Department (IMD) shall be responsible for the implementation and review of this procedure 4.0 PRECAUTIONS 4.1 Improper implementation of this procedure could result in a Reactor Scram.
Ensure the performance of this Channel Functional does not satisfy any logic functions which would cause an unwanted response.
(Refer to step 5.6) 4.2 Water drained from the float switch will be contaminated.
Observe all appropriate Radiological Work Precautions.
4.3 Ensure cleanliness requirements are maintained in accordance with CPS 1019.02, System Cleanliness.
5.0 PREREQUISITES CPS 9531.22 5.1 Circle the channel number being tested below ;
Channel A
B C
D 5.2 In conjunction with Shift Management, review the following impact statements to determine required plant status to perform this test-
5.3 In conjunction with Shift Management, review the following impact statements and referenced operability Impacts to determine required plant status to perform this test OPERABILITY IMPACTS CPS ITS LCO 3.3.1.1, Reactor Protection System (RPS) Instrumentation, Table 3.3.1.1-1, item ;
8 Scram Discharge Volume Water Level - High b. Float Switch SYSTEMS AFFECTED :
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP [5004-2A]
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP [5005-2A]
Computer Points :
C11NC033, C11NC034, C11NC035, C11NC036 RPS TRIP - Yes, Reactor Scram.
Prevented by verifying of coincident logic not tripped.
CRVICS ISOLATION - No impact COINCIDENT CHANNELS TO PREVENT ACTUATION Channel Under Test Channels Not Tripped Cll-NO13A C11-N013B, C, D Cll-NO13B Cll-N013A, C, D Cll-NO13C Cll-N013B, A, D Cll-NO13D C11-N013B, C, A PLANT/SYSTEM CONDITIONS ASSUMED FOR TEST May be performed in all plant conditions.
SWITCH PHONE JACK Cll-NO13A H22-P022, F10 Cll-NO13B H22-P022, F10 Cll-NO13C H22-P010, G08 Cll-NO13D H22-P010, G08 NOTE CPS 9531.22 The Float Switch Isolation valves are secured with chain and lock while Test Connection valves are secured with lock wire.
5.7 Obtain permission from Shift management to authorize manipulation of LOCKED/SEALED valves in the following steps Date Time SMngt Rev.
38 Page 5 of 18 INITIAL 5.4 Obtain Shift Management permission prior to performing this test.
SMngt DATE TIME 5.5 Operations :
Verify the following :
1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator reset [5004 - 2A]
IV
/
OPS/IMD AND 2.
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator reset [5005 - 2A]
IV
/
OPS/IMD 5.6 Establish communications between the Main Control Room (MCR) and the Level Switch Cll-N013A(B,C,D)
Suggested phone jacks are listed.
5.8 Operations :
Verify, then UNLOCK Lock, remove chain, and SHUT applicable Isolation Valve :
CPS 9531.22 INITIAL If during the performance of this procedure a Reactor Protection System (RPS) trip occurs, performance of this procedure shall be halted.
Coordinate with the Shift management for channel restoration.
6.0 LIMITATIONS Channel Cll-NO13A Upper Isolation Valve lC11-F155A CV OPS IMD Lower Isolation Valve 1C11-F158A CV OPS IMD OR Channel Cll-NO13B Upper Isolation Valve 1Cll-F155B CV OPS IMD Lower Isolation Valve 1C11-F158B CV OPS IMD OR Channel Cll-NO13C Upper Isolation Valve lC11-F155C CV OPS IMD Lower Isolation Valve lCll-F158C CV OPS IMD OR Channel Cll-NO13D Upper Isolation Valve 1C11-F155D CV OPS IMD Lower Isolation Valve 1C11-F158D CV OPS IMD
7.0 MATERIALS/TEST EQUIPMENT 7.1 The following is a list of test equipment required for the performance of this procedure.
Equivalent test equipment may be used.
7.2 2 pieces, 10 feet, 3/8", tubing with fittings to connect to quick disconnects (QF8-S-8PF) 7.3 Chicago fitting 7.4 Scram Discharge volume test rig 7.5 Steel tape measure, 8', no accuracy required 7.6 Lockwire pliers and lockwire 8.0 PROCEDURE 8.1 Functional Test 8.1.1 Verify computer point C11NC033(34,35,36) indicates RESET.
NOTE Appendix A shows typical valve arrangement for C11-N013A(B).
Appendix B shows typical valve arrangement for Cll -N013C(D).
CPS 9531.22 1Cll-N013A(B) 1C11-N013C(D)
INITIAL Calibration test medium will be utilizing Cycle Condensate System (CY). Appendix C shows typical M&TE connection diagram.
8.1.2 Using a Chicago fitting connect test medium supply line to applicable valve.
p 8.1.3 Connect test equipment to Float Switch under test using Appendix C as a guide.
The preconstructed test rig may be used, if available.
p Valve 1CY094D CNTMT BLDG Hose Conn (RED Tape),
Elev 755 Azimuth 240° OR Valve 1CY093D CNTMT BLDG Hose Conn (RED Tape),
Elev 755 Azimuth 65°
8.1.4 Ensure overflow tube from switch upper test connection and sightglass and drain line from isolation valve to cross fitting are installed and directed to an approved container.
p 8.1.5 Verify, remove lockwire, and OPEN applicable valves :
(Refer Appendices A and B)
CPS 9531.22 INITIAL Rev.
38 Page 8 of 18 Channel Cll-NO13A Upper Test Connection Valve C11-F362A CV
/
C11-F363A CV Lower Test Connection Valve C11-F364A CV C11-F365A CV OR Channel Cll-NO13B Upper Test Connection Valve C11-F362B CV C11-F363B CV Lower Test Connection Valve C11-F364B CV C11-F365B CV OR Channel Cll-NO13C Upper Test Connection Valve C11-F362C CV C11-F363C CV Lower Test Connection Valve C11-F364C CV
/
C11-F365C CV
/
OR Channel Cll-NO13D Upper Test Connection Valve C11-F362D CV
/
C11-F363D CV Lower Test Connection Valve C11-F364D CV C11-F365D CV
8.1.6 Verify following :
1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator reset [5004 - 2A],
AND 2
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator reset [5005 - 2A],
CPS 9531.22 INITIAL Do not overflow sight glass or test connection when filling float switch.
8.1.7 Slowly fill float switch until applicable annunciator alarms.
<<LBD-1>>
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator [5004-2A] for Cll-N013A(D)
OR DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator [5005-2A] for Cll-N013B(C) 8.1.8 Verify Computer point C11NC033(34,35,36) indicates TRIPPED.
8.1.9 Verify trip occurred below the applicable OPERABILITY Allowable Value, referenced to the bottom of SDV.
(Refer to Appendices A and B for DATUM point)
<<LBD-1>>
Switch Allowable Value Cll-NO13A 62 3/8 Inches Cll-NO13B 62 3/8 Inches Cll-NO13C 60 13/16 Inches Cll-NO13D 60 13/16 Inches 8.1.10 Contact CRS/RO to determine status of following SDV Vent and Drain Valves [5005]
1 SCRAM DISCH VOL VENT V Cll-FO10 2
SCRAM DISCH VOL VENT V C11-F180 3.
SCRAM DISCH VOL DR V C11-F011 4.
SCRAM DISCH VOL DR V C11-F181 SHUT OPEN Rev.
38 Page 9 of 18
8.1.11 IF all four SDV Vent and Drain Valves are OPEN, THEN perform steps 8.1.12 through 8.1.21, OTHERWISE go to step 8.1.23.
8.1.12 CLOSE the two upper test connection valves for the channel under test :
Cll-F362A(B,C,D) and Cll-F363A(B,C,D) 8.1.13 CLOSE the two lower test connection valves forthe channel under test Cll-F364A(B,C,D) and Cll-F365A(B,C,D) 8.1.14 Slowly OPEN Upper Isolation Valve for channel under test :
Cll-Fl55A(B,C,D)
CPS 9531.22 8.1.15 OPEN Lower Isolation Valve for channel under test Cll-Fl58A(B,C,D) 8.1.16 Allow several minutes for SDV Float Switch under test to drain into SDV Tank and drain line.
8.1.17 CLOSE Upper and Lower Isolation Valves for channel under test Cll-Fl55A(B,C,D) and Cll-Fl58A(B,C,D) 8.1.18 OPEN the two upper test connection valves for the channel under test :
Cll-F362A(B,C,D) and Cll-F363A(B,C,D) 8.1.19 OPEN the two lower test connection valves for the channel under test :
Cll-F364A(B,C,D) and Cll-F365A(B,C,D) 8.1.20 IF used, THEN open Test Rig drain valve to drain water Rev.
38 Page 1 0 of 18 INITIAL 8.1.21 Allow several minutes for any remaining water in sensing lines to the SDV Float Switch under test to drain.
p
8.1.22 Proceed to step 8.1.24.
Following step is to be performed if all four SDV Vent and Drain Valves are NOT open.
8.1.23 Drain SDV Float Switch and its sensing lines to water supply container 0
8.1.24 Verify the following :
1.
DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator reset [5004 - 2A] for Cll-N013A(D) ;
OR DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator reset [5005 - 2A] for Cll-N013B(C)
OR AND 8.2 System Restoration NOTE CPS 9531.22 2.
Computer point C11NC033(34,35,36) indicates RESET.
8.2.1 CLOSE/verify closed applicable valves and re-Rev.
38 Page 1 1 of 18 INITIAL install LOCK WIRE.
Channel Cll-NO13A Upper Test Connection Valve C11-F362A IV
/
C11-F363A IV
/
Lower Test Connection Valve C11-F364A IV
/
C11-F365A IV
/
OR Channel Cll-NO13B Upper Test Connection Valve C11-F362B IV
/
C11-F363B IV
/
Lower Test Connection Valve C11-F364B IV
/
C11-F365B IV
/
OR Rev.
38 Page 1 2 of 18 CPS 9531.22 INITIAL 8.2.1 (cont, d)
Channel Cll-NO13C Upper Test Connection Valve C11-F362C IV
/
C11-F363C IV
/
Lower Test Connection Valve C11-F364C IV
/
C11-F365C IV
/
OR Channel Cll-NO13D Upper Test Connection Valve C11-F362D IV
/
C11-F363D IV
/
Lower Test Connection Valve C11-F364D IV
/
C11-F365D IV
/
8.2.2 Disconnect temporary sightglass, overflow tubing and water supply.
IV
/
8.2.3 Replace protector cap on the upper test connection.
IV
/
8.2.4 Replace protector cap on the lower test connection.
IV
/
8.2.5 Operations :
OPEN/verify open applicable valves and re-install LOCK and CHAIN.
Channel Cll-NO13A Upper Isolation Valve C11-F155A IV
/
OPS IMD Lower Isolation Valve C11-F158A IV
/
OPS IMD OR Channel Cll-NO13B Upper Isolation Valve C11-F155B IV
/
OPS IMD Lower Isolation Valve C11-F158B IV
/
OPS IMD OR Channel Cll-NO13C Upper Isolation Valve C11-F155C IV
/
OPS IMD Lower Isolation Valve C11-F158C IV
/
MD MD 9.0 ACCEPTANCE CRITERIA 9.1 Operability Requirements Step 8.1.9 9.2 Other Requirements DATE TIME TECH Failure to meet the Acceptance Criteria given below shall constitute a failure to comply with the applicable LCO.
Refer to Supplemental Review Sheet for applicable LCOs.
The Float Switch trip initiation occurred below the Tech Spec Allowable Value specified.
All required alarms and computer points responded correctly.
If any step was unacceptable, notify Maintenance Supervision.
Rev.
38 Page 1 3 of 18 CPS 9531.22 INITIAL 8.2.5 (cont
, d)
Channel Cll-NO13D Upper Isolation Valve Cll-F155D IV
/
OPS Lower Isolation Valve C11-F158D IV
/
OPS 8.2.6 Notify CRS/RO of following :
1.
Isolation Valves OPENED and LOCKED OPEN 2.
Test connection valves SHUT and LOCKWIRED 8.2.7 Verify the following :
1 DIV 1 OR 4 SCRAM DIS VOL HI WTR TRIP annunciator reset [5004 - 2A]
AND 2.
DIV 2 OR 3 SCRAM DIS VOL HI WTR TRIP annunciator reset [5005 - 2A]
8.2.8 Verify all the information contained on the procedure is complete and accurate.
8.2.9 Notify Shift Management of procedure completion.
10.0 FINAL CONDITIONS 10.1 Float switch is returned to service and operating properly.
10.2 The applicable SCRAM DIS VOL HI WTR TRIP annunciator is reset.
11.0 REFERENCES 11.1 Licensing Basis Documents 11.1.1 LBD-1 CPS ITS SR 3.3.1.1.9 T8.b 11.1.2 USAR - 4.6.1.1.2.4.2.5, 7.2.1.1.4.4.4, 7.2.1.1.4.2(item 7),
7.2.1.1.4.8 11.2 Procedures 11.2.1 CPS 1011.02, Implementation and Control of Surveillance Testing 11.2.2 CPS 1019.02, System Cleanliness 12.0 APPENDICES 13.0 A.
B.
C CPS 9531.22 11.2.3 CPS 9431.22, SDV High Water Level Float Switch Cll-N013A(B,C,D) Channel Calibration 11.2.4 CPS 3001.01V001, Locked Valve Lineup 11.3 Design/Vendor/Print/Other 11.3.1 S&L Setpoint Log C11-01 11.3.2 E02-1RP99, Sh.
1, 1A, 2, 3, 10, 10A, 25, 26,27, 28, and 30 11.3.3 E02-1RD99, Sh. 3 and 4 11.3.4 CLN-001 Sh.
2, K2887 11.4 Commitments - None LEVEL SWITCH A(B) CONFIGURATION LEVEL SWITCH C(D) CONFIGURATION TYPICAL MEASURING AND TEST EQUIPMENT HOOKUP DOCUMENTS - None Rev.
38 Page 1 4 of 18
DATUM 758'- 7/8" TOP OF WELD 7~t2~.~j$1--1 TRIP POIMT 76?'-1 3/8" NOTE: REFERENCE MARK ON FLOAT CHAMBER SHOULD BE ALIGNED TO CORRESPOND WITH LIQUID LEVEL IN VESSEL AT WHICH SWITCH CONTROL IS DESIRED
1011 NO13D TRIG POINT_T_62'-_1 118" Fl 58D F3 630 N7 173620 0
DATUM 758'- 3/8" TOP OF WELD 762'- 314I 1011 NO1 NOTE : REFERENCE MARK ON FLOAT CHANGER SHOULD BE ALIGNED L F3 64D F3 640 TO CORRESPOND WITH LIQUID LEVEL IN VESSEL AT WHICH F3 65D F365O SWITCH CONTROL IS DESIRED.
F1580
0 z
z m
0 0
s r
<O Fr m=
TYPICAL MEASURING AND TEST EQUIPMENT HOOKUP APPENDIX C CPS 9531.22 ff D
[-TO a
S Q
-Q Rev.
38 Page 17 of 18
CORRECTIVE ACTION TAKEN Operability Acceptance Criteria ITS LCOs 3.3.1.1 As applicable :
Issue Report No.
Other Acceptance Criteria As applicable :
Issue Report No.
COMMENTS/DEFICIENCIES SUPPLEMENTAL REVIEW SHEET CPS 9531.22 Rev.
38 Page 1 8 of 18
ATTACHMENT 5 Exelon Procedure ER-AA-520, "Instrument Performance Trending" Revision 3
E XE'1Vn.
Nuclear 1.
PURPOSE INSTRUMENT PERFORMANCE TRENDING ER-AA-520 Revision 3 Page 1 of 13 Level 3 - Information Use 1.1.
This procedure provides the administrative process to implement an instrument trending program. An instrument trending program is a good engineering practice to monitor the behavior of instrumentation to provide early warning of failure.
1.2.
This program monitors the results of calibrations of applicable instrumentation in the plant and generates periodic reviews of the data collected during these calibrations to determine what instruments are not performing to expectations.
1.3.
This procedure identifies poor performance, which can occur in three basic ways :
1.3.1.
An individual instrument could begin to show signs of failure by not meeting Setting Tolerance or exceeding the Leave Alone Zone (LAZ) for repeated calibrations. This is indicative of potential failure of the instrument at some future time.
1.3.2.
Most or all of the instruments monitoring a specific plant parameter could begin to show signs of failure by not meeting Setting Tolerance or LAZ for repeated calibrations. This is indicative of the instrument being assigned a Setting Tolerance that is too constrictive for the make/model used. If the Setting Tolerance can not be expanded to prevent repetitive failures, then the instrument may not be the correct one for the parameter of concern.
1.3.3.
Most or all of the instruments of a given make/model could begin to show signs of failure by not meeting Setting Tolerance or LAZ for repeated calibrations. This is indicative of the instrument being assigned a Setting Tolerance that is too constrictive for the make/model used. If the Setting Tolerance can not be expanded to prevent repetitive failures, then the instrument may not be the correct one for use.
If this occurs after calibrations were successful, then the potential for a common mode failure exists.
1.4.
This procedure provides control of the As-Found/As-Left data analysis. This program maintains the analysis conducted as part of the 24-month cycle extension project as required by Generic Letter 91-04 for applicable stations.
1.5.
This procedure is applicable to all Exelon Operating Nuclear Stations. All instruments within the stations calibration program that are safety related, tech spec related, Reg. Guide 1.97, or Maintenance Rule instruments shall be included in this program. Those instruments that do not fall into one of the categories listed in the applicability statement are not required to be entered into the out of tolerance and trending program. The stations may choose to include other items in the trending program as they feel appropriate.
- 2.
TERMS AND DEFINITIONS ER-AA-520 Revision 3 Page 2 of 13 1.6.
This procedure allows the sites to choose from several methods of trend data recording. Trending may be accomplished by the use of any of the methods outlined within this procedure. This includes the coded CR method, or by use of the as found condition codes within Passport, or the PIMS as found condition codes, or a suitable instrument "As-Found / As-left" data trending tool.
2.1.
Allowable Value (AV) : The limiting value that the trip setpoint may have when tested periodically, beyond which appropriate action shall be taken. The allowable value provides operability criteria for those setpoints or channels that have a limiting operating condition. This limiting condition is typically imposed by the Technical Specifications, but may also result from regulatory requirements, vendor requirements, design basis criteria or other operational limits.
2.2.
Leave Alone Zone (LAZ) -Applicable to MAROG : The LAZ is a range of acceptable values around a nominal value established by adding or subtracting the required accuracy from the nominal value. When an instrument reading (cardinal point of calibration or trip setpoint) is found within this band during Surveillance Testing or calibration check, no calibration adjustment is required. In special cases, the LAZ can be established as a non-uniform band around a nominal value.
2.3.
Reference Accuracy (RA) : A number or quantity that defines a limit that errors will not exceed, when a device is used under specified operating conditions. Includes the combined effects of linearity, hysteresis, deadband, and repeatability.
2.4.
Setting Tolerance (ST)/As Left Tolerance (ALT) : Inaccuracy or offset introduced into the calibration process due to procedural allowances given to technicians performing the calibration. Proper selection of ST/ALT should take into account the effects of reading error and ease of instrument adjustment. The limits allowed for the "As-left" value of a setpoint or cardinal point during calibration (see Attachment 1).
2.5.
Expanded Tolerance (ET)/As Found Tolerance (AFT) -Applicable to MWROG :
The tolerance established for trending instruments that are found beyond the ST/ALT. This is a generic term that encompasses other terms presently used for an "As-Found" acceptance criteria including Administrative Limit, Reportable Limit, Performance Limit etc. It is the value established by applying the process described in Attachment 1. Trends will be evaluated against this value rather than the Setting Tolerance.
2.6.
Out of Tolerance (OOT) : The condition that exists when the As Found values for an instrument calibration exceed some pre-established limit or tolerance value (ET or LAZ).
3.
RESPONSIBILITIES 3.1.
The Site Engineering Director is responsible for :
3.1.1.
Implementing the site Instrument Trending Program.
3.1.2.
Developing calculations of tolerances pertaining to instruments covered in this procedure with the exception of the "Quick Expanded Tolerance (ET)/As Found Tolerance (AFT)", which is provided for the maintenance supervisors determination and use.
3.2.
The Site Maintenance Director is responsible for :
3.2.1.
Implementing the site Instrument Calibration Program.
3.2.2.
Coding of calibration work order activity cause and repair codes.
3.3.
The Senior Manager, Design Engineering is responsible for:
ER-AA-520 Revision 3 Page 3 of 13 3.3.1.
Updating the drift analysis for the instrumentation at those sites committed to a Drift Monitoring program using the supplied data once each operating cycle.
3.3.2.
Evaluating the Trend Report for indication of common mode failures once per operating cycle.
3.4.
The Senior Manager, Plant Engineering is responsible for :
3.4.1.
Reviewing the trend report and evaluating instruments associated with a system within a month of receipt of the report.
3.5.
The Surveillance Test Coordinator (MAROG only) is responsible for :
3.5.1.
Coding of Surveillance Testing work order activity ST Grade codes.
4.
MAIN BODY ER-AA-520 Revision 3 Page 4 of 13 4.1.
Exceptions - The CR trend codes used in this procedure are a station option. The CR trend codes simply provide the engineer with a way to "bin" all instrument out of tolerances. Therefore, the stations may use the trend codes at their own discretion.
Trend Codes are defined in section 4.2.2.1.D 4.2.
Requirements NOTE A : The calibration program is defined within station specific procedures and shall be incorporated into the station work control process to ensure compliance with technical specifications and station commitments.
NOTE B: This procedure requires that any instrument covered under the applicability stated in section 1.5 of this procedure, that is out of tolerance, is entered into an appropriate trending process and the trends evaluated as described in this procedure 4.2.1.
Reporting Out of Tolerances of instruments or control devices covered by the station Calibration Program for Stations using Passport and CR Trending method.
1.
If an instrument can not be reset to within Setting Tolerance/As Left Tolerance during calibration, then INITIATE a CR to document the information and the instrument will be repaired/replaced. For plants required to collect as-found information, RECORD the information unless the instrument has failed.
2.
A.
If any as-found data is greater than the AV, WRITE a CR (Subject line to read : Inst. OOT, Equipment ID, and "Trend Code 131").
B.
If all as-found data is less than the AV, then WRITE a CR (Subject line to read : Inst. OOT, Equipment ID, and "Trend Code B3").
If the calibration of the instrument/loop had at least one calibration point found outside the Setting Tolerance/As Left Tolerance (i.e. requiring adjustment of the instrument/loop) but the loop is left within the Setting Tolerance/As Left Tolerance, then the following actions are required by maintenance during review of the calibration procedure data :
A.
If an ET/AFT exists (in the controlled Plant Equipment Database or in the calibration procedure data), COMPARE the as-found data to that data and :
2.
If any as-found data is outside the ET/AFT, then proceed to 4.2.1.2. D.
B.
If an ET/AFT does not exist (in the controlled Plant Equipment Database or in calibration procedure data), then :
ER-AA-520 Revision 3 Page 5 of 13 1.
If all as-found data is within the ET/AFT, then document this evaluation on the procedure and close the WR without additional required action.
1.
If the instrument loop provides a Technical Specification automatic initiation function, initiate an ER or AR/AR Eval. to obtain a calculation, ET/AFT, and Allowable Value as required.
2.
If the instrument loop does not provide a Technical Specification automatic initiation function, then proceed to Section 4.2.1.2.C.
C.
DETERMINE a Quick ET/AFT using Attachment 1 and EVALUATE the data against the Quick ET/AFT using the following criteria :
1.
If all of the calibration data are within the Quick ET/AFT, close the WR without further action.
If it is desired to incorporate the ET into the controlled Plant Equipment Database or the calibration procedure, INITIATE an ER or AR / AR Eval. to do so.
2.
If any calibration data is outside the ET/AFT, then proceed to 4.2.1.2.D.
D.
If any data point exceeds the ET/AFT, DETERMINE if any data point exceeds the Allowable Value (AV) for the instrument/ loop using the following process :
1.
If an AV exists for the instrument/loop and a data point exceeds the AV, then WRITE a CR (Subject line to read : Inst. OOT, Equipment ID, and "Trend Code B2", if desired) and notify the shift manager that that instrument loop is potentially inoperable.
If an appropriate instrument data trending tool is used, enter the as found and as left information in addition to writing the CR.
2.
If no AV exists for the instrument loop, then write a CR (Subject line to read : Inst. OOT, Equipment ID, and "Trend Code B4", if desired) indicating that the instrument/loop was outside its ET/AFT OR record the as found and as left data in an appropriate instrument data trending tool.
- 3.
If data point exceeds the ET/AFT but is inside AV, then write a CR (Subject line to read : Inst. OOT, Equipment ID, and "Trend
4.2.2.
Trend Reporting Using The CR Code B4", if desired) OR record the as found and as left data in an appropriate instrument data trending tool.
E.
The threshold for generating an OOT CR for relays, time delay relays, and level switches calibrated by the Electrical Maintenance Department, Operational Analysis Department, or other department performing maintenance and calibration on these devices should continue to be based on the "TOLERANCE" currently stated in calibration procedures. WRITE a CR (Subject line to read : Inst. OOT, Equipment ID, and "Trend Code B4") if the stated tolerance is exceeded.
Note :
The following section, 4.2.2.1 does not apply to stations using PIMS for action tracking and an appropriate instrument data trending tool.
ER-AA-520 Revision 3 Page 6 of 13 1.
To provide for a simple trending process, the CR will be used as the documentation process. CR's written to solely document the trend code of an instrument's calibration should be able to be "closed to trending" (or an equivalent of this) since ER-AA-520 requires periodic reporting. CR's that document inoperability or exceeding tech spec's shall not be closed to trending only. To ensure that the CR will document the necessary information, the following are the minimum requirements that must be included in addition to that normally put in the CR :
A.
As a minimum, ENSURE that the subject field includes : "Instrument Out of Tolerance (OOT)"
B.
On the Originator Screen, ENSURE that the Equipment ID is included and that the Equipment ID represents the loop or instrument that is out of tolerance. Also include reference to applicable procedure, WR or surveillance number.
C.
On the Originator Screen, in the Action Request Description section, ENTER one of the following that most correctly states the degree of Out of Tolerance :
1.
"Calibration Data exceeded the ET/AFT (Quick ET/AFT) but did not exceed the AV. Instrument/loop recalibrated to within ST/ALT." If no ET/AFT previously established and a computed ET/AFT is used, document here.
2.
"Calibration Data exceeded an AV. Instrument/loop recalibrated to within ST/ALT."
3.
"Instrument has failed or can not be recalibrated to within ST/ALT."
In addition, PROVIDE the following information :
ER-AA-520 Revision 3 Page 7 of 13 The magnitude and direction of the as-found value and the ET/AFT/ST/AFT ; that is, whatever tolerances were exceeded.
The Trend Code, as applicable, in both Action Request Description and Subject sections.
D.
On the Originator Screen in the Subject section, one of the following statements should be made (trend codes may be omitted at site discretion) :
1.
"Trend Code B1" - At least one as-found data point exceeded the AV for the instrument or loop and the instrument can not be reset to within ST. Notify shift manager that the instrument loop is potentially inoperable. Repair or replace as appropriate.
2.
"Trend Code 132" - At least one as-found data point exceeded the AV for the instrument or loop and the instrument can be reset to within ST. Notify shift manager that the instrument loop was potentially inoperable. Recalibrate, repair or replace as appropriate.
3.
"Trend Code B3" - No as-found data point exceeded the AV for the instrument or loop and the instrument can not be reset to within ST. Repair or replace as appropriate.
4.
Trend Code 134" - No as-found data exceeded the AV but at least one data point exceeded the ET for the instrument or loop and the instrument can be reset to within the ST. Close CR to trend data point.
4.2.3.
Reporting Out of Tolerances of instruments or control devices covered by the station Calibration Program for Stations using PIMS for trending.
IF an instrument is Out of Tolerance (beyond LAZ), then :
1.
TAKE the appropriate corrective actions in accordance with the applicable site procedures.
- 2.
For Surveillance Testing, DOCUMENT the Test Grade in the PIMS Work Order per the site governing procedure (Ref.6.7)
- 3.
For PIMS corrective / preventive Work Order activities, DOCUMENT the cause and repair codes per the site governing procedure.
A.
DOCUMENT the As-Found and As-Left conditions in the work order Completion Remarks in accordance with MA-MA-716-010-1008, Section 8.5.
B.
DOCUMENT the appropriate Cause and Repair codes on all Work Order activities in accordance with MA-MA-716-010-1008, Exhibits 8.4.1 and 8.5.1.
4.
If already existing, RECORD the As-Found and As-Left data in the instrument calibration program record.
4.2.4.
Reporting Out of Tolerances of instruments or control devices covered by the station Calibration Program for Stations using PASSPORT for trending.
If an instrument is Out of Tolerance ( beyond its setting tolerance ), then :
1.
In Passport document the as found condition in the work order by selecting the appropriate As-Found condition code (summary listing of available codes are in MA-AA-716-011 attachment 2.).
2.
Take appropriate actions per site procedures in generating a CR and notifying station management of potential inoperability.
4.3.
As-Found/As-Left Program 4.3.1.
An As-Found / As-Left Program is required only if the plant has committed to it as part of extending it operating cycle to 24 months.
It may be implemented for other instrumentation at the discretion of the specific plant. The purpose of this program is to maintain a continuing evaluation of instrument drift based on calibration data and to incorporate any increase in observed drift into the appropriate calculations.
1.
Instruments that are required to be trended, will be designated in the appropriate section of the controlled Plant Equipment Database.
ER-AA-520 Revision 3 Page 8 of 13 2.
The Site Design Engineering group will UPDATE the drift analysis for the instrumentation in the Drift Monitoring program using the supplied data once each operating cycle.
4.4.
Trending Program 4.4.1.
The trending program will provide the plant with the analysis of the data provided by the above Sections.
4.4.2.
For Plants using the CR trending approach : Approximately once per operating cycle, Engineering will RUN a Trend Report on the CR database. The trend report should be created by searching on the Subject field for "instrument out of tolerance", "OOT",
"To[" or something similar that will encapsulate all the out of tolerance CR's that
4.4.4.
For Plants using the Passport trending approach : Once per Operating Cycle, Engineering will RUN a Trend Report on the Passport Work Order database As Found condition codes.
ER-AA-520 Revision 3 Page 9 of 13 were generated during the applicable period of time. This report can be sorted by System, Equipment ID, and, as applicable, trend code.
4.4.3.
For Plants using the PIMS trending approach : Once per Operating Cycle, Engineering will RUN a Trend Report on the PIMS Work Order database.
Engineering will REVIEW, at a minimum, Surveillance Test Work Orders with grades of "R", "A", and "U", and Work Orders with Cause Codes equal to "C4" and Repair Codes equal to "AA", "AG", "AH", and "AK".
4.4.5.
Cognizant System Managers shall REVIEW the report and EVALUATE instruments associated with their systems. If a potential problem with the instrumentation on a system is determined, the System Manager should INITIATE a Trending CR to document the specific adverse trend and to evaluate the instrumentation of concern for appropriate corrective action. Instruments to be considered for evaluation are defined as 2 or more CR's over the last 5 calibration periods for a given instrument, OR 2 or more adverse trend codes (Passport or PIMS conditions reports) over the last 5 calibration periods for a given instrument.
4.4.6.
Site Design Engineering will EVALUATE the Trend Report for indication of common mode failures once per operating cycle. If an adverse trend is identified, Design Engineering will INITIATE a Trending CR to evaluate the instrumentation of concern.
1.
Adverse Trend CR's should contain the following :
A.
A description of "instrument out of tolerance trending report".
B.
A listing of what system / instruments were reviewed.
C.
A brief description of the resolution. Possible resolutions include :
1.
Revise calibration acceptance criteria (i.e. ST, AV, ET, LAZ)
- 2.
Increase surveillance / calibration frequency
- 3.
Replace the instrument 4.
Evaluation of correct instrument application 2.
At least once per operating cycle, Site Design Engineering will PERFORM the following for drift analysis as required per site commitment :
A.
For those instruments in the As-Found/As-Left program, Site Design Engineering will UPDATE the drift analysis for the make/model groups.
5.
DOCUMENTATION 5.1.
Trend reports per Section 4.4 6.
REFERENCES B.
For any updated drift value that either is a larger magnitude or changes from time independent to time dependent, a CR will be WRITTEN to require all associated setpoint calculations to be updated.
C.
The required ER's or AR / AR eval. will be WRITTEN for any changes in setpoints or tolerances in accordance with CC-AA-103.
6.1.
Nuclear Engineering Standard NES -EIC-20.04 (includes Industry Standards) 6.2.
Exelon Procedure CC-AA-103, Configuration Change Control 6.3.
Nuclear Design Informational Transmittal, DIT-BRW-2000-004, PIF Threshold for "Out-Of-Tolerance" Reporting for instruments or Channels Which Have Only an Instrument Calibration Setting Tolerance, 1-18-2000.
6.4.
Exelon Procedure LS-AA-105, Operability Determinations 6.5.
Exelon Procedure LS-AA-125, Corrective Action Program 6.6.
Exelon Procedure MA-MA-716-010-1008, Work Order (W/O) Work Performance 6.7.
Site Specific Procedure for Surveillance Testing 6.8.
Exelon Procedure MA-AA-716-011, Work Execution and Closeout.
- 7.
ATTACHMENTS ER-AA-520 Revision 3 Page 1 0 of 13 6.9.
ComEd Licensing submittal to NRC dated March 3, 2000 for technical specification changes for Dresden, Quad Cities, and LaSalle Stations to convert to Improved Standard Technical Specifications.
7.1. : Establishing Setting and Expanded Tolerances/As Found Tolerances (Applicable to MWROG Only)
ATTACHMENT 1 Establishing Setting (As Left) and Expanded (As Found) Tolerances (Applicable to MWROG only)
Page 1 of 3 SETTING (As Left) TOLERANCE :
Establishing a New Setting Tolerance:
ER-AA-520 Revision 3 Page 1 1 of 13 The setting tolerance is selected to allow the technician a band in which an instrument can be left after calibration. This will minimize the amount of adjustment that the technician performs in attempting to set the instrument. This setting tolerance should be included in the evaluation of the uncertainty of the instrument/loop to indicate the monitored process parameter. Allowing too large of a ST can allow too much uncertainty in the loop calibration and/or not allow for detection of potential instrument failure.
In some cases new instruments are added to the plant's equipment, or old instruments have not had a setting tolerance established. The following guidance will be used to select the initial setting tolerance of the instrument :
1.
If the instrument has a Reference Accuracy defined, then that value should be selected as the Setting Tolerance. Some adjustment to this value can be accommodated to provide the technician with easy to read values. This value can be adjusted based on system operability requirements.
- 2.
If the ability of the Measurement & Test Equipment (M&TE) to meet the above ST is not possible then select the ST at the value of the M&TE accuracy. As before, some adjustment to this value can be accommodated to provide the technician with easy to read values. This value can be adjusted based on system operability requirements.
3.
To determine STs for loops or partial loops the Square Root Sum of the Squares (SRSS) of the individual instrument STs can be taken. As before, some adjustment to this value can be accommodated to provide the technician with easy to read values.
ATTACHMENT 1 Establishing Setting (As Left) and Expanded (As Found) Tolerances Page 2 of 3 EXPANDED (As Found) TOLERANCE : (MWROG. onlv)
Note : For some stations, the ET is similar to the LAZ and need not be calculated as directed in this attachment.
The expanded tolerance is a value that incorporates some of the additional uncertainty that can occur between calibrations. This expanded tolerance is very close to an Allowable Value as defined and explained in ISA S67.04 - 1994 Part I and II. The principle involved is that the instrument will show some drift from calibration to calibration and there are intrinsic uncertainties in calibration itself.
If the instrument is in an As-Found state that is within this amount of uncertainty then the instrument is performing as expected in the loop uncertainty calculation. To select an ET perform the following :
CALCULATED ET (BY ENGINEERING) :
ER-AA-520 Revision 3 Page 1 2 of 13 1.
If there is a formal loop uncertainty calculation that has an Allowable Value calculated for the loop and/or any individual instruments, the ET should be the AV or some percentage of the AV.
- 2.
If the calculation does not compute an AV, then the assumed STs for each instrument can be combined with the Drift and Reference Accuracy of the instrument in a SRSS to determine the ET. The ET for the loop will then be the individual ETs in the loop combined in the same manner as the channel uncertainty was determined.
3.
If there is no formal loop uncertainty calculation, then the ET can be computed by conducting a SRSS of the ST, RA and drift of the instrument of concern.
If drift is not known then the value of RA or the specified values in NES-EIC-20.04 can be used. The ET for the loop will then be the SRSS of the individual ETs in the loop.
4.
Other processes have been used in ComEd to compute ETs. These values are still valid and the process, if documented in site procedures, can still be used.
QUICK ETs (AFTs):
The Maintenance Supervisor may need a value to determine the failure code during calibrations when no THE CONTROLLED PLANT EQUIPMENT DATABASE value exists. The following is the acceptable way to compute a quick ET to use for close out of the work package :
1.
If the ST is set at the RA of the instrument, multiply the ST by 1.5 and use this as the ET.
- 2.
If the ST is larger than the RA, then use the ST as the ET.
- 3.
If no RA is available, then multiply the ST by 1.5 and use this product as the ET.
WHERE :
STPT A.L.
S.T.
A.F.
E.T.
A.V.
x,y,z ATTACHMENT 1 Establishing Setting (As Left) and Expanded (As Found) Tolerances Page 3 of 3 Typical Instrument With Setpoint (Example of Decreasing Trip With Allowable Value)
A.V.
Station Setpoints Value "As Left" Value.
Setting Tolerance Value.
"As Found" Value.
Expanded Tolerance Value.
Allowable Value.
Tolerances and Uncertainty Values (Illustration Purposes Only)
ER-AA-520 Revision 3 Page 13 of 13
+(x+Y)%
ET/AFT
+x%
S.T./ALT STPT NOTE : The arrow indicates the A.L.
change made by the technician during calibration.
-x%
S.T./ALT AF
-(X+Y)%
E.T./AFT