ML18064A659

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Responds to NRC Request for Addl Info Re Util 950210 TS Change Request for one-time Deferral of Refueling Interval Surveillance
ML18064A659
Person / Time
Site: Palisades Entergy icon.png
Issue date: 03/27/1995
From: Haas K
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9503290051
Download: ML18064A659 (82)
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I I consumers Power KurtM. Haas POWERING MIUll&All"S PIUl&llESS Plant Safety and Licensing Director Palisades Nuclear Plant: 27780 Blue Star Memorial Highway, Covert, Ml 49043 Mai;ch 27, 1995 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT TECHNICAL SPECIFICATIONS CHANGE REQUEST - ONE TIME DEFERRAL OF REFUELING INTERVAL SURVEILLANCE - ADDITIONAL INFORMATION On February 10, 1995, Consumers Power Company submitted a Technical Specifications change request (TSCR) proposing deferral of several 18 month surveillance requirements. After the submittal of the subject TSCR on February 10, 1995, it was discovered that several of the requested deferrals are not necessary: l} The containment pressure detector testing (TS 4.17.1 #12 & 4.17.3 #1 b&c) will,not become due until after the start of the upcoming refuel fog OJJtage. The testing which was scheduled on April 24 (procedure RI-61\\)--H.. a preliminary test which records the as found settings. That preliminary testing is done early in a refueling outage to assure that as-found data is not affected by containment penetration testing. The actual calibration of these pressure switches and recording of as-left data is done near the end of each refueling outage and will not become due until after the scheduled start of the upcoming refueling outage.

2)

Contrary to the information available at the time of submittal, calibration of the containment atmospheric radioactive gas monitor (TS 4.17.6 #7.b) can be accomplished with the plant operating. The initial evaluation had been that ALARA concerns would prohibit calibration on line; later information determined that it could be done without excessive exposure. That calibration has recently been completed.

3)

The Channel Functional Testing of the boric acid tank low level alarm switches _(TS 4.17_.6 #14) will be completed as scheduled. Therefore, deferral of those surveillance requirements is no longer needed and the request for their deferral will be formally withdrawn when the revised proposed Technical Specifications (TS) pages are submitted. Those revised TS pages and the supporting information are currently being prepared and will be submitted by April 7' 1995. 2_9_0_0<-=5~8~--r"r°"\\ l 9503290051 950327 I PDR. ADOCK -05000255 i - p PDR A-CMS' ENERGY COMPANY -{\\\\I I

On March 7, 1995, during a telephone call between Ms. Janet Kennedy and Mr. Eric Lee of your staff, and Mr. Barry Young of Consumers Power's Palisades Plant staff, Mr. Lee requested additional information regarding the instrumentation to be tested. Specifically, Mr. Lee requested data on instrument drift observed during previous performances of the subject surveillance tests, calculated estimates of the maximum expected drift which might occur if the TSCR is approved, and short discussions of the instruments and test methods involved. Drift projections, with discussions of both the analytical methodology and the interpretations of the results, for the subject instruments are provided as to this letter. Those drift projections are based on the two prior surveillance interval measurements and project the observed drift to June 1, 1995. The plant is scheduled to enter Hot Standby on May 28, 1995 and to be in Cold Shutdown by June 1, 1995. Of the *subject equipment, only the Overpressure Protection System (TS 3.1.8.2 and 4.1) is required to be operable when the plant is in Cold Shutdown. Plant power operation during this fuel cycle will not continue beyond May 28, 1995. The drift projections provided in Attachment 1 show that out of 97 discrete. devices for which 178 projections were developed, only three projections, one for a PCS pressure instrument and two for steam generator level instruments, were projected to drift beyond the TS limit. These three projections are not considered to be valid predictions of expected instrument channel behavior for reasons discussed below. The two projections for the PCS pressure instrument, the input to PA-0102CL (used to initiate a Thermal Margin/Low Pressure reactor trip)*, are very different. The projection based on the first historical interval predicts little drift, with the projected as-found data only 1 psi above the desired actuation point. The projection based on the second interval predicts drift beyond the TS limit. In order to determine if significant drift is actually occurring, the actual input signals being sent to PA-0102CL and to its redundant channels, were measured. The signal to PA-0102CL differed less than 0.2% from the average of its redundant channels. It can be concluded, therefore, that excessive drift of the input to PA-0102CL is not occurring during this operating cycle. Drift in the setting of the bistable device is not in que~tion, since the setting is verified during the monthly Channel Functional Test, for which extension is not being requested. One of the two projections for the input to steam generator level instrument LA-0751A (used to initiate a Low Steam Generator Level reactor trip) predicts drift beyond the TS limit; the other projection predicts drift in the other direction. Measurements of bistable input voltage, similar to those discussed above for PA-0102CL show the input to LS-0752A to be within 0.6% of the average of the inputs to its redundant channels. Since identical drifting of four channels measuring the same parameter is unlikely, it can be concluded, despite the projections, that excessive drift of the input to LA-0751A is not occurring during this operating cycle. One of the two projections for the input to LS-0752A (used to initiate Auxiliary Feedwater) projects it to drift below the TS limit, but only because an actual component failure, a faulty power supply, occurred within the historical data period being examined; that projection, therefore, is considered invalid. The other projection for LS-0752A predicts very little drift.

t There were 18 discrete devices that were projected to exceed their normal 18 month "as found" tolerance when previous drift data was linearly extrapolated to June 1, 1995. Four devices are used for indication only, having no actuation or control function. Nine devices with actuation or control functions had one of the two projections predict drift out of tolerance in the conservative direction; three devices had one of the two projections predict drift out of tolerance in the non-conservative direction; and two devices had both projections out of tolerance, one in each direction. Actual out of tolerance data would necessitate a documented evaluation, but would not necessarily result in the device being declared inoperable. The instrument devices with out of tolerance projections are listed below, noting the Attachment 1 page presenting the data. A discussion of each out of tolerance projection is provided at the end of the associated discussion in Attachment 1.

1)

I/E 0104A, narrow range pressure input to the LTOP computer.

2)

I/E 01048, narrow range pressure input to the LTOP computer.

3)

PA-0102CL, pressure input to the TM/LP reactor trip.

4)

FA-0102A, flow input to the Low PCS Flow reactor trip.

5)

LA-0751A, SG A level* input to the Low SG level reactor trip.

6)

LA-0751C, SG A level input to the Low SG level reactor trip.

7)

LA-07528, SG 8 level input to the Low SG level reactor trip.

8)

LA-0752C, SG 8 level input to the Low SG level reactor trip.

9)

LS-0751A, SG A level input to Auxiliary Feedwater initiation.

10)

LS-0752A, SG 8 level input to Auxiliary Feedwater initiation.

11)

LS-07528, SG 8 level input to Auxiliary Feedwater initiation.

12)

LS-0752C, SG 8 level input to Auxiliary Feedwater initiation.

13)

I/I-0112CC, Loop 1 Temperature input to the Subcooled Monitor.

14)

PI-01058, wide range pressurizer level indication.

15)

HI-1813, containment atmosphere humidity indication.

16)

HI-1814,. containment atmosphere *humidity indication.

17)

PS~0104A, PCS pressure input to the SOC interlock.

18)

PS-01048, PCS pressure input to the SOC interlock. {Page 6) {Page 6) {Page 10) * {Page 15) {Page 18) {Page 19) {Page 20) {Page 21) {Page 32) {Page 34) {Page 34) {Page 35) {Page 46) (Page 51) {Page 65) {Page 66) {Page 70) {Page 70) contains a revised version of the table submitted as Attachment 2 to our February 10, 1995 submittal. The revised table omits the discussion of those deferrals no longe~ required and provides the requested discussions of the involved instruments their and test methods. Summary of Commitments: This letter commits that plant power operation during this fuel cycle will not continue beyond May 28, 1995. I Kurt M. Haas Director, Plant Safety & Licensing CC Administrator, Region III, USNRC Resident Inspector, Palisades Attachments .S .f

ATTACHMENT 1 Consumers Power Company Palisades Plant Docket 50-255 PROPOSED ONE TIME SURVEILLANCE DEFERMENT TECHNICAL SPECIFICATIONS INSTRUMENT DRIFT INFORMATION 70 pages

INSTRUMENT DRIFT INFORMATION Historical and projected drift information is presented for the instrumentation for which a surveillance interval extension is requested. This data is presented in both tabular and graphical form, preceded by a short discussion. The data is arranged in the order of the associated Technical Specifications and labeled with Technical Specification section and instrument title. The tabular portion of the data typically lists the as-left and as-found data for the past two surveillance intervals, along with the intervening interval. Two projected data points are listed, one based on each of the past intervals. The data are limited to two previous intervals because of a change in the Palisades testing methodology which occurred in 1991. Prior to 1991, each component in an instrument loop was tested individually; after 1991, each instrument loop was tested as a unit. The earlier test data is not readily comparable to the later data. The projected data were calculated assuming that drift is a linear function of time. The projected interval is from the most recent calibration to June 1, 1995. The plant is scheduled to enter Hot Shutdown on May 28, 1995 and to be in Cold Shutdown by June 1, 1995. None of the subject equipment is required to be operable when the plant is in Cold Shutdown. GRAPHICAL DATA LEGEND The graphical portion of the data uses the following conventions: Procedural acceptance criterion is plotted as light dashed lines. Technical Specification settings are plotted as a bold dashed line. Data from the first interval is plotted as "X". Data from the second interval is plotted as "+". Data for the current interval is plotted as "*" One actual as-left and two projected data points, one based on each past interval, are plotted Data for automatic functions are the actual value of the measured parameter when the trip device actuated. Data for indicators, or transmitters in loops not having setpoints, are the maximum indicated error observed during the calibration. Maximum indication error is a conservative determination of how much error a particular indicator could display. It was determined by reviewing each set of calibration data and determining the maximum deviation of indicated value from desired indication. This deviation was recorded as a positive or negative value for each calibration. The deviation was not restricted to any particular range or calibration point. As a comparison of the difference between the maximum indication error method and the error at a given calibration point, the humidity sensor analysis was performed at the 40% calibration point. Using the maximum error method the deviation was projected to be -15.1% while the projected value at the 40% calibration point was -8.8%. 1

2 SURVEILLANCE REQUIREMENT 4~1.2 Calibration of each PORV Actuation Channel. The Power Operated Relief Valves (PORVs) are required to be available for automatic action when the primary coolant system (PCS) temperature is below 430°F unless the reactor vessel head is removed (LCO 3.1.8.2). This automatic actuation is initiated by the Low Temperature Overpressure (LTOP) computers. The opening pressure is a function of PCS temperature as required by Technical Specification Figure 3-4. The LTOP computer is armed by a signal from a Temperature switch. It receives both pressure and temperature inputs. If PCS pressure exceeds the calculated setpoint for the existing PCS temperature, an open signal is sent to the PORVs. LTOP Arming Temperature Input TS-0115 and TS-0125 are electronic switches located in the LTOP cabinet in the control room. They receive their signal from RIS Type SC-1373 temperature transmitters located in the control room. The temperature switches are calibrated using the end-to-end calibration method, where a known resistance/temperature is applied to the temperature transmitter and the remaining devices in the loop are monitored. The tolerance stated for TS-0115 and TS-0125 is 5 °F, this is the end-to-end loop tolerance. The purpose of the. end-to-end calibration is to obtain the optimum loop accuracy. All projected values fell within drift tolerance. LTOP Setpoint Computer Temperature Input I/E-0115 and I/E-0125 are current to voltage converter located in the LTOP cabinet in the control room. They receive their signal from RIS Type SC-1373 temperature transmitters located in the control room. The current to voltage converters are calibrated using the end-to-end calibration method, where a known resistance/temperature is applied to the temperature transmitter and the remaining devices in the loop are monitored. The tolerance stated for l/E-0115 and l/E-0125 is 4.5 °F, this is the end-to-end loop tolerance. The purpose of the end-to-end calibration is to obtain the optimum loop accuracy. The I/Es provide the temperature signal to the LTOP computer which calculates the PCS pressure for opening the PORVs to keep from overpressurizing the PCS at low PCS temperatures. All projected values fell within the expect drift tolerance. LTOP Wide Range Pressure Input (0~3000 psia) I/E-0105A and I/E-01058 are current to voltage converters located in the LTOP cabinet in the control room. They receive their signal from Rosemount 1154 transmitters located in the containment air room. The current to voltage converters are calibrated using the end-to-end calibration method, where a known pressure is applied to the pressure transmitter and the remaining devices in the loop are monitored. The tolerance stated for I/E-0105A and B is 30 psia, this is the end-to-end loop tolerance. The purpose of the end-to-end calibration is to obtain the optimum loop accuracy. The I/Es provide the pressure signal to the LTOP computer which is compared to the pressure setpoint calculated from the temperature signal. If the measured pressure exceeds the setpoint, an open signal is sent to the PORVs. All projected values fell within the drift tolerance.

3 LTOP Narrow Range Pressure Input (0-600 psia) I/E-0104A and I/E-01048 are current to voltage converters located in the LTOP cabinet in the control room. They receive their signal from Rosemount 1154 transmitters located in the containment air room. The current to voltage converters are calibrated using the end-to-end calibration method, where a known pressure is applied to the pressure transmitter and the remaining devices in the loop are monitored. The end-to-end loop tolerance stated for I/E-0104A and 01048 is 6 psia. The narrow range pressure circuit provides the same function as the wide range circuit, but is used when temperature is below 300°F to attain increased sensitivity. The projected voltage outputs for I/E-0104A and I/E-01048 using the drift from 1991-1992 is more than 6 psia higher than the desired value. The higher output voltages from I/E-0104A and 8 are conservative because the PORVs would be opened at a PCS pressure below the required setpoint. Since the purpose of the PORVs is to prevent excessive PCS pressure, opening a few psi below the desired setpoint will not compromise their function and would not affect the operability of any other safety function. Testing of the LTOP Computers The LTOP computers themselves are functionally tested every month, in accordance with surveillance requirement 4.l.4(a).

OVERPRESSURE PROTECTION SYSTEM LTOP ARMING 4.1.2 TS-0115 CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING SETPOINT 430 435 1/11/91 3/4/92 435.1 434.9 434.9 420 days DRIFT TOLERANCE 5

6/12/93 434.9 434.9 465 days LL. TS-0125 PROJECTED 6/1/95 434.6 720 days 434.9 TS-0115 440 435 ><---------+~-~-~~ 430 425+--~---+-~~+--~~~~,__~_,__~~~~-+-~~~~ 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING 430 1/11/91 435.1 SETPOINT 435 3/4/92 435.4 435.4 420 days DRIFT TOLERANCE 5

6/12/93 435.2 434.9 465 days LL. PROJECTED 6/1/95 435.5 720 days 434.6 TS-0125 440 435 x-. -. -. -. --+------)!( 430 425+--~---+-~~~~----+-~~~~----+-~~-+-~~~~~~--< 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 4

I/ E-0115 TS SETTING SETPOINT DRIFT TOLERANCE OVERPRESSURE PROTECTION SYSTEM TEMPERATURE INPUT 4.1.2 CALIBRATION

  • F DATE AS FOUND AS LEFT NONE 1/11/91 0.2 N/A 3/4/92 1.0 1.1 4.5 6/12/93 0.9 0.9 PROJECTED 6/1/95 2.1 0.5 INTERVAL 420 days 465 days 720 days MAXIMUM INPUT ERROR 1/E-0115 5

3 u.. 1

  • 1

.3 .5 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 I/ E-0125 CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 1/11/91

-1.3 SETPOINT N/A 3/4/92 -1.2 -1.2 420 days DRIFT TOLERANCE 4.5 6/12/93 -1.2 1.2 465 days PROJECTED 6/1/95 1.3 720 days 1.2 MAXIMUM INPUT ERROR l/E-0125 5 3 )!( u.. -1 ><-*-------+--~~~~+ .3 .5 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 5

I/ E-0105A TS SETTING SETPOINT DRIFT TOLERANCE OVERPRESSURE PROTECTION SYSTEM PRESSURE INPUT, WIDE RANGE 4.1.2 CALIBRATION PSIA DATE AS FOUND AS LEFT NONE 12/17/90 5.4 N/A 3/14/92

  • 1.8
  • 1.8 30 6/15/93 6.0 6.0 PROJECTED 6/1/95

-5.4 18.2 INTERVAL 454 days 458 days 717 days MAXIMUM INPUT ERROR I/ E-0105A 40 20 CZ: Ci) 0 Cl.. X------ --)!(

+-

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  • 20

-40 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 l/E-01058 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING. NONE 12/17/90

  • 6.9 SETPOINT N/A 3/14/92 5.1 5.7 454 days DRIFT TOLERANCE 30 6/15/93 12.0

-6.6 458 days PROJECTED 6/1/95 12.3 717 days 3.3 MAXIMUM INPUT ERROR 40 20 CZ: Ci) 0 Cl..

  • 20

-40 6/27/90 I/ E-01058 ..i..------+ ~---------~ )K )K )K 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 6

I/ E-0104A TS SETTING SETPOINT DRIFT TOLERANCE OVERPRESSURE PROTECTION SYSTEM PRESSURE INPUT, NARROW RANGE 4.1.2 I CALIBRATION PSIA DATE AS FOUND AS LEFT NONE 1/2/91 1.8 N/A 3/4/92 7.8 -0.6 4.5 6/12/93 -1.9 0.6 PROJECTED 6/1/95 10.7 -1.3 INTERVAL 429 days 465 days 720 days MAXIMUM INPUT ERROR I/ E-0104A 20 10 en 0

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  • -x--:.:.-------.:-::::: ::<. --------- -. -- -.;_ ----------- ---- - -- ----

+ )!( -10 -20 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 I/ E-1048 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 1/2/91 0.6 SETPOINT N/A 3/4/92 11.4 0.6 429 days DRIFT TOLERANCE 4.5 6/12/93 -1.8 1.2 465 days PROJECTED 6/1/95 19.3 720 days -2.5 MAXIMUM INPUT ERROR I/ E-1048 20 10 --X c:c en 0

c.

~- + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - :<K -10 -20 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 7

SURVEILLANCE REQUIREMENT 4.17.1 #4 Calibration of the TM/LP Reactor Trip Pressure Sensing Channels Four channels of Thermal Margin/Low Pressure Reactor Trip are required to be operable when there is fuel in the reactor, more than one control rod is capable of being withdrawn, and the PCS is less than refueling boron concentration by LCO 3.17.1. Each channel is actuated by a setpoint calculator the Thermal Margin Monitor (TMM) which receives inputs from PCS pressure, PCS temperature, Axial Shape Index (ASI), and Core Power. The Core Power signal is the greater of AT Power, calculated from a primary calorimetric, and Nuclear Power, from the Power Range nuclear instruments. The TMM calculates a pressure trip setpoint based PCS temperature, ASI, and core power. The pressure trip setpoint has a m1n1mum setting of 1750 psia. The equation for the TM/LP trip setting is listed in Technical Specification Table 2.3.1. Drift data are presented for the PCS pressure inputs. Extension of the surveillance interval for the other inputs is not necessary. Those Instruments are calibrated under a different procedure and were accomplished later in the past refueling outage than the pressure channels. They are not scheduled to be performed until after the forthcoming refueling outage. TM/LP Pressure Inputs PA-0102AL, 0102BL, 0102CL, and 0102DL are electronic bistable switches located within the Reactor Protective cabinets in the control room. These switches receive their signals from the same Rosemount Model 1154 pressure transmitters as the High Pressurizer Pressure bistables. The values plotted are the calibrated test pressure applied to the transmitter which caused the switch to actuate. The projected drift values for PA-Ol02CL based on previous testing, drop below the Technical Specifications limit. The three redundant loops are anticipated to be within Technical Specification requirements. The RPS electronic bistable switch settings are calibrated under a Technical Specification Channel Functional Test each month. The Thermal Margin/Low Pressure bistables are checked (and adjusted if necessary) monthly, thus eliminating them *as a source of error. This leaves the transmitter as the remaining source of drift. Measurements were performed on 3/17/95 with the Plant operating to compare the transmitter outputs of the loop transmitter to the redundant loop transmitters. The input voltages to the bistable trip units were measured. This is the signal the bistable is comparing to it's setpoint. The measurements of the three redundant transmitters were averaged and compared to the PA-0102CL input voltage. The results show that the PA-0102CL transmitter is very close to the average and is not drifting out of the group as indicated bt the projected drift value. The average input voltage for PA-0102AL, BL, and DL is 3.214 Vdc; PA-0102CL input measured 3.220 Vdc. The instrument has a 1 to 5 Vdc span. Therefore, the differance between the average and PA-0102CL is 0.16%. 8

REACTOR PROTECTIVE SYSTEM 9 Thermal Margin I Low Pressure 4.17.1.4 PA-0102AL CALIBRATION PSIA

  • DATE AS FOUND AS LEFT INTERVAL TS SETTING 1750 1/23/91 1761.3 SETPOINT 1760 4/2/92 1760.8 1763.5 43.6 days DRIFT TOLERANCE 10 7/2/93 1763.5 1763.5 457 days PROJECTED 6/1/95 1762.7 700 days 1763.5 PA-0102AL 1770 1765

+------)!( Cii 1760 x- -- --. -. - x Cl.. 1755 1750 - 1745 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PA-0102BL CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 1750 1/23/91 1760.4 SETPOINT 1760 4/2/92 1761.3 1761.6 436 days DRIFT TOLERANCE 10 7/2/93 1762.0 1761.6 457 days PROJECTED 6/1/95 1763.0 700 days 1762.2 PA-0102BL 1770 1765 Cii 1760 x-. -. -. -. - *.. Cl.. 1755 1750 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

REACTOR PROTECTIVE SYSTEM 10 Thermal Margin I Low Pressure 4.17.1.4 PA-0102CL CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 1750 1/23/91 1760.2 SETPOINT 1760 4/2/92 1761.0 1760.2 436 days DRIFT TOLERANCE 10 7/2/93 1752.8 1759.7 457 days PROJECTED 6/1/95 1761.0 700

  • days 1748.4 PA-0102CL 1770 1765 1760 tii CL.

1755 1750 _ )!( 1745 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PA-0102DL CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 1750 1/23/91 1761.2 SETPOINT 1760 4/2/92 1760.5 1760.5 436 days DRIFT TOLERANCE 10 7/2/93 1763.3 1761.5 457 days PROJECTED 6/1/95 1760.4 700 days 1765.8 PA-0102DL 1770 1765 1760 tii 1755 CL. x-. - -- -- -- +---->k 1750 1745 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

11 SURVEILLANCE REQUIREMENT 4.17.1 #5 Calibration of the High Pressurizer Pressure Reactor Trip Sensing Channels Four channels of High Pressurizer Pressure Reactor Trip are required to be operable when there is fuel in the reactor, more than one control rod is capable of being withdrawn, and the PCS is less than refueling boron concentration by LCO 3.17.1. Each channel is actuated by a current switch in the Reactor Protective System cabinets. The required setting is specified in Technical Specification Table 2.3.1. High Pressurizer Pressure Trip Inputs PA-0102AH, 0102BH, 0102CH, and 0102DH are electronic bistable switches located within the Reactor Protective cabinets in the control room. These switches receive their signals from Rosemount Model 1154 pressure transmitters located within the containment air room. The values plotted are the calibrated test pressure applied to the transmitter which caused the switch to actuate. All projected values fell within drift tolerance. The RPS electronic bistable switches are calibrated under a Technical Specification test each month.

PA-0102AH TS SETTING SETPOINT DRIFT TOLERANCE ci:: 2260 2250 (ii 2240 D.. 2230 2220 6/27/90 PA-0102BH TS SETTING SETPOINT DRIFT TOLERANCE 2260 2250 ci:: (ii 2240 D.. 2230 2220 6/27/90 REACTOR PROTECTIVE SYSTEM 12 High Pressurizer Pressure 4.17.1.5 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL 2255 1/23/91 2235.4 2235 4/2/92 2231.2 2233.8 436 days 10 7/2/93 2233.0 2233.0 457 days PROJECTED 6/1/95 2226.3 700 days 2231.8 PA-0102AH X*-*-*-*-*-*-*-*-*-*-*-*---.}<: **********************. -

    • )!:'.
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- - - - - - - - - - - - - ' - - - - - - - - - - - - - - - - - - - - - - *._ - - - - - - - - - - - -.::K 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL 2255 1/23/91 2233.0 2235 4/2/92 2235.7 2235.1 436 days 10 7/2/93 2235.3 2235.0 457 days PROJECTED 6/1/95 2239.3 700 days 2235.3 PA-0102BH X* -*-* -*-* -----*-. ---*-*-*-*+

                  • mm***********************)!:'.

1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

PA-0102CH TS SETTING SETPOINT DRIFT TOLERANCE 2260 2250 cc en 2240 Cl. 2230 2220 6/27/90 PA-0102DH TS SETTING SETPOINT DRIFT TOLERANCE 2260 2250 cc en 2240 Cl. 2230 2220 6/27/90 RACTOR PROTECTIVE SYSTEM High Pressurizer Pressure 4.17.1.5 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL 2255 1/23/91 2233.0 2235 4/2/92 2238.9 2233.0 436 days 10 ' 7/2/93 2228.2 2234.8 457 days PROJECTED 6/1/95 2244.3 700 days 2227.5 PA-0102CH

    • -*--***"************************************---~

x*******-*****-*************-~--... )!( ... **--* **--*--------1..

  • - ** - ********* - * - ***** - - **** ~- * - - - - * - ** - - - - * - - - ** _)!(

1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL 2255 1/23/91 2235.8 2235 4/2/92 2234.9 2234.9 436 days 10 7/2/93 2238.0 2235.6 457 days PROJECTED 6/1/95 2234.2 700 days 2240.3 PA*D102DH X**..... -*.. -* **-***-***-***+****......

                              • i

)!( )!( 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 13

14 SURVEILLANCt REQUIREMENT 4.17.1 #6 Calibration of the Low PCS Flow Reactor Trip Flow Channels Four channels of Low PCS Flow Trip are required to be operable when there is fuel in the reactor, more than one control rod is capable of being withdrawn, and the PCS is less than refueling boron concentration by LCO 3.17.1. The Primary Coolant Flow signal is derived from four differential pressure transmitters, each monitoring the differential pressure from a hot leg to a cold leg across the steam generator. The current output from these transmitters is algebraically summed across a resistor. The resulting voltage across this resistor is monitored by an electronic bistable located in the RPS cabinet. This circuit is repeated for each of the four RPS channels. The arrangement is illustrated in Figure 7-6 of the Palisades FSAR. The setting required by Technical Specifications {Table 2.3.1) is 95% of full flow. The center of the plotted tolerance band (0 milliamp error) indicates the signal for normal 100% flow; the plotted TS setting {bold dashed line) indicates the change in signal necessary to reach the trip point. The RPS electronic bistable switches are calibrated under a Technical Specification test each month. The transmitters are Rosemount Model 1152. The standard loop calibration is not applied to these devices, so it was necessary* to evaluate circuit performance on a component basis. When all four primary coolant pumps are operating the transmitter outputs are slightly above the trip range of 49.4% to 49.8% of span. The deviation from expected transmitter output was recorded and algebraically summed at the 50% calibration point. This would be the signal error received by the RPS bistable. Negative errors are conservative since the bistable would receive a voltage lower than expected for a given differential pressure {and corresponding flow). The only data exceeding the expected band {FA-0102A) was in the negative direction which is conservative. If the projected error did develop, the resultant flow signal would be less than the actual flow, and would therefore still initiate a trip on that channel before the stipulated flow setpoint is reached. The projected drift is not sufficient to cause a triµ on that channel with normal four pump PCS flow. The PCS flow signals are not used for any other functions.

FA-0102A TS SETTING SETPOINT DRIFT TOLERANCE INPUT ERROR@ 50% 0 -1 -2 MA '.3 -2.5 0.64 REACTOR PROTECTIVE SYSTEM Low PCS Flow 4.17.1.6 CALIBRATION DATE AS FOUND AS LEFT 10/18/90 0.04 4/2/92 -0.58 0.09 7/8/93 -0.09 0.04 PROJECTED 6/1/95 -0.77 -0.23 FA-0102A INTERVAL 532 463 days. days 694 days X- * - + )j( )I( - ---... -... : :-: ~......... ----. -.... -... -... ---. -.. ~ -3+------------------l---i---------------.----------11--<----- 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 FA-01028 TS SETTING SETPOINT DRIFT TOLERANCE INPUT ERROR @ 50% 0 ~ -1 -2 CALIBRATION MA DATE AS FOUND AS LEFT -3 10/18/90 0.05 -2.5 4/2/92 -0.25 0.01 0.64 7/8/93 0.02 0.06 PROJECTED 6/1/95 -0.33 0.07 FA-01028 x-. - -- -- -- *;<_-t------.)1( INTERVAL 532 463 694 days days days )I( )I( -3+------~--------._,-------~-----~--f-il----------- 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 15

FA-0102C TS SETTING SETPOINT DRIFT TOLERANCE INPUT ERROR @ 50% 0 ~ -1 -2 REACTOR PROTECTIVE SYSTEM Low PCS Flow 4.17.1.6 CALIBRATION MA DATE AS FOUND AS LEFT INTERVAL .3 10/18/90 0.01 -2.5 4/2/92 -0.36 0.06 532 days 0.64 7/8/93 -0.15 0.03 463 days PROJECTED 6/1/95 -0.45 694 days -0.28 FA-0102C x-. - + ".!(

x "j>

)!( .3+--~--------------1---1-------------------;-11--.-.----- 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 FA-0102D CALIBRATION MA DATE AS FOUND AS LEFT INTERVAL TS SETTING -3 10/18/90 0.06 SETPOINT -2.5 4/2/92 -0.38 -0.07 532 days DRIFT TOLERANCE 0.64 7/8/93 0.21 0.00 463 days PROJECTED 6/1/95 -0.57 694 days 0.42 INPUT ERROR@ 50% FA-01020

          • - - *********** - - - - - * - ~- ** - - - - - - - - * - *** - - - - - -)!(

x-. - -- . -.. -. --.-. -.: : --= :>s.. -.. --.. ---.... ------ ---......... -.;:!( 0 ~ -1 -2 .3-1---~------------o--i------_,_--~-----,__.----------- 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 16

17 SURVEILLANCE REQUIREMENTS 4.17.1 #8 & 9 Calibration of the Low SG Level Reactor Trip Level Sensing Channels Four channels of Low SG Level Trip for each steam generator are required to be operable when there is fuel in the reactor, more than one control rod is capable of being withdrawn, and the PCS is less than refueling boron concentration by LCD 3.17.1. LA-0751A, 07518, 0751C, and 07510 (for steam generator A) and LA-0752A, 07528, 0752C, and 07520 (for steam generator 8) are electronic bistable switches located in the Reactor Protective System (RPS) cabinets. These switches receive their input from Rosemount 1153 differential pressure transmitters located in the containment air room. These same transmitters supply the input signal for Auxiliary Feedwater actuation, TS 4.17.2 #3. The values plotted are the calibrated test differential pressure applied to the transmitter which caused the switch to actuate. One of the projected points for LA-0751A exceeds the TS limit; four other projected values exceed their normal tolerance. One of the two projections for the input to steam generator level instrument LA-0751A predicts drift beyond the TS limit; the other projection predicts drift in the other direction (the average of these two projections is within tolerance). One projection for each of three other level instruments is beyond the normal tolerance, but all of these points are in the conservative direction. Drift in the conservative direction does not conflict with TS requirements, and would initiate a trip at a SG level above the required trip level. None of the projected data approach the normal operating band. In order to determine if excessive transmitter drift is occurring for LA-0751A during the current operating cycle, measurements were performed on 3/17/95 with the Plant operating to compare the outputs of the redundant transmitters (ie all four level transmitters on SG A). The input voltages to the bistable trip units were measured. These are the signals which the bistable compares to its setpoint. The measurements of transmitters LA-07518, C, and D were averaged and compared to LA-0751A input voltage. The results show that LA-0751A transmitter is are very close to the average of the others and is not drifting out of the group as would be anticipated by the projected drift values. The average input voltage for LA-07518, C, and D was 3.581 Vdc; LA-0751A input measured 3.560 Vdc. Given a 1 to 5 Vdc span, the drift from the average of LA-0751A is -0.52%. It can be concluded that, despite the projections, excessive drift of the input to LA-0751A is not occurring during this operating cycle. The requested change to the TS only extends the SG level surveillance interval by 7 days. The RPS bistables are checked (and adjusted if necessary) monthly, thus eliminating them as a source of error, leaving the transmitter (addressed above) as the remaining source of drift. (No extension has been requested for the monthly RPS channel functional testing.)

LA-0751A TS SETTING SETPOINT DRIFT TOLERANCE 32 30 % LEVEL 25.90 26.90 1.00 REACTOR PROTECTIVE SYSTEM Low "A" SG level 4.17.1.8 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 27.06 4/8/92 28.58 27.32 7/12/93 26.08 27.17 PROJECTED 6/1/95 29.66 25.31 LA-0751A INTERVAL 421 days 461 days 689 days w w 28 X----- +--__ )K 26 -- - --- --- -- ------t-- ----- --- -* )K 24+--~~r--~~~~-+-~~-+-~~~~~~~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LA-07518 CALIBRATION. % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 27.13 SETPOINT 26.90 4/8/92 26.56 27.15 421 days DRIFT TOLERANCE 1.00 7/12/93 27.40 27.40 461 days PROJECTED 6/1/95 26.46 689 days 27.77 LA-07518 32 30 w w 28 - - - - - - - -. - - - - - - - - - - - - - - -. - - - - - - - - - - - - - - - - - - - - - - -. - - - - - - - ~ ~ 26 ______.:.;;;;;,.;;_-~---------*---------..! 24+--~~~~~~~~r--~~~~--+~~--+~~-+-~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 18

LA-0751C TS SETTING SETPOINT DRIFT TOLERANCE 32 % LEVEL 25.90 26.90 1.00 REACTOR PROTECTIVE SYSTEM Low "A" SG Level 4.17.1.8 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 26.39 4/8/92 27.65 27.15 7/12/93 27.49 27.07 PROJECTED 6/1/95 29.14 27.58 LA-0751C INTERVAL 421 461 days days 689 days 30 w ~ ~ 28 -~ ~ ~- _- :_---_: -_ -~ : :')( - - - - - - - - - : - - - - -5k - - - - - - - - - - - - - - - - - - - - - - -;Jc 26 ~ 24+--~~r---~~~~~~~~~~~~~--+-~~--+-~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LA-07510 TS SETTING SETPOINT DRIFT TOLERANCE 32 30 w % LEVEL 25.90 26.90 1.00 CALIBRATION DATE AS FOUND AS LEFT INTERVAL 2/14/91 27.13 4/8/92 26.56 27.15 421 days 7/12/93 27.40 27.40 461 days PROJECTED 6/1/95 26.46 689 days 27.77 LA-07510 w 28 - - - - - - - - - - - -. - - -. - - -. - - -. - - -. - - -. - - -. - - - - - - -. - - - - - - - - - -. ~ x- -- -

K

~

~

K 26----------------*-------*----

24+--~~r---~~~~~~~--+~~~~~~~~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 19

LA*0752A TS SETTING SETPOINT DRIFT TOLERANCE 32 30 w % LEVEL 25.90 26.90 1.00 REACTOR PROTECTIVE SYSTEM Low "B" SG Level 4.17.1.9 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 26.98 4/8/92 27.21 27.21 7/12/93 26.76 26.98 PROJECTED 6/1/95 27.35 26.32 LA-0752A INTERVAL 421 461 days days 689 days ii:; 28 ~ x---------- ~ )K 26,__ _ --- --- -- --- -- - --- --- -- --- -* 24+--~~,__~~~~----+-~~--+-~~~~~--+-~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LA-07528 CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 27.35 SETPOINT 26.90 4/8/92 28.39 27.20 421 days DRIFT TOLERANCE 1.00. 7/12/93 26.98 26.98 461 days PROJECTED 6/1/95 28.68 689 days 26.66 LA-07528 32 30 w ~ 28 x_:.; ::----_,,_------.:-:: ::0. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ::i< ~ )!( )!( 26 - 24+--~~~~~,__~~~~~~~~~~---+-~~----+-~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 20

LA-0752C TS SETTING SETPOINT DRIFT TOLERANCE 32 30 w % LEVEL 25.90 26.90 1.00 REACTOR PROTECTIVE SYSTEM Low "8" SG Level 4.17.1.9 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 26.83 4/8/92 27.69 27.24 7/12/93 26.98 26.98 PROJECTED 6/1/95 28.38 26.60 LA-0752C INTERVAL 421 days 461 days 689 days ~ 28 ~~: :__* _- _-_-_-_:_ -_ -_:: ~y - - - - - - - - * :~;- - **** - - ****** - - - - - - * - _)j( 26 ~ --- --- -~ 24+--~~~~---+~~-+-~~~~~-+-~~--+-~~__,__~~ 1/13/91 8/1/91 2/17/92 9/4192 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LA-0752D CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 27.28 SETPOINT 26.90 4/8/92 27.53 27.23 421 days DRIFT TOLERANCE 1.00 7/12/93 27.28 27.28 461 days PROJECTED 6/1/95 27.69 689 days 27.35 LA-07520 32 30 w w 28 x ~ : :._-: ::_. _.-=----..:.. : *-+.. -.... -. ---... "i... --. -.... ----. -- -... - ~ ~ 26 ~. -- * -- -- * -- -- --- --- -- * -- -- 24+--~~~~~~~~~~~~~~~~-+-~~-+-~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 21

SURVEILLANCE REQUIREMENTS 4.17.1 #10 & 11 Calibration of the Low SG Pressure Reactor Trip Pressure Sensing Channels Four channels of Low SG Pressure Trip for each steam generator are required to be operable when there is fuel in the reactor, more than one control rod is capable of being withdrawn, and the PCS is less than refueling boron concentration by LCO 3.17.1. 22 PA-0751A through PA-07510 and PA-0752A through PA-07520 are electronic bistable switches located within the Reactor Protective cabinets in the control room. These switches receive their signals from Rosemount Model 1154 pressure transmitters located within the containment air room. The values plotted are the calibrated test pressure applied to the transmitter which caused the switch to actuate. All projected values fell within drift tolerance. The RPS electronic bistable switches are calibrated under a Technical Specification test each month. The procedure for calibration of the SG pressure circuits was rewritten for the 4/4/92 performance to calibrate the instrumentation in an end-to-end loop fashion. Previously, this test calibrated the instruments individually to a calibration sheet. Do to this fact, it is not practical to compare the 1993 and 1992 performances to the 1991 performance. Therefore the graphs for PA-0751A through D and PA-0752A through D only display the 92 to 93 extrapolation. A review of the 1991 data showed that the transmitter drift (PT-0751A through D, and PT-0752A through D) for these instruments was within their 1% as-found acceptance criteria.

PA-0751A PSIA TS SETTING 500 SET POINT 512 DRIFT TOLERANCE 12 REACTOR PROTECTIVE SYSTEM Low "A" SG Pressure 4.17.1.10 CALIBRATION DATE AS FOUND AS LEFT 4/4/92 513.0 7/8/93 512.7 512.7 PROJECTED 6/1/95 512.2 PA-0751A INTERVAL 461 days 694 days 525 ** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 v.; a.. 510 505 500+--_______,___, _____________________________________________,__.. __ ____, 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PA-0751 B CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 511.8 DRIFT TOLERANCE 12 7/8/93 511.3 515.5 461 days PROJECTED 6/1/95 514.7 694 days PA-07518 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 v.; a.. 510 505 )I( -t-~~~~~~~~*+ 500+--------->---0--------------------_____,--...,_ __________ l--I ____ __ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 23

REACTOR PROTECTIVE SYSTEM Low "A" SG Pressure 4.17.1.10 PA-0751C CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 513.2 DRIFT TOLERANCE 12 7/8/93 512.0 512.3 461 days PROJECTED 6/1/95 510.5 694 days PA-0761C 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 Cii Q. 510 505 500+--~----l--t--------~---~----------------------o--<----. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PA-07510 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 513.0 DRIFT TOLERANCE 12 7/8/93 511.9 511.6 461 days PROJECTED 6/1/95 509.9 694 days PA-07610 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 Cii +---~~~~~~- Q. 510 505 500---------~-------~-----~---------.------------------. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 24

PA-0752A PSIA TS SETTING 500 SETPOINT 512 DRIFT TOLERANCE 12 REACTOR PROTECTIVE SYSTEM Low "B'; SG Pressure 4.17.1.11 CALIBRATION DATE AS FOUND AS LEFT 4/4/92 513.0 7/8/93 512.1 516.0 PROJECTED 6/1/95 514.6 PA-0752A INTERVAL 461 days 694 days 525 *****.*.......****.....*********.......**********....... 520 cc 515 Cii Cl.. 510 505 ~ -r-~~~~~~~-+ 500+---------1---<---------------------,,__----------------------. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PA-0752B CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 513.7 DRIFT TOLERANCE 12 7/8/93 515.4 515.7 461 days PROJECTED 6/1/95 518.3 694 days PA-07528 525......................................................... 520 cc 515 Cii Cl.. 510 505 500---------._. ______________________ _... _________ t--l ____ _., 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 25

REACTOR PROTECTIVE SYSTEM 26 Low "B" SG Pressure 4.17.1.11 PA-0752C CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING . 500 SETPOINT 512 4/4/92 514.7 DRIFT TOLERANCE 12 7/8/93* 511.0 513.0 461 days PROJECTED 6/1/95 507.4 694 days PA-D752C 525 **** - - - - - - - - - - *..* - - - - - -.***** - - - - - - - - - *..**.**** -. - - - - - 520 ~ 515 ,.i _______ _ CL. 510 505 500+---------1--1--------------_...,-----------~----........ -----. 2/17/92 ~/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PA-0752D CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 512.6 DRIFT TOLERANCE 12 7/8/93 516.1 516.1 461 days PROJECTED 6/1/95 521.4 694 days PA-07520 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 -~------~ Cii -r----- CL. 510 505 500+----------~-------------------------------------------. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

SURVEILLANCE REQUIREMENTS 4.17.2 #ld Calibration of the Pressurizer Pressure Channels for Safety Injection Four channels of Pressurizer Pressure instrumentation for Safety Injection are required to be operable when PCS temperature is above 300°F, by LCO 3.17.2. Safety Injection is actuated by low pressurizer pressure on a 2-out-of-4 logic. 27 PIA-0102ALL, 0102BLL, 0102CLL, and 0102DLL are main control board mounted indicators with an integral actuating relay which feeds the 2-out-of-4 logic. These devices are in the same instrument loop as the RPS high pressure and TM/LP trip bistables. These loops are supplied by Rosemount 1154 pressure transmitters located in the containment air room. The values plotted are the calibrated test pressure applied to the transmitter which caused the switch to actuate. All projected values fell within drift tolerance.

PA-0102ALL TS SETTING SETPOINT DRIFT TOLERANCE 1615 1610 cc 1605 V,j Cl.. 1600 1595 1590 6/27/90 PA-0102BLL TS SETTING SETPOINT DRIFT TOLERANCE 1615 1610 cc 1605 V,j Cl.. 1600 1595 1590 6/27/90 PSIA 1593 1605 10 x~ -- ENGINEERED SAFETY FEATURES Pressurizer Pressure 4.17.2.1.d CALIBRATION DATE AS FOUND AS LEFT 1/23/91 1604.6 4/2/92 1601.4 1607.3 7/2/93 1605.5 1605.5 PROJECTED 6/1/95 1600.4 1602.7 PA-0102ALL

  • -----x INTERVAL 436 457 days days 700 days 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL 1593 1/23/91 1605.3 1605 4/2/92 1598.5 1607.1 436 days 10 7/2/93 1607.7 1606.4 457 days PROJECTED 6/1/95 1595.5 700 days 1607.3 PA-0102BLL

x

- - - - - - - - - - - - - - - - - *- - - - - - - - - - - - - - - - - - - - - - - - - - - " - - - - -.)K 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 28

PA-0102CLL TS SETTING SETPOINT DRIFT TOLERANCE 1615 1610 cc Ci.i 1605 c.. 1600 1595 1590 6/27/90 PA-0102DLL TS SETTING SETPOINT DRIFT TOLERANCE 1615 1610 cc 1605 Ci.i c.. 1600 1595 1590 6/27/90 PSIA 1593 1605 10 ENGINEERED SAFETY FEATURES Pressurizer Pressure 4.17.2.1.d CALIBRATION DATE AS FOUND AS LEFT 1/23/91 1604.6 4/2/92 1606.1 1604.6 7/2/93 1599.8 1606.5 PROJECTED 6/1/95 1608.9 1599.2 PA-0102CLL INTERVAL 436 457 days days 700 days 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL 1593 1/23/91 1604.8 1605 4/2/92 1603.5 1603.5 436 days 10 7/2/93 1608.0 1605.4 457 days PROJECTED 6/1/95 1603.3 700 days 1612.3 PA-0102DLL 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 29

SURVEILLANCE REQUIREMENTS 4.17.2 #2b & c Functional Testing and Calibration of the SIRWT Level Switches and RAS Logic Four channels of SIRWT Level Switches and two channels of RAS initiation logic are required to be operable when PCS temperature is above 300°F, by LCO 3.17.2. Safety Injection Refueling Water Tank Level Switches 30 No drift data is presented for these detectors. Their setpoint is determined by the length of the supporting cable, and is not subject to drift. Each of the four detectors actuates one output relay in each logic train. The output relays de-energize when the conductivity probe is uncovered by decreasing tank water level. Technical Specifications require a Channel Calibration to assure that each detector functions properly, and a Channel Functional Test of each of the two trains of logic circuitry. The logic circuits are comprised of electro-mechanical relays, as illustrated in Logic Drawing E-17, sheet 5 (Figure 7-30 of the Palisades FSAR). SIRWT level detectors are accessible for calibration, but channel functional testing cannot be done on when the plant is operating since it would initiate an actual Recirculation Actuation Signal. Calibration verification and channel functional testing are performed together as a coordinated test. An analog indication of SIRWT water level from a separate instrument is displayed in the control room. Manual action provides an alternate means of recirculation initiation. NO DATA IS PROVIDED - INSTRUMENTS NOT SUBJECT TO DRIFT

31 SURVEILLANCE REQUIREMENTS 4.17.2 #3c & d Calibration of the Low SG Level for Auxiliary Feedwater Actuation Four channels of Low SG Level for each steam generator are required to be operable for initiation of Auxiliary Feedwater when the PCS temperature is above 300°F by LCO 3.17.2. LS-0751A, 07518, 0751C, and 07510 (for steam generator A) and LS-0752A, 07528, 0752C, and 07520 (for steam generator B) are electronic bistable switches located in the Auxiliary Feedwater Actuation System (AFAS) cabinets. These switches receive their input from Rosemount 1153 differential pressure transmitters located in the containment air room. These same transmitters supply the input signal for Low Steam Generator Level Reactor Trip, TS 4.17.1 #8 & 9. The values plotted are the calibrated test differential pressure applied to the transmitter which caused the switch to actuate. One of the projected points for LS-0752A exceeds the TS limit; four other projected values, two for LS-0751A and one each for LS-07528 and LS-0752C, exceed their normal tolerance. One of the two projections for the input to steam generator level instrument. LS-0751A predicts drift beyond the normal tolerance band in the non-conservative direction; the other projection predicts drift beyond the band in the other direction (the average of these two projections is within tolerance). A similai pair of projections in different directions occurs for reactor trip input LA-0751A, which uses the same transmitter. Measurements discussed in that section (TS 4.17.1 #8, Page 9) determine that excessive drift in this transmitter signal does not.appear to be occurring during this operating cycle. One of the two projections for the input to LS-0752A projects it to drift below the TS limit, but only because an actual component failure, a faulty power supply, occurred within the historical data period being examined; that projection, therefore, is considered. invalid. The other projection for LS-0752A predicts very little drift. Therefore, the drift for LS-0752A over the current cycle is expected to be acceptable. One projection for LS-07528 is beyond the normal tolerance, but in the conservative direction. Drift in the conservative direction does not conflict with TS requirements, and would initiate auxiliary feedwater at a SG level above the required level. The projected data point does not approach the normal operating band. One projection for LS-0752C is slightly beyond the normal tolerance in the non-conservative direction. This slight deviation from the normal tolerance is of no safety significance. The one projection is only 0.2% of span (an actual water level change of approximately ~") outside the normal tolerance and the average of the two projections (29.57%) is within the 29.91+/-1% tolerance band. Both projected points (30.43% and 28.71%) are well above the required TS setting of 25.9%. The requested TS change extends the SG level surveillance interval by only 7 days. The Technical Specifications allow continued operation with an inoperable SG level channel for that same period (see TS Action Statement 3.17.2.2).

ENGINEERED SAFETY FEATURES 32 AFAS "A" SG Level 4.17.2.3.c LS-0751A CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 30.02 SETPOINT 29.91 4/8/92 31.28 30.16 421 days DRIFT TOLERANCE 1.00 7/12/93 28.91 30.02 461 days PROJECTED 6/1/95 32.09 689 days 28.16 LS-0751A 32 )K uj 30 ~~ ~ ~~ -~~~-~~~~ ~ :~i ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~: i:i:; 28 )K ~ 26-24+--~~+--~~~~-+-~~-+-~~~~~~~~--+-~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LS-0751B CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 29.95 SETPOINT 29.91 4/8/92 29.42 29.93 421 days DRIFT TOLERANCE 1.00 7112/93 30.16 30.16 461 days PROJECTED 6/1/95 29.30 689 days 30.51 LS-07518 32 30 ~~ ~ ~- _- ~ -_-:___-_ -~ ~ ~~ - * - - * - - -. - - - * - - "i ---. -------. -----------5k ~ .. - - - - - - - - - - -...... - - - - - -...... - - - - -............ -.......... - - -.. -.......... -.. - - - d'< i:i:; 28 ~ 26-24+--~~+--~~+--~---.~~~~~~~~-+-~~-+-~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

ENGINEERED SAFETY FEATURES 33 AFAS "A" SG Level 4.17.2.3.c LS-0751 C CALIBRATION % LEVEL DATE .AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 29.87 SETPOINT 29.91 4/8/92 30.13 29.93 421 days DRIFT TOLERANCE 1.00 7/12/93 30.29 29.66 461 days PROJECTED 6/1/95 30.08 689 days 30.19 LS-0751C 32 30 x----------*+------:t w ~ 28 26 -- 24+--~~r---~~~~~~~~~~-+-~~~~~-+-~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LS-0751 D CALIBRATION % LEVEL DATE AS FOUND AS LEFT* INTERVAL TS SETTING 25.90 2/14/91 29.95 SETPOINT 29.91 4/8/92 29.42 29.93 421 days DRIFT TOLERANCE 1.00 7/12/93 30.16 30.16 461 days PROJECTED 6/1/95 29.30 689. days 30.51 LS-07510 32 30 ~: ~ ~- _- ~ --* ~ *_ -~ -_ ~~.*** - - - -.*** - * -"i -....... -. -..... ---. -.. ~ ~

.... --.. ---........ ----. --... --- -........ --.. ---............. --.......... -.. -~

~. 28 26~ - 24+--~~~~~r---~~~~~~~~~~~~~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

LS-0752A ENGINEERED SAFETY FEATURES AFAS "8" SG Level 4.17.2.3.d CALIBRATION DATE AS FOUND AS LEFT INTERVAL TS SETTING SETPOINT % LEVEL 25.90 29.91 1.00 2/14/91 4/8/92 29.95 29.78 29.78 421 461 days days DRIFT TOLERANCE 7/12/93 24.91 30.21 PROJECTED 6/1/95 29.93 689 days 22.93 LS-0752A

32.

~ :: x: : :- -_ :----:-_- -~: :+ ~- ---" ----- -----------------" 26- '-......+ 24+-~~~~~~~~~~~~~~~~~~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LS-0752B CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 29.95 SETPDINT 29.91 4/8/92 31.28 30.11 421 days DRIFT TOLERANCE 1.00 7/12/93 29.95 29.95 461 days

  • PROJECTED 6/1/95 32.13 689 days 29.70 LS-07528 32
K

- - - - -: -=-----=---: ::-'>!-.. - - - - - - - - - ****** - - - - - - - - - **** - *** - - - - - - - - 30 x- -- +----* )I( )I( w i:i:; 28 ';ft 26-24+--~~~~~~~~~~~~~~~~~~~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 34

LS-0752C TS SETTING SET POINT DRIFT TOLERANCE 32 % LEVEL 25.90 29.91 1.00 ENGINEERED SAFETY FEATURES AFAS "B" SG Level 4.17.2.3.d CALIBRATION DATE AS FOUND AS LEFT 2/14/91 30.10 4/8/92 30.62 30.16 7/12/93 29.58 29.58 PROJECTED 6/1/95 30.43 28.71 LS-0752C INTERVAL 421 days 461 days 689 days 30 -x:: :_- _- :_-_-;:_ -_ *...:. -_ :~~- --------*;- ---------------------")i:: LLI - - ";K i:i:i 28 26~ - ---- - - - -. 24<---~--.r--~~~~-r-~~~~~~~~~~~~~~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LS-0752D CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING 25.90 2/14/91 30.10 SETPOINT 29.91 4/8/92 30.30 30.10 421 days DRIFT TOLERANCE 1.00 7/12/93 30.02 30.02 461 days LLI PROJECTED 6/1/95 30.36 689 days 29.91 LS-07520 32 30 x.:: :..: : _-__-_-..:.. *_ *...: -_ -_,-, -----... -. --. --*; -----.. -... ------------'* i'.ij 28 ~ 26-24<---~~r---~--.~~---,~~--r~~-r-~~-r-~~----+-~~_, 1/13/91 8/1/91. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 35

36 SURVEILLANCE REQUIREMENTS 4.17.3 #2c Calibration of the Containment High Radiation Monitors for Containment Isolation Four channels of Containment Area Radiation Monitors are required to be operable for initiation of Containment Isolation when the PCS temperature is above Cold Shutdown by LCO 3.17.3. Each of the four radiation monitors de-energizes an output relay when its setpoint is reached. Each output relay has contacts in each of the 2-out-of-4 Containment High Radiation logic trains. Each logic train is capable of initiating Containment Isolation. These circuits are illustrated in Logic Drawing E-17, sheet 7. Radiation monitors RIA 1805, 1806, 1807, and 1808 are General Atomic instruments using ion chamber detectors. The detectors for these RIAs are located in inaccessible areas of the containment building. They are used to monitor radiation levels in the containment as a secondary means of initiating containment isolation. The primary means of initiating isolation senses containment pressure. A surveillance interval extension request in not being requested for those pressure devices. The plotted data are the trip settings determined from calibration of the sensor and associated radiation monitor. The projected data, based on observed drift during the two previous calibration intervals, shows that the trip setpoint is expected to remain in tolerance for the remainder of this fuel cycle.

RIA -1805 TS SETTING SETPOINT DRIFT TOLERANCE 20 15 ~ 10 5 ISOLATION FUNCTION Containment Area Rad Monitors 4.17.3.2.c CALIBRATION R/Hr DATE AS FOUND AS LEFT INTERVAL 20 12/9/90 6.0 7 2/24/92 6.0 6.0 442 days 2 6/8/93 7.0 7.0 471 days PROJECTED 6/1/95 7.0 724 days 8.5 RIA-1805

~-:-: ~:-: ~:.: ~ :. :~ : : : : : : : : : : : : : : :

~: : : : : : : : : : : : : : : : : : : : :

~

O+--~--+-~~--+-~---r~~~~--.~~~~~+--~~~~ 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 RIA -1806 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 20 12/9/90 7.0 SETPOINT 7 2/24/92 6.0 6.0 442 days DRIFT TOLERANCE 2 6/8/93 7.0 7.0 471 days PROJECTED 6/1/95 5.4 724 days 8.5 RIA -1806. 20 15 cc - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "::1( x- - - - - - - - - + -)!( - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -::K c;; 10 CL. 5 O+---~--+-~~~~~~~~~~~~--+-~~~~~+--~_, 6/27/90 1/13/91 8/1/91. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 37

RIA-1807 TS SETTING SETPOINT DRIFT TOLERANCE 20 15 10 5 ISOLATION FUNCTION Containment Area Rad Monitors 4.17.3.2.c CALIBRATION R/Hr DATE AS FOUND AS LEFT INTERVAL 20 12/9/90 6.0 7 2/24/92 6.0 6.5 442 days 2 6/8/93 7.0 7.0 471 days PROJECTED 6/1/95 7.0 724 days 7.8 RIA -1807 ~-:.: ~:-: ~:.: ~ :. :~ ~,: : : : : : : : : : : : : : ~: : : : : : : : : : : : : : : : : : : : : : ~ O+--~~~~--+-~~~~--+-~--.~~--r-~~~~~~_____, 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 RIA-1808 CALIBRATION R/Hr DATE AS FOUND AS LEFT INTERVAL TS SETTING 20 12/9/90 7.0 SETPOINT 7 2/24/92 6.0 6.0 442 days DRIFT TOLERANCE 2 6/8/93 7.0 7.0 471 days PROJECTED 6/1/95 5.4 724 days 8.5 RIA-1808 20 ---------- 15

z::

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6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 38

SURVEILLANCE REQUIREMENTS 4.17.3 #3c & d Calibration of the Low SG Pressure for Main Steam and Main Feedwater Isolation Four channels of Steam Generator Pressure Instrumentation for each steam generator are required to be operable for initiation of steam and feedwater isolation when the PCS temperature is above Cold Shutdown by LCO 3.17.3. 39 The bistable outputs from the four pressure channels on each steam generator are combined in 2-out-of-4 logic trains. The 2-out-of-4 low steam generator pressure signal on either steam generator initiates closure of both main steam isolation valves, and one of the main feedwater regulating valve and bypass valve for that steam generator. PIC-0751A through PIC-07510 and PIC-0752A through PIC-07520 are main control board mounted indicators with an integral actuating relay which feeds the 2-out-of-4 logic. These devices are in the same instrument loop as the RPS low steam generator pressure trip. These switches receive their signals from Rosemount Model 1154 pressure transmitters located within the containment air room. The values plotted are the calibrated test pressure applied to the transmitter which caused the integral relay to actuate. All projected values fell within drift tolerance. The procedure for calibration of the SG pressure circuits was rewritten for the 4/4/92 performance to calibrate the instrumentation in an end-to-end loop fashion. Previously, this test calibrated the instruments individually to a calibration sheet. Do to this fact, it is not practical to compare the 1993 and 1992 performances to the 1991 performance. Therefore the graphs for PIC-0751A through D and PIC-0752A through D only display the 92 to 93 extrapolation. A review of the 1991 data showed that the transmitter drift (PT-0751A through D, and PT-0752A through D) for these instruments was within their 1% as-found acceptance criteria.

ISOLATION FUNCTION "A" Steam Generator Pressure 4.17.3.3.c PIC-0751A CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 511.0 DRIFT TOLERANCE 12 7/8/93 511.2 511.2 461 days PROJECTED 6/1/95 511.5 694 days PIC-0751A 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 c:i:: 515 iii CL. 510 505 500+------------tl------------~----o-----;----------------,___.-------. 2/17/92 . 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PIC-07518 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 506.0 DRIFT TOLERANCE 12 7/8/93 505.2 511.2 461 days PROJECTED 6/1/95 510.0 694 days PIC-07518 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 c:i:: 515 en CL. 510 505 500+---------,__.------------~-------------.....,_-----------l---<------ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 40

ISOLATION FUNCTION 11A 11 Steam Generator Pressure 4.17.3.3.c PIC-0751C CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SET POINT 512 4/4/92 505.5 DRIFT TOLERANCE 12 7/8/93 505.5 509.0 461 days PROJECTED 6/1/95 509.0 694 days PIC-0761C 525 *********.***. - *****.*************** - **. - ************* -

  • 520 cc 515 iii CL 510 505 500+--------t--<--llil--__________ _,_ _______________________ _____,

2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PIC-07510 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 510.6 DRIFT TOLERANCE 12 7/8/93 510.8 510.7 . 461 days PROJECTED 6/1/95 511.0 694 days PIC-07610 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 iii CL 510 +-------- 505 500+----------t--l------------------------------------------------ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 41

ISOLATION FUNCTION "B" Steam Generator Pressure 4.17.3.3.d PIC*0752A CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 506.0 DRIFT TOLERANCE 12 7/8/93 506.8 511.0 461 days PROJECTED 6/1/95 512.2 694 days PIC-0752A 525.. - - - ** - * - - - * - - - - ****** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 en Cl. 510 505 )K -+-~--~*~~~~-+ 500----------,,____ ________________ _,.. ____________________._._. __ _____, 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PIC-0752B CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 509.1 DRIFT TOLERANCE 12 7/8/93 512.9 513.2 461 days PROJECTED 6/1/95 518.9 694 days PIC-07528 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 en Cl. 510 505 500+---------._. ______________________ ~ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 42

ISOLATION FUNCTION "B" Steam Generator Pressure 4.17.3.3.d PIC-0752C CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 509.2 DRIFT TOLERANCE 12 7/8/93 506.9 509.5 461 days PROJECTED 6/1/95 506.0 694 days PIC-0752C 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 V,j Cl.. 510 505 500+--~----l--l-------------------------------------o-----<----. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 PIC-0752D CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING 500 SETPOINT 512 4/4/92 506.1 DRIFT TOLERANCE 12 7/8/93 510.9 511.4 461 days PROJECTED 6/1/95 518.6 694 days PIC-07520 525 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 520 cc 515 V,j Cl.. 510 505

)j(

+-- 500+---------~------------------------..--------.._,-----. 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 43

SURVEILLANCE REQUIREMENTS 4.17.4 #5, 9, 11 & 12, 13 & 14 & 21 Calibration of Several Channels of Post Accident Monitoring Instrumentation Two channels each of Regulatory Guide 1.97 Type A and Category 1 instrument are required to be operable when the PCS is above 300°F by LCO 3.17.4. 44 This LCO requires operable indication only. Several instruments listed in this LCO are part of instrument loops used for other functions and required by other LCOs. Deferral of the 18 month calibration has been requested for the Subcooled Margin Monitor (SMM) channels, wide range pressurizer pressure channels, wide range steam generator level channels, narrow range steam generator pressure channels, and high range containment radiation monitors. SMM Computer Pressure Inputs I/I-0105A and I/I-01058 are current to current converters located in the SMM cabinet in the control room. They receive their signal from Rosemount 1154 transmitters located in the containment air room. The current to current converters are calibrated using the end-to-end calibration method, where a known pressure is applied to the pressure transmitter and the I/I current output to the SMM computer is monitored. The end-to-end loop tolerance stated for I/I-0105A and B is 30 psia. The I/I's provide the SMM computers with a reference PCS pressure which the SMM computers use internal steam tables to determine corresponding saturation temperature. The highest PCS temperature input is subtracted from the calculated saturation temperature. The resultant temperature can be displayed by the SMM computer as the subcooled margin. All projected values fell within the drift tolerance. SMM Computer Temperature Inputs I/l-Oll2CC through I/I-0122HD are current to current converters located in the the control room. They receive their signal from RIS Type SC-1373 temperature transmitters located in the control room. The current to current converters are calibrated using the end-to-end calibration method, where a known resistance/temperature is applied to the temperature transmitter and the remaining devices in the loop are monitored. The end-to-end loop tolerance stated for I/I-Oll2CC through 1/l-0122HD is 6.5 °F. The I/I's provide the SMM computers with reference PCS temperatures which the SMM computers use the highest temperature in each SMM channel to determine corresponding saturation pressure. The PCS pressure input is subtracted from the calculated saturation pressure. The resultant pressure can be displayed by the SMM computer. All projected values fell within the drift tolerance except for the projected 1991-1992 drift for I/I-Oll2CC. Its projected temperature was high at 700°F. The data point is outside of the plant operating range and the error is in the conservative direction. The SMM's do not provide a protective function or equipment actuation, they only provide indication. Testing of the SMM Computers The SMM computers are functionally tested every 18 months. The test is performed by simulating a pressure and temperature input to the SMM computers and recording the displayed SMM pressure and temperature. All projected values fell within the drift tolerance.

I/ l-0105A TS SETTING SETPOINT DRIFT TOLERANCE PSIA NONE N/A 30 ACCIDENT MONITORING Subcooled Margin Monitor, Pressure Input 4.17.4.5 CALIBRATION DATE AS FOUND AS LEFT 12/17/90 9.0 3/14/92 -2.3 -2.3 6/15/93 3.8 3.8 PROJECTED 6/1/95 -14.0 13.1 INTERVAL 454 days 458 days 717 days MAXIMUM INPUT ERROR I/ l-0105A 30 20 10 Ci.i 0 CL. -10 X- - ------ ---:1( --+ -20 -30 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 I/ l-0105B CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 12/17/90 -3.8 SETPOINT N/A 3/14/92 5.8 4.9 454 days DRIFT TOLERANCE 30 6/15/93 7.5 -7.5 458 days PROJECTED 6/1/95 7.6 717 days -3.4 MAXIMUM INPUT ERROR 40 20 Ci.i 0 CL. -20 -40 6/27/90 I/ 1-01058 -- -+------*+ ~

1(
1(

1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 45

I/ l-0112CC TS SETTING SETPOINT DRIFT TOLERANCE

  • F ACCIDENT MONITORING Subcooled Margin Monitor, Temperature input 4.17.4.5 CALIBRATION DATE AS FOUND AS LEFT NONE 12/17/90

-1.0 N/A 3/14/92 3.9 -0.5 6.5 6/15/93 0.5 0.5 PROJECTED 6/1/95 8.1 2.1 INTERVAL 454 days 458 days 717 days MAXIMUM INPUT ERROR 10 5 0 -5 -10 6/27/90 I/ l-0112HC TS SETTING SETPOINT DRIFT TOLERANCE I/ l-D112CC )'. x-. _.x +-----.)'. 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL NONE 12/17/90

-0.4 N/A 3/14/92 -1.1 -1.1 454 days 6.5 6/15/93 -1.3 -1.3 458 days PROJECTED 6/1/95 -2.3 717 days -1.6 MAXIMUM INPUT ERROR I/ l-D112HC 10 5 0 x----------+-~~~~~~ -5 -10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 46

I/ l-0112CD TS SETTING SETPOINT DRIFT TOLERANCE

  • F ACCIDENT MONITORING Subcooled Margin Monitor, Temperature input 4.17.4.5 CALIBRATION DATE AS FOUND AS LEFT NONE 12/17/90
  • 0.7 N/A 3/14/92 0.9 1.3 6.5 6/15/93 1.3 1.3 PROJECTED 6/1/95 3.7 1.3 INTERVAL 454 days 458 days 717 days MAXIMUM INPUT ERROR 1/1-0112CD 10 5

0 -5 -10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 I/ l-0112HD CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 12/17/90

-0.8 SETPOINT N/A 3/14/92 0.4 0.4 454 days DRIFT TOLERANCE 6.5 6/15/93 0.7 0.7 458 days PROJECTED 6/1/95 2.6 717 days 1.0 MAXIMUM INPUT ERROR 1 / l-0112HD 10 5 0 x-----------+--~~~~-~ -5 -10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 47

I/ l-0122CC TS SETTING SETPOINT DRIFT TOLERANCE ACCIDENT MONITORING Subcooled Margin Monitor, Temperature input 4.17.4.5 CALIBRATION

  • F DATE AS FOUND AS LEFT NONE 12/17/90 1.0 N/A 3/14/92 0.8 0.8 6.5 6/15/93 1.1 1.1 PROJECTED 6/1/95 0.8 1.7 INTERVAL 454 days 458 days 717 days MAXIMUM INPUT ERROR I/ l-0122CC 10 5

0 ><----------+~~~-~.~ -5 -10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 I/ l-0122HC CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 12/17/90 0.7 SETPOINT N/A 3/14/92 1.7 1.7 454 days DRIFT TOLERANCE 6.5 6/15/93 2.0 2.0 458 days PROJECTED 6/1/95 3.6 717 days 2.3 MAXIMUM INPUT ERROR I/ l-0122HC 10 5

0 x- -- -- -- -- - +-------~ -5

  • 10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 48

I I l-0122CD TS SETTING SETPOINT DRIFT TOLERANCE ACCIDENT MONITORING Subcooled Margin Monitor, Temperature input 4.17.4.5 CALIBRATION

  • F DATE AS FOUND AS LEFT NONE 12/17/90 0.3 N/A 3/14/92 0.3 0.3 6.5 6/15/93 1.0 1.0 PROJECTED 6/1/95 0.9 2.0 INTERVAL 454 days 458 days 717 days MAXIMUM INPUT ERROR I/ l-0122CD 10 5

0 x----------+*~~~~~.~ -5 -10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 I I l-0122HD CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 12/17/90 0.3 SETPOINT N/A 3/14/92 0.3 0.3 454 days DRIFT TOLERANCE 6.5 6/15/93 0.3 0.3 458 days PROJECTED 6/1/95 0.3 717 days 0.4 MAXIMUM INPUT ERROR I/ l-0122HD 10 5

0 x- -- -- -- -- - -+------~ -5 -10 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 49

50 Calibration of the Wide Range Pressurizer Pressure Indicator (TS 4.17.4 #9) PI-0105A and Pl-01058 are analog pressure indicators located in the EC-12 panel in the control room. They receive their signal from Rosemount 1154 transmitters located in the containment air room. The pressure indicators are calibrated using the end-to-end calibration method, where a known pressure is applied to the pressure transmitter and the remaining devices in the loop are monitored. The end-to-end loop tolerance stated for PI-0105A and 8 is 50 psia. All projected values fell within the drift tolerance except for the projected 1991-1992 drift for PI-01058. The actual pressure indication for PI-01058 was checked on 3/17/95 and compared with the four narrow range pressurizer pressure indicators. The results were as follows: Pl-01058 PIA-Ol02ALL PIA-0102BLL PIA-Ol02CLL PIA-0102DLL 2060 psia 2060 psia 2060 psia 2060 psia 2060 psia Because PI-01058 is required only for indication, and its indicated value is indistinguishable from that of the more precise narrow range indicators, the above comparison shows that there has not been any significant drift in the 8" wide range pressurizer pressure indication since the last calibration.

ACCIDENT MONITORING 51 Wide Range Pressurizer Pressure 4.17.4.9 Pl -0105A CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 12/17/90 10 SETPOINT N/A 3/14/92 10 10 454 days DRIFT TOLERANCE 50 6/15/93 25 25 458 days PROJECTED 6/1/95 25 717 days 48 Pl -0105A 75

        • - - - - * - - *********** - * - * - * - * - ** - ***************** *::!(

c:c 25 V,i )!( x-. -. -. - -- -+- c.. -25 .75 6/27/90 1/13/91 8/1/91 2117/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 Pl-0105B CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 12/17/90 -10.0 SETPOINT N/A 3/14/92

  • 40.0
  • 10.0 454 days DRIFT TOLERANCE 50 6/15/93
  • 25.0
  • 25.0 458 days PROJECTED 6/1/95
  • 72.3 717 days
  • 48.5 Pl -01058 75 c:c 25 V,i c..
  • 25 x~. - -

-)I< .. __ *X

          • - ************* - - - ************ - * - ** - - *********** -::K

.75 +--~~~~~~___,~~~~~~~--+-~~~~~,__~)I< 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95

52 Calibration of Wide Range Steam Generator Level Indicators (TS 4.17.4 #11 & 12) Redundant indication of wide range steam generator level is provided in the control room. Rosemount level transmitters LT-0757A and LT-07578 provide indication for steam generator A while LT-0758A and LT-07588 provide indication for steam generator level 8. Indication is also provided by LT-0757A and LT-0758A outside the control room at the auxiliary shutdown panel for use in the unlikely event that a fire would render the control room uninhabitable. Evaluation of past calibration data indicates that these level transmitters are not expected to drift out of tolerance during the extended calibration interval.

LT -0757A TS SETTING SETPOINT DRIFT TOLERANCE % LEVEL NONE N/A 10 MAXIMUM INDICATION ERROR 15 ACCIDENT MONITORING Wide Range SG Level 4.17.4.11 12 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 -0.25 4/8/92 -0.44 -0.44 7/12/93 -0.19 -0.19 PROJECTED 6/1/95 -0.49 0.19 LT -0757A INTERVAL 421 461 days days 689 days 10 ********..........* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -. w w 5 0 x- - - - - - - - - --+------->K '<[<. -5 -10 -15 +----+---~----+------+---~--~--~-~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LT -0758A CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 2/14/91 0.19 SET POINT N/A 4/8/92 0.19 -0.19 421 days DRIFT TOLERANCE 10 7112/93 -0.19 -0.25 461 days PROJECTED 6/1/95 -0.25 689 days -0.25 MAXIMUM INDICATION ERROR LT-0758A 15 10 5 w 0 w x- -- - - -- -- --*+*------*>K '<[<. -5 -10 -15 +----~--+------~----+-----+-----+---~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 53

LT -07578 TS SETTING SETPOINT DRIFT TOLERANCE % LEVEL NONE N/A 10 MAXIMUM INDICATION ERROR 15 ACCIDENT MONITORING Wide Range SG Level 4.17.4. 11. 12 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 0.01 4/8/92 -0.03 -0.25 7/12/93 -0.19 -0.19 PROJECTED 6/1/95 -0.25 -0.09 LT-07578 INTERVAL 421 days 461 days 689 days 10 w w ';le. 5 0 x- - - - - - - - - - --1-* ------)K -5 -10 -15 +----------~--~-----~---+----~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LT -07588 CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 2/14/91 0.19 SET POINT N/A 4/8/92 -0.19 -0.19 421 days DRIFT TOLERANCE 10 7112/93 -0.25 -0.25 461 days PROJECTED 6/1/95 -0.86 689 days -0.34 MAXIMUM INDICATION ERROR LT -07588 15 10 w w 5 0 x- -- - - -- - - - -+-------~ ';le. -5 -10 -15 +-----+-----+----~---------+--~--____, 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 54

55 Calibration of Steam Generator Pressure Indicator (TS 4.17.4 #13 & 14) Four indications are provided in the control room to indicate pressure in each of the two steam generators. Rosemount pressure transmitters PT-0751A, 07518, 0751C, and 0751D provide indication of steam generator A pressure; PT-0752A, 07528, 0752C, and 0752D provide indication of steam generator 8 pressure. These transmitters also provide input to the RPS for the low steam generator pressure trip function and provide the input for steam and feedwater isolation. The data provided for the RPS low steam generator trip setpoints (Technical Specification 4.17.1.10 and 4.17.1.11) is a compilation of drift associated with these transmitters and the RPS bistable. Refer to the RPS low steam generator level trip setpoints for a further discussion. SEE DATA PRESENTED FOR TS 4.17.1 #10 & 11

56 High Range Containment Area Radiation Monitors {TS 4.17.4 #21) Radiation monitors RIA 2321 and 2322 are Victoreen instruments using ion chamber detectors. The detectors for these RIAs are located in the containment building, just above the steam generators, an inaccessible area during operation. They are used to monitor post accident radiation levels, and provide no automatic function. The instruments are calibrated at one point using a nominal 10 R/hr gamma source. The other calibration points are electronically compared to that point. The plotted data are the as-found and as-left readings taken when the calibration source is applied. The decreasing tolerance band corresponds to the decreasing source strength. The projected data, based on observed drift during the two previous calibration intervals, shows that the trip setpoint is expected to remain in tolerance for the remainder of this fuel cycle.

RIA -2312 TS SETTING SETPOINT DRIFT TOLERANCE 12 11 10

c 9

ii: 8 7 6 6/27/90 RIA-2322 TS SETTING SETPOINT DRIFT TOLERANCE 12 11 10 R/Hr N/A NONE 1.6 ACCIDENT MONITORING High Range Cont Radiation 4.17.4.21 CALIBRATION DATE AS FOUND AS LEFT 10/19/90 9.0 3/10/92 8.5 8.5 6/24/93 8.0 8.0 PROJECTED 6/1/95 7.3 7.2 RIA -2312 INTERVAL 509 days 471 days 708 days x- * - * - * - * -

  • I -*-------::!(

........ -.. --------------. --. ----------------------- -~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION R/Hr DATE AS FOUND AS LEFT INTERVAL N/A 10/19/90 9.3 NONE 3/10/92 9.1 9.0 509 days 1.6 6/24/93 8.5 8.2 471 days PROJECTED 6/1/95 8.0 708 days 7.4 RIA-2322

c 9

ii: x- - - - - - - - - - - )!( 8 7 6 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 57

SURVEILLANCE REQUIREMENTS 4.17.5 #2, 8 & 9, and 10 & 11 Calibration of Several Indicator Channels at the Alternate Shutdown Panel One channel each of indication of several plant parameters are required to be operable when the PCS temperature is above 300°F by LCO 3.17.5. 58 In the unlikely event that a fire would make the control room unhabitable, a set of key plant parameters are displayed on the Alternate Shutdown Panel. This LCO requires the subject instruments to provide operable indication only. Several of the instruments listed in this LCO use the transmitter from instrument loops used for normal operation. When the instruments at the Alternate Shutdown Panel are to be placed in service, operation of a pair of transfer switches disconnects the shared transmitters from their normal instrument loop and connects them to the loop providing indication at that panel. This switch over is performed quarterly to accomplish the required Channel Check. Calibration is typically performed each refueling in conjunction with the transmitters' normal channels. Deferral of the 18 month calibration has been requested for the Pressurizer Pressure indicator, and the steam generator pressure and level indicators channels. Alternate Shutdown Pressurizer Pressure Indicator Drift Data (TS 4.17.5 #2) One channel of pressurizer pressure is displayed on the alternate shutdown panel. The indication is provided by Rosemount pressure transmitter PT-0110. The output of this transmitter is displayed only at the alternate shutdown panel. Evaluation of past drift data for this transmitter indicate that it is not expected to drift out of tolerance during the extended calibration interval. The drift data for this channel follows this discussion section. Alternate Shutdown Panel SG Pressure Indicator Drift Data (TS 4.17.5 #8 & 9) One channel of steam generator pressure indication for each steam generator is provided at the auxiliary shutdown panel. These indications are provided by Rosemount pressure transmitters PT-0751A for steam generator A and PT-0752A for steam generator B. These transmitters also provide input to the RPS for the low steam generator pressure trip function. The data provided for the low steam generator trip setpoint (Technical Specification 4.17.1.10 and 4.17.1.11) is a compilation of drift associated with these transmitters and the RPS bistable. Refer to the RPS low steam generator level trip setpoint for a further discussion. SEE DATA PRESENTED FOR TS 4.17.1 # 10 & 11 Alternate Shutdown Panel SG level Indicator Drift Data (TS 4.17.5 #10 & 11) One channel of wide range level is for each steam generator is displayed at the alternate shutdown panel. These level indicators are normally de-energized and can only be turned on by actuating a transfer switch out the local panel. Refer to the discussion on wide range steam generator level (Technical Specification 4.17.4.11 and 4.17.4.12) for further information.

PT -0110 TS SETTING SETPOINT DRIFT TOLERANCE PSIA NONE N/A 60 AL TERNA TE SHUTDOWN SYSTEM Pressurizer Pressure 4.17.5.2 CALIBRATION DATE AS FOUND AS LEFT 1/22/91 7.3 3/30/92 7.3 5.1 10/22/93 -50.0 0.0 PROJECTED 6/1/95 0.0 -56.7 INTERVAL 435 days 571 days 588 days MAXIMUM INDICATION ERROR PT -0110 75 cc 25 Vi c.. -25 x- - - - - - - - - +-.____ )f( )I(

+

- - - - - - - - - - - - - - - - - ::!( -75 6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 59

LT -0757A TS SETTING SETPOINT DRIFT TOLERANCE % LEVEL NONE N/A 10 MAXIMUM INDICATION ERROR 15 ALTERNATE SHUTDOWN SYSTEM SG Level 4.17.5.10-11 CALIBRATION DATE AS FOUND AS LEFT 2/14/91 -0.25 4/8/92

  • 0.44

-0.44 7/12/93 -0.19 -0.19 PROJECTED 6/1/95 -0.49 0.19 LT-D757A INTERVAL 421 days 461 days 689 days 10 -------------------------------------------------------- ....I LU LU ....I 5 0 x- - - - - - - - - -.+-------)!( ~ -5 -10 -15 +---~--~-------+------~--~--~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 LT -0758A CALIBRATION % LEVEL DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 2/14/91 0.19 SET POINT N/A 4/8/92 0.19 -0.19 421 days DRIFT TOLERANCE 10 7/12/93 -0.19 -0.25 461 days PROJECTED 6/1/95 -0.25 689 days -0.25 MAXIMUM INDICATION ERROR LT -0758A 15 10 ....I LU LU ....I 5 0 x-. -. -. -. -. -+* *------:;!( '?ft -5 -10 -15 +---~------+---_,_ _____ r-------< 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 60

SURVEILLANCE REQUIREMENTS 4.17.6 #4, 5, le, 17, & 18 Calibration of Several Instruments Providing Other Safety Functions LCO 3.17.6 requires several miscellaneous instruments to be operable. Each specified instrument has an individually identified LCO applicability, due to their varied functions. Deferral of the surveillance requirement for:

1)

Calibration of the temperature and flow indicators for main feedwater (used for steam generator water level control and for calorimetric calculations), 61

2)

CalibratiDn of the containment humidity monitor (used, in addition to daily checks of PCS inventory, as one of four indications of PCS leakage), and

3)

Functional testing and calibration of the opening interlock on the shutdown cooling suction valves (which prevents opening the manually actuated motor operated valves when PCS pressure exceeds the design pressure of the shutdown cooling system). Observed and projected drift data has been presented for each of these instruments. Calibration of Main Fedwater flow and temperature instruments Main feedwater flow transmitters, FT-0701 and FT-0702, are Rosemount Model 3051C differential pressure transmitters. These transmitters measure the differential pressure across flow venturies located in each of the main feedwater flow lines. The measured differential pressure is proportional to feedwater flow squared. The Rosemount 3051C transmitters currently installed in the feedwater flow instrument loops replaced Rosemount Model 1151 transmitters during our last refueling outage. For this reason, we do not have drift data available for the specific transmitters installed in this application. The drift of 0.15%/18 months specified by the manufacturer for the Model 3051C is, however, significantly better than the drift of 0.75%/18 months specified for the 1151 Model. Drift data for a similar Model 3051C transmitter is shown. This data indicates that this type transmitter is not expected to drift out of tolerance during the extended calibration interval. Main feedwater temperature detectors, TE-0706 and TE-0708, are resistance temperature detectors (RTDs) used to measure feedwater temperature in each of the two feedwater lines. The temperature is used to compensate the feedwater flow signal for changes in density. RTDs, themselves, are not typically calibrated. The RTDs provide an input into TT-0706A and TT-0708A, which convert the resistance of the RTD into a millivolt signal. The calibration data provided for the TEs indicates that they are not expected to drift outside of their calibration tolerances during the extended interval.

OTHER SAFETY FUNCTIONS Substitute for Main Feedwater Flow 4.17.6.4 ROSEMOUNT 3051C (PT-0701) CALIBRATION MA DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE SETPOINT N/A 3/23/92 0.04 days DRIFT TOLERANCE 0.16 6/14/93 0.06 0.06 448 days PROJECTED 6/1/95 0.09 718 days MAXIMUM INPUT ERROR ROSEMOUNT 3051C (PT-0701) 0.2 0.1 ~ 0 -0.1 -0.2 -!---~---~----+-------+---~--~ 2/17/92 9/4/92 ROSEMOUNT 3051 C (PT-0703) MA TS SETTING SETPOINT DRIFT TOLERANCE MAXIMUM INPUT ERROR 0.2 NONE N/A 0.16 3/23/93 10/9/93 4/27/94 11/13/94 CALIBRATION DATE AS FOUND AS LEFT INTERVAL 3/23/92 6/14/93 6/1/95 0.08 PROJECTED 0.14 0.04 0.08 ROSEMOUNT 3051C (PT-0703) 448 718 6/1/95 days days 0.1 ~ cc +--- ~ 0 -0.1 -0.2 -!------+---~---~----+-----~--~ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 62

TT-0706A OTHER SAFETY FUNCTIONS Main Feedwater Temperature 4.17.6.4 CALIBRATION

  • F NONE N/A 10 DATE AS FOUND AS LEFT INTERVAL TS SETTING SETPOINT DRIFT TOLERANCE MAXIMUM INPUT ERROR 15 3/23/92 6/14/93 6/1/95

-2.11 PROJECTED 0.84 TT-0706A -3.95 -2.11 448 days 718 days 10

u.

5 0 -5 +---------~ -10 -15 +--------+-----+-----.-------~---~ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 TT-0708A CALIBRATION

  • F DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE SETPOINT N/A 3/23/92

-6.70 DRIFT TOLERANCE 10 6/14/93 -2.55 -2.55 448 days PROJECTED 6/1/95 4.11 718 days MAXIMUM INPUT ERROR TT-0708A 15 10

u.

5 ~ 0 ~ -5 +--------- -10 -15 +---------~----+-----.----~--~ 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 63

64 Calibration of Containment Humidity Detectors (TS 4.17.6 #7c) Four humidity detectors are located within the containment with four control room indicators. These instruments are used to aid in leak detection. As stated in FSAR section 4.7.1, these detectors are required to be capable of detecting a 10% increase in containment humidity. They are used to detect changes in humidity. They are required to be operable when the PCS temperature is above 300°F. Two projections (HI-1813 and 1814) result in data outside the normal tolerance. These projections are based on the largest observed errors from a multi-point calibration. In each case the detector was out of tolerance only for humidity values near 100%. Since normal containment humidity is about 20% to 30% near the steam generators, and below 10% in the reactor cavity and the containment dome (the detector locations) precision at very high humidity values is not necessary; leakage would be suspected before those values are approached. Since the information from these detectors is used more for detecting short term trends than for determining a specific condition, neither slow drift nor small calibration errors would detract from their function. Three other types of leakage detection instruments are required by the TS (See

  • Table 3.17.6 #7). Surveillance extensions are not necessary for those instruments.

In addition a PCS inventory check is performed daily as further indication of system integrity. Two sets of data are provided. One displays the maximum deviation of any calibration point (where the high humidity points caused the out of tolerance projections); the other displays the deviations at the 40% indication point where accuracy is more important. In this normal region of use, the projected values are within tolerance.

Hl-1812 % HUMIDITY TS SETTING NONE SETPOINT N/A DRIFT TOLERANCE 10 MAXIMUM INDICATION ERROR 20 e:: 10 Ci OTHER SAFETY FUNCTIONS PCS Leak Detection, Cont. Humidity 4.17.6.7.d CALIBRATION DATE AS FOUND AS LEFT 2/19/91 -0.8 2/29/92 1.8 -0.6 5/5/93 -1.3 0.8 PROJECTED 6/1/95 5.9 -0.5 Hl-1812 2i:

i
c 0 X- - -

- -Y-r------'~ INTERVAL 377 days 432 days 757 days -20+-----'----'--~--~----+-------+---~-____, 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 Hl-1813 CALIBRATION % HUMIDITY DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 2/19/91 -0.8 SETPOINT N/A 2/29/92 -1.6 0.8 377 days DRIFT TOLERANCE 10 5/5/93 -7.5 -0.7 432 days PROJECTED 6/1/95 -2.2 757 days -15.2 MAXIMUM INDICATION ERROR Hl-1813 20 e:: 10 Ci ~ o x---------~ )!( )!( ~ -10

*---**-*-*------****-~t...........................

-20.!----~--~--~---+-----------~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 65

Hl-1814 % HUMIDITY TS SETTING NONE SETPOINT N/A DRIFT TOLERANCE 10 MAXIMUM INDICATION ERROR 20 ~ 10 Ci OTHER SAFETY FUNCTIONS PCS Leak Detection, Cont. Humidity 4.17.6.7.d CALIBRATION DATE AS FOUND AS LEFT 2/19/91 -0.8 2/29/92

  • 6.1 0.8 5/5/93
  • 2.6

-0.7 PROJECTED 6/1/95 -11.4 -6.6 Hl-1814 INTERVAL 377 days 432 days 757 days ~ 0 X-. _. _ ~

x

~ ';;ff!. -1 0 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -~ -204--------<--~----+-----+---~--~--~-____, 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 Hl-1815 CALIBRATION % HUMIDITY DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 2/19/91 -0.8 SETPOINT N/A 2/29/92 -1.2 -0.7 377 days DRIFT TOLERANCE 10 5/5/93 -1.1 0.8 432 days PROJECTED 6/1/95. -0.1 757 days 0.1 MAXIMUM INDICATION ERROR Hl-1815 20 o x-----------r. ------~ +-----~-----<---'----->--~----+-----+-----+---~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 66

DEVIATIONS@40% Hl-1812 % HUMIDITY TS SETTING NONE SETPOINT N/A DRIFT TOLERANCE 10 INDICATION ERROR@ 40% 20 OTHER SAFETY FUNCTIONS PCS Leak Detection, Cont. Humidity 4.17.6.7.d CALIBRATION DATE AS FOUND AS LEFT 2/19/91 0.3 2/29/92 0.7 0.0 5/5/93

  • 0.8

-0.1 PROJECTED 6/1/95 0.7 -1.4 Hl-1812 INTERVAL 377 days 432 days 757 days -20+----r-----+--~--~--~--~--~-~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 Hl-1813 % HUMIDITY TS SETTING NONE SETPOINT N/A DRIFT TOLERANCE 10 INDICATION ERROR@ 40% 15 10 I-C 5 CALIBRATION DATE AS FOUND AS LEFT INTERVAL 2/19/91 0.3 2/29/92

  • 1.3 0.0 377 days 5/5/93
  • 5.0

-0.1 432 days PROJECTED 6/1/95 -3.2 757 days -8.8 Hl-1813 0 x-. - - -. - - - +/---___

!(

~

  • ~

x ~ + '?f!!. -10 - - -.. - -.. - - - - - - - - -.. -................ -.. - - - - - - -.................... -.. - - - - - - - -.. ::i< -15 +----+----+----+-----+---------",---~---. 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 67

DEYIATIONS@ 40% Hl-1814 % HUMIDITY TS SETTING NONE SETPOINT N/A DRIFT TOLERANCE 10 INDICATION ERROR@ 40% 20 10 I-a OTHER SAFETY FUNCTIONS PCS Leak Detection, Cont. Humidity 4.17.6.7.d CALIBRATION DATE AS FOUND AS LEFT 2/19/91 0.4 2/29/92 -3.B -0.1 5/5/93 -2.2 -0.1 PROJECTED B/1/95 -8.1 -3.8 Hl-1814 INTERVAL 377 days 432 days 757 days ~ 0

i
c x

x ~ -10 .......... *............................................. ::t: -20+----+-------<-----t-----+-----+----+----+--~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 B/1/95 Hl-1815 CALIBRATION % HUMIDITY DATE AS FOUND AS LEFT INTERVAL TS SETTING NONE 2/19/91 0.3 SETPOINT N/A 2/29/92 -0.8 -0.1 377 days DRIFT TOLERANCE 10 5/5/93 -0.B 0.0 432 days PROJECTED B/1/95 -2.3 757 days -0.8 INDICATION ERROR@ 40% Hl-1816 20 0 x-. -. -. -. - -+------*-)i( -20+----+----+-------<e----~----+----+-----t---~ 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 68

69 Calibration of the Shutdown Cooling (SOC) Interlock (TS 4.17.6 #17) The shutdown cooling interlock is provided to protect SOC piping from being exposed to a PCS pressure greater than 300 psia. The interlock prevents opening of the Shutdown Cooling (SOC) suction valves from the PCS. Unlike some newer plants, the Palisades SOC interlock has no automatic closing function on high pressure. The valves concerned, M0-3015 and M0-3016, motor operated valves which are actuated by manual control room switches. PS-0104A and PS-0104B are electronic bistables located in the control room. They receive their signal from Rosemount 1154 transmitters PT-0104A and 0104B located in the containment air room. The instrument loops are calibrated using the end-to-end calibration method, where a known pressure is applied to the pressure transmitter and the remaining devices in the current loop are monitored. The end-to-end loop tolerance stated for PS-0104A and 0104B is 6 psia. The purpose of the end-to-end calibration is to obtain the optimum loop accuracy. The projected pressure switch settings for PS-Ol04A and 01048, using the drift from 1991-1992 is more than 6 psia lower than the desired setpoint. The projected lower setting would be in the conservative direction, which means the pressure switches will keep the PCS pressure isolated from the SOC piping until the PCS pressure decreases to the lower settings. For each instrument, the projection based on the most recent data is within tolerance. The potential for a slightly reduced interlock setting has little or no safety significance.

PS-0104A TS SETTING SETPOINT DRIFT TOLERANCE 285 280 cc 275 en 270 Cl.. 265 260 OTHER SAFETY FUNCTIONS SDC Suction Interlocks 4.17.6.17 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL NONE 1/2/91 279.2 280.2 3/4/92 273.5 280.2 429 days 6 6/12/93 281.9 278.5 465 days PROJECTED 6/1/95 268.9 720 days 281.1 PS-0104A X- - -

K

-.... ---.. -:-: --= :: - x-........ ------.. -...... ------............ --------. 255+--~~~~--+-~~~~--+-~~~~_,_~~~~~~~ 6/27/90 PS-0104B TS SETTING SETPOINT DRIFT TOLERANCE 285 280 cc 275 en 270 Cl.. 265 260 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 CALIBRATION PSIA DATE AS FOUND AS LEFT INTERVAL NONE 1/10/91 280.2 280.2 3/5/92 268.3 279.3 422 days 6 6/13/93 281.6 280.0 465 days PROJECTED 6/1/95 259.7 719 days 283.6 PS-01048 - - - -........... --............. -.............. -.. -............ --................ ---....... -----~

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- - - -- _.. -~. - - - ----- - - - - ------- - - --- --- ------------ - ---. -- --

  • x 255+--~~~~_,_~~~~~~~~~~~~_,_~~~~---<

6/27/90 1/13/91 8/1/91 2/17/92 9/4/92 3/23/93 10/9/93 4/27/94 11/13/94 6/1/95 70

ATTACHMENT 2 Consumers Power Company Palisades Plant Docket 50-255 PROPOSED ONE TIME SURVEILLANCE DEFERMENT TECHNICAL SPECIFICATIONS REVISED TABLE OF INSTRUMENT INFORMATION 7 Pages

~ Tech Specs Appl i cab i l i ty 4.17.6(7.c) > 300"F 2 4.17.3(2.c) > 210"F TABLE OF SURVEILLANCE REQUIREMENTS TO BE DEFERRED Description Channel Calibration; Containment Humidity Monitor Channel Cal ; Cont Isol Rad Monitors Instruments RIA 1805 RIA 1806 RIA 1807 RIA 1808 Due Date 03/22 04/24 1 Procedure RI-25 RI-86F Discussion All four channels are affected. TS require one channel each of: 1) sump level, 2) atmospheric radioactive gas monitoring, 3) humidity monitoring, and 4) air cooler condensate flow monitoring to be operable. Palisades has only one channel of radioactive gas monitoring, but has four instrument channels for each of the other parameters. Therefore many indications beyond the subject instruments are available to detect PCS leakage. Calibration cannot be completed on line due to location of instrument All four channel are affected. These instruments consist of an ion chamber, located inside the containment, and an instrumentation package with a readout in the control room. A bistable in the instrument package provides a contact closure input to the Containment High Radiation logic for containment isolation. These instruments provide a back up signal to containment pressure for initiation of containment isolation. Calibration cannot be completed on line due to detectors being located in areas of relatively high radiation.

~ Tech Specs Applicability 3 4.17.6(4 & 5) > 15% Power 4 4.17.2(2 b&c) ~ 300"F TABLE OF SURVEILLANCE REQUIREMENTS TO BE DEFERRED Description Channel Cal; Feedwater flow and temp for calorimetric. Instruments FT 0701 & 0103 TT 0706A & 0708A Channel Cal ; SIRWT level for RAS & Chnl Fune Test for RAS logic Instruments LS 0327 LS 0328 LS 0329 LS 0330 Due Date 04/28 05/05 Procedure RI-24 RI-14 Discussion One channel for flow and one for temperature is provided on each of two feedwater lines. These instruments provide inputs to the calorimetric calculator and to main feedwater control. The flow instruments measure differential pressure across a calibrated venturi in the main feedwater lines; the temperature detectors measure temperature with RTDs in the main feedwater lines. Footnote 3 describes differential pressure and temperature sensing instrumentation. These same flow instruments provide the signal for SG level control; it is not considered advisable to operate with SG level control in manual just to complete these SRs. The testing of both flow and temperature are combined in a coordinated test which verifies the calibration of the on-line calorimetric calculator. Several indications of plant power level are available to the operators, nuclear power, on-line primary calorimetric (delta-T power), electrical power, and secondary calorimetric power (from the subject instruments). Any instrument drift would cause a recognizable disparity between these indications. The subject instruments are not included in STS & do not meet the NRC criterion for inclusion in TS. Four conductivity probes are affected. The probes actuate the Recirculation Actuation Signal when they are uncovered by the decreasing water level in the tank. They are suspended on a cable from the top of the tank, with the length of the cable determining the setpoint. Therefore, they are not subject to the setpoint drift observed with an analog system. SIRWT level detectors are accessible for calibration, but channel functional testing cannot be done on line since it would initiate an actual Recirculation Actuation Signal. Calibration verification and channel functional testing are performed together as a coordinated test. An analog indication of SIRWT water level from a separate instrument is displayed in the control room. If the subject sensors were to fail, Recirculation could be manually actuated.

~ Tech Specs 5 6 4.1.2 4.17.6(17) 4.17.4(21) Applicability < 430"F > 200# > 300"F TABLE OF SURVEILLANCE REQUIREMENTS TO BE DEFERRED Description Channel Cal; Pressurizer pressure for LTOP & SOC interlock LTOP Instruments PT 0104A & B TT 0115 & 0125 TS 0115 & 0125 SOC Instrument PS 0104A & B Channel Cal; High Range Containment Radiation Monitors Instruments RIA 2312 RIA 2322 Due Date 05/09 No SD required 05/10 No SD Procedure RI-59 RI-866 3 Discussion These instruments provide an opening signal to the Power Operated Relief Valves (PORVs) for Low Temperature Over Pressure (LTOP) protection and to the opening interlock for the Shutdown Cooling (SOC) suction valves. The sensing instruments are pressure transmitters. Their arrangement is described in footnote 3. The pressure and temperature transmitters provide inputs to the LTOP setpoint digital calculator which determines the PORV pressure opening pressure as a function of PCS temperature. The temperature switches arm the LTOP circuit when PCS pressure is below 430"F. PORV automatic actuation is not required to be operable when above 430"F. Calibration could be delayed until after shutdown, but would need to be done prior to a cooldown. If these calibrations could not be completed due to a forced cooldown, the TS required action of cooling from 430"F to having the PCS vented in 8 hours would be difficult to meet. Calibration on line would involve working on a pressurized system without the normal double valve protection (see the discussion in footnote #2). The SOC interlock prevents opening the manually actuated motor operated valves which connect the PCS to the suction of the SOC pumps when PCS pressure is above the SOC system design pressure. Plant procedures direct the operators to verify that PCS pressure is below the maximum allowable SOC system pressure prior to opening these valves. Technical Specifications allow continued operation with this interlock inoperable if the circuit breakers for the valves are removed. Two high range radiation detectors are involved. These instruments consist of an ion chamber, located inside the containment, and an instrumentation package with a readout in the control room. They are used only for Post Accident Monitoring. These instrument detectors are located in an unshielded area well above the refueling floor. During reactor operation, the neutron radiation levels make the detectors inaccessible for calibration. The TS require two channels to be operable for post accident monitoring. These instruments provide no automatic actuations. TS action for both channels inoperable is to submit a report to NRC and restore them to operable status prior to startup.

~ Tech Specs 7 8 9 10 4.17.4(5&9) 4.16.l(c) 4.16.l(c) 4.17.1 ( 4&5) 4.17.2(1.d) 4.17.5(2) Appl i cab i l i ty > 300"F When Rx Critical When Rx Critical RPS 1 > 300"F > 300"F TABLE OF SURVEILLANCE REQUIREMENTS TO BE DEFERRED Description Channel Cal ; Subcooled Margin Monitor & Wide Range Pressurizer Pressure indication for Accident Monitoring Instruments PT Ol05A & B SMM 0114 & 0124 Fune Test; Mechanical Snubbers Test; Seismic Hydraulic Restraints Channel Cal; Pressurizer Pressure for Rx trip, SIS, & Alt SD Panel Instruments PA Ol02AL,BL,CL,DL PA 0102AH,BH,CH,DH PA 0102ALL,BLL,CLL,DLL PT 0110 (Alt SD Pnl) Due Date 05/11 05/13 SD 05/13 05/16 05/17 Procedure RI-69 RT-89 RT-45 RI-03 4 Discussion The subcooled margin monitor is a solid state calculator which receives input from both PCS temperature and pressure. Calibration is done in co-ordination with calibration of the PCS pressure channels. Two channels of Wide Range Pressurizer Pressure indication are also required to be operable. These channels use the same transmitter as the subcooled margin monitor. The TS require two channels to be operable for post accident monitoring. If both channels became inoperable, as would happen if the surveillance testing were not performed within the required interval, Action statements require one channel to be restored to o erable status within 48 hours, and the second within 7 days. Only one mechanical snubber (out of a total of five in the plant) is affected. It is located on the outlet of Safety Injection Tank T-82D. This snubber (SNB-71) was new in 1988; it was tested, inspected and re-greased in 1990. There have been no mechanical snubber test failures, at Palisades, since inspection and regreasing was initiated in 1988. Only two hydraulic snubbers (out of a total of ten in the plant) are affected. One is located on the LPSI line and one on the Letdown line. Both are inside the containment. Both these snubbers were new in 1990; their service life is conservatively limited at May 1996. There have been no hydraulic snubber test failures, at Palisades, since re-building was su lanted by re lacement in 1988. These instruments provide inputs to the Reactor Protective System for a High Pressure Reactor Trip and for the Thermal Margin/Low Pressure Trip, and inputs for initiation of Safety Injection on low PCS pressure. A single channel indicator at the Alternate Shutdown Panel is also provided. Four channels are affected. Footnote 3 describes the arrangement of pressure sensing channels. Channel checks performed each shift would disclose major failures or significant drift. Calibration on line is possible, but would involve working in the containment on a pressurized system without the normal double valve protection (see footnote 2).

[;;] Tech Specs Applicability 11 4.17.1(6) RPS 1 12 4.17.1(8&9) RPS 1 4.17.2(3 c&d) > 300"F 4.17.4(11&12) > 300"F 4.17. 5 (10&11) 13 4.17.1(10&11) RPS 1 4.17.3(3 c&d) > 210°F 4.17.4(13&14) > 300"F 4.17.5(8&9)

1)

RPS LCD APPLICABILITY IS: TABLE OF SURVEILLANCE REQUIREMENTS TO BE DEFERRED Description Channel Cal; PCS flow for Rx Trip Instruments DPT 0112AA,AB,AC,AD DPT 0112BA,BB,BC,BD DPT 0122CA,CB,CC,CD DPT 0122DA,DB,DC,DD FA 0102A,B,C,D Channel Cal; SG level for Rx trip, AF AS initiation, Accident Monitoring & Alt SD Panel Instruments Narrow Range: LT 0751A,B,C,D LT 0752A,B,C,D Wide Range LT 0757A (Alt SD Pn l) LT 0758A ( " " ) Channel Cal ; SG press for Rx Trip, SG lo Press Isolation, & Alt SD Panel Instruments PT 0751A,B,C,D PT 0752A,B,C,D PIC 0751A,B,C,D PIC 0752A,B,C,D Due Date Procedure 05/20 RI-01 05/22 RI-04 05/22 RI-05 Discussion Four channels are affected; each channel sums the outputs of four flow transmitters and compares the summed differential pressure signal to the low flow reactor trip setpoint. Footnote 3 describes the arrangement of sensing channels. Channel checks performed each shift would disclose major failures or significant drift. Calibration on line is possible, but would involve working in the containment on a pressurized system without the normal double valve rotection (see footnote 2). These instruments provide input to the reactor protective system (RPS) for each low SG level reactor trip, they also provide inputs to the AFAS panel for initiation of Auxiliary Feedwater. A single channel indicator of each SG's wide range level is provided at the Auxiliary Shutdown Panel, which uses the same transmitter as the control room wide range indicator. Four channels on each SG are affected. Footnote 3 describes the arrangement of differential channels. Channel checks performed each shift would disclose major failures or significant drift. Calibration on line is possible, but would involve working in the containment on a pressurized system without the normal double valve rotection (see footnote 2). These instruments provide input to the reactor protective system (RPS) for each low SG pressure reactor trip, they also provide inputs for initiation of the low SG pressure isolation of main steam and main feedwater. A single channel indicator of each SG pressure is provided at the Auxiliary Shutdown Panel, which use the same transmitter as the RPS inputs. Four channels on each SG are affected. Footnote 3 describes the arrangement of sensing channels. Channel checks performed each shift would disclose major failures or significant drift. Calibration on line is possible, but would involve working in the containment on a pressurized system without the normal double valve protection (see footnote 2). "when there is fuel in the reactor, more than one control rod is capable of being withdrawn, and the PCS is less than refueling boron concentration." 5

2) CA~NG A PCS PRESSURE SENSING INSTRUMENT WHILE THE PLANT IS OPERATING' The calibration of instruments sensing PCS pressure (#5, 7, & 10) or PCS differential pressure (#10) is both undesirable and difficult while the plant is operating since the PCS operates at over 2000 psia and over 550"F.

a) The transmitters are located inside the containment in a noisy, hot environment where the use of full anti-contamination clothing is required. These conditions increase both the difficulty of making precise instrument adjustments and the length of time necessary to accomplish the job. b) Performing the calibration with the PCS pressurized presents technical difficulties with the calibration process itself. Calibration of a pressure transmitter or differential pressure transmitter involves isolating the sensor from the sensing line(s) and connecting a test device. Only a single valve is available on the sensing line (the root valves are adjacent to the PCS piping and therefore inaccessible) to provide personnel protection from contamination with PCS water and to keep system pressure from affecting the calibration. c) When the isolation valve on the sensing line is reopened after completion of the calibration, a very severe pressure shock would be applied to the sensor. Such a pressure shock could affect the just completed calibration and is not considered good practice. d) The plant ALARA practice of back-flushing the -sensing lines with clean demineralized water would not be possible with the PCS pressurized. e) Plant personnel safety practices require two valve isolation prior to working on equipment connected to a high pressure system. As mentioned above, two valve isolation is not available for these instrument sensors when the plant is operating. f) Due to the above reasons, it has been plant practice to do the subject surveillance tests during a shutdown period. Performance with the plant on line would not only require some revision to each of the associated procedures, but would involve performing a new and untried, or at least very unusual, practice during plant operation. Calibration of instruments sensing steam or feedwater pressure (#3, 12, & 13) involve similar difficulties, with the exception of potential contamination. 6

3)

TER LOOP OPERATION: A typical instrumentation loop has a power supply, transmitter, indicator, and current switch all connected in series in a DC current loop. The transmitter is located in the proximity of the variable to be measured. The function of this transmitter is to convert the pressure, differential pressure, or temperature to a current signal that varies in direct proportion to the applied variable. Current is chosen over voltage because it can be transmitted large distances without electrical interference from devices located in the near vicinity of the wiring or components. This current passes through the indicator and switch. The current switch typically providing the automatic actuation of an alarm, trip, or permissive function. The pressure transmitters, for which we are requesting surveillance interval extensions, on are located within the containment and have%" stainless tubing connecting the sensing device to the primary coolant system. This tubing has a small tubing valve located at the transmitter and two ASME code specified valves (root valves) located as close to the primary piping as possible. There will be one tubing line for pure pressure measurement and two tubing lines for differential pressure. Differential pressure is used for level and flow signals. Pressure loops are calibrated by isolating the transmitter from the system then applying a known pressure to the transmitter then taking output readings from indicator and switch. The exact operating point of the switch is determined before any loop component is adjusted, thus all component inaccuracies and/or drift is determined. These readings are recorded as the "as found" data. If the loop does not meet the "f i na 1" acceptance tolerance ( "final" tolerance is typically% the "as found" tolerance) the individual loop components are calibrated. Following completion of a device calibration the loop "final" reading will be taken in exactly the same manner as the "as found" readings. Temperature loops operate in essentially the same manner except the sensor is usually a resistance device that varies with temperature. These RTDs are mounted directly in the flow streams being monitored with electrical wires leading back to the transmitter. Calibration of these type loops is the same a pressure loops except a known resistance is applied to the transmitter input. The temperature to resistance characteristics are physical parameters dictated by sensor construction. The calibration philosophy at Palisades is to place a known pressure or resistance on the instrument loop sensor and monitor the performance of the respective indication or control device. This is referred to as the loop calibration method. It was instituted in 1991 with the intention of minimizing individual component inaccuracies. The first variable measured when an instrument loop is tested is to obtain the "as found" reading for the entire loop. The last test performed is to take a "final" reading for the entire loop. The drift analysis supplied in Attachment 2 is based on these loop "as found" and "final" values and their differences from the expected values. This technique is used any time there are more than one piece of instrumentation interconnected in a common instrumentation loop. 7 '}}

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