ML20082K893
| ML20082K893 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/28/1983 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM 5211-83-323, NUDOCS 8312050333 | |
| Download: ML20082K893 (10) | |
Text
o GPU Nuclear Corporation Nuclear
- ,ome::;48o s
S Middletown, Pennsylvania 17057 0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number:
November 28, 1983 5211-83-323 Office of Nuclear Reactor Regulation Attn:
J. F. Stolz, Chief Operating Reactors Branch No. 4 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Sir:
Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 NUREG 0737 Post Accident Monitoring (II.F.1)
In order to assist in the post implementation review of the Containment Pressure Monitor (II.F.1.4) and the Containment liydrogen Monitor (II.F.1.6),
enclosed please find the required design information.
Instrument accuracy and response times are also provided in response to your request of July 19, 1983.
Sincerely, af H. D. I kf11 Director, TMI-l llDil: RAS:vj f l
Enclosure cc:
T. E. Murley J.
Van Vliet 8312050333 831128 PDR ADOCK 05000289 P
PDR Ad44 f
GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation
l 4
_ CONTAINMENT PRESSURE MONITOR Item (1)
Design and qualification criteria are outlined in Appendix A.
j Respcase See Attachment II.
Item (2)
Measurement and indication capability shall extend to 5 psia for subatmospheric containments.
i
Response
Each redundant channel is comprised of a narrow range (-5 psig to
+5 psig) and a wide range (0-175 psig) transmitter, associated signal conditioning equipment and a 2 pen strip chart recorder.
Item (3)
Two or more instruments may be used to meet requirements. However, instruments that need to be switched from one scale to another to meet the range requirements are not acceptable.
e
Response
See response to Item (2).
Item (4)
Continuous display and recording of the containment pressure over the specified range in the Control Room is required.
Response
A dual channel strip chart recorder provides continuous display of containment pressure and a permanent record of the display on a strip of recording chart paper in the Control Room. An output signal from each containment pressure monitoring system is inputted to the plant computer.
Item (5)
The accuracy and response time specifications of the pressure monitor shall be provided and justified to be adequate for their j
intended function.
l
Response
See Attachment B.
Ref: Restart Report Sect. 2.1.2.1 FSAR Update Section 7.3.2.2.c 11) a) l l
l
(
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CONTAINENT HYDROEN MONITOR It.em (1)
Design and qualification criteria are outlined in Appendix A.
Response
See Attachment A.
Item (2)
The continuous indication of hydrogen concentration is not :cQuirad during normal operation.
(If an indication is not available at all times, continuous indication and recording shall be functioning within 30 minutes of the initiation of safety injection.)
Response
The Containment Hydrogen Monitor recorder and analyzer is on-line continuously. The sampler is on " Standby" and placed in the
" Analyze" mode in the event of a LOCA.
Item (3)
The accuracy and placement of the Hydrogen Monitors shall be provided and justified to be adequate for their intended function.
Response
The Hydrogen Monitor measurement capability is over a range of 0-10 volune percent within an accuracy of + 1.94% of full scale under both positive and negative containment pressure. The sample points are located near the dome. Since Hydrogen is lighter than air it will accumulate at the top of the reactor building.
The analyzer alarms in the Control Room at 2% hydrogen by volume.
Ref: Restart Report Section 2.1.2.1 0859K
ATTACHMENT A DESIGN AND QUALIFICATION OF THE CONTAINMENT PRESSURE MONITOR (1)
Seismic / Environmental Qualification - The seismic qualification of the pressure transmitter and signal conditioning equipment is in accordance with RC 1.100 and IEEE-344 1975. Each channel recorder and associated power supply has a steel protective shield surrcunding them to serve as a seismic barrier from other non seismic qualified components.
Environmental qualification of the contalimc.d. pressure monitor was included in licensee letter 5211-83-076, May 16, 1983.
(2)
Single Failure - The containment pressure monitor is composed of redundant safety grade, Class lE equipment channels and power sources which have both narrow and wide range recorder indication and are therefore single failure proof.
(3)
Power Sources - The containment pressure monitor is energized by separate power supplies from Class lE uninterruptible power. The signal conditioning cabinets provide additional isolation of the non IE computer signal from the 1E recorder signal in each channel.
(4)
Availability - The containment pressure indicator is in constant operation during all plant operating modes, infrequent operation, accident conditions and post accident conditions. Operability requirements have been addressed in Technical Specification Change Request No. 114.
(5)
QA Requirements - The portion of the containment pressure indication external to the Control Room panel has been designated nuclear safety related under the applicable section of the GPUN OQA Plan.
(6)
Continuous Indication - See response to Item (4). Any component malfunction or loss of power leaves intact a redundant channel for indication.
(7)
Recording Instrumentation - The 0-10 VDC output signal of each channel is routed to 1 of 2 Bailey Controls 2 pen recorders in the Control Room with strip chart output for trending.
(8)
Display Instrumentation - The recorders are mounted on the front of the PLF vertical panel, behind the control console. This will be a normal CR0 work area for post-accident conditions.
(9)
Isolation - See (3)
(10) Testing - The containment pressure monitors will be checked shiftly, tested monthly and calibrated each refueling. Surveillance requirements have been addressed in Technical Specification Change Request No. 114.
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(11) Surveillance - See (10)
(12) Removal From Service - The containment pressure monitor is designed such that all functional tests can be performed on line without affecting other reactor systems. Any testing that is required to be performed offline shall not be required to be performed at less than 18 month intervals.
(13) Access for Adjustment - The transmitters for containment pressure monitoring are located in the Auxiliary Building at elevation 305' near containment penetration 340 and 350. The signal condition cabinets are located in the Control Building at elevation 322' and the recorders are located in the Control Room. All equipment is accessible for adjustment.
(14) Anomalous Reading - Anomalous readings are reduced to a minimum by (2) and (3).
(15) Ease of Repair - See (13)
(16) Directly Measured Variable Sensors - Containment Pressure is a directly measured variable.
(17) Normal / Accident Ranges - See response to Item (2).
(18) Periodic Testing - See (10) 0859K
DESIGN AfD QUALIFICATION OF THE CONTAINENT HYDROEN MONITOR (CHM)
(1)
Seismic / Environmental Qualification - The sample lines are supported seismically as is all other equipment in accordance with Reg. Guide 1.100 and IEEE 344-1975.
The environment qualification of the Containment Hydrogen Monitor has been reviewed against the DDR Guidelines. The results of this evaluation have been included in licensee letter 5211-83-076, May 16, 1983.
(2)
Single Failure - The Containment Hydrogen Monitor has redundant safety grade channels and is powered by a class 1E power source and therefore, single failure proof. The alarms and camputer inputs are not safety related.
(3)
Power Sources - The power supplies for the Hydrogen Monitor are provided from redundant 1E power supplies (vital bus).
(4)
Availability - The CHM is on-line continuously during normal operations. Sanples are drawn continuously during accident and post accident conditions. Operability requirements have been addressed in a Tech Spec. Charge Request No. 114.
(5)
QA Requirements - The CHM with the exception of the alarms and computer inputs are nuclear safety related and the applicable sections of the GPU Nuclear 00A Plan are invoked.
(6)
Continuous Operation - See (4)
(7)
Recording Instrumentation - A recorder for each channel is located in the Control Rocm and will provide continuous recordirg.
(8)
Identification - The Containment Hydrogen Manitoring instrumentation has been " human factored" and the recorders are located on the left front panel in the Control Room.
(9)
Isolation Devices - The CHM System is self contained and does not interface with other systems. Therefore no isolation devices are provided.
(10) Testing - The Containment Hydrogen Monitor will be checked shif tly, tested monthly and calibrated each refueling per Technical Specification Change Request No. 114.
(11) Surveillance - See (10)
(12) Removal From Service - Testing shall be performed in accordance with the applicable portions of Reg. Guide 1.118 for testing of instrument channels.
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I (13) Access for Adjustment - The hydrogen analyzers are located in the Intermediate Building El. 295'-0" and 322'-0" and are accessible for adjustment, calibration and testing.
(14) Anomalous Reading - Anomalous indications are prevented by (2) and (3).
(15) Ease of Repair - See (13)
(16) Directly Measured Variable Sensors - Separate sampling lines run to each analyzing unit allow direct monitoring at containment atmosphere for hydrogen concentration.
(17) Nannal/ Accident Ranges - See response to Item (3).
(18) Periodic Testing - See (10) and (12).
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ATTACHIENT B INSTRUhENT ACCLEACY AND RESPONE TIbES Pressure Monitoring System (II.F.1.4)
(a)
Instrument Block Diagram l
4 (b)
Module Parameters Module 1 PT 981A Wide Range Contain. Pres. Transmitter Rosemount Model ll53D Ref: Ros. Prod. Spec. Sheet 2302 Range: 0-300 psi Span: 0-175 psi Accuracy (incls linearity, hysteresis, & repeat.): +.25% span Stability: +.25% of Upper Range Limit (URL)
Temp Effect: _ +.50% of span /100 degrees F Response Time:~ (63% at 100oF) 0.2 seconds Module 2 PY 981AA Current to voltage converter Foxboro N2 AI-12V Ref: Fox Spec. Sheet TI 2AI-130 Output Span: 0-10V Accuracy: + 0.25% of output span Supply V Effect: + 0.2% span for + 5% change Ambient temp. effect: +.5% span max. for 100F change Module 3 PY 981AC V to V Isolator Converter Foxboro N2AO-V2I Ref: Fox Spe^ Sheet 2AO-130 Output span: 0-10V Accuracy: + 0.5% of output span Repeatabili~t'y : Less than 0.1% of output span Supply V effect: + 0.5% of output span for 5%
Ambient temp effect: Less than + 0.5% span for Sn change 0859K
Module 4 PR 981 Containment Monitor Recorder Bailey 771 Recorder Ref: Bailey Prod. Spec E12-771 Input span: 0-10V/0-175 psi Accuracy: 1 0.5% of span Linearity: 1 0.3% of span Hysteresis: + 0.3% of span Deadband: + 0.2% of span Response: less than 1 sec. for 100% pen travel to 100% input sig. change (c)
Overall System Uncertainty One Sigma at normal operating conditions S = 1 555% of span
= 1 971 psi (d)
Time Constants See data for modules 1 & 4.
Hydrogen Monitoring System (II.F.1.6)
(a)
Instrument Block Diagram g
g (b)
Module Paraneters Module 1 AE 428 Hydrogen Analyzer Consip Inc. Model K1 11 Ref: Consip Instr. Manual GPU #990-622 Output Span: 4-20 ma (0-10% or 0-20% Hydrogen)
Accuracy: 1 5% full scale Repeatability: 1 2% one week Response Time: 90% full scale less than 60 sec.
Module 2 AY 42B Current to Voltage Converter Fox Spec. Sheet T1 2ALI-130 Output Span: 0-10V Accuracy: 1 25% of cutput span Supply V Effect: 1 0.2% span for 1 5% change Antient Temp Effect: 1 0.5% Span Max for 500F change 0859K
Module 3 AY 4288 Signal Conditioner Foxboro N2 AP + SGC Ref: Fox Spec Sheet Tl 2AP-140 Output Span: 0-10V Accuracy: + 0.5% Output Span Repeatability: less than 0.1%
Supply V Effect: less than 0.5% for 5% variation Ambient T Effect: less than 0.5% for 500F change Module 4 AY 42BC V to V Isolator Converter Foxborn N2AO-V2I Ref: Fox Spec Sheet 2AO-130 Output Span:
0-10V Accuracy: + 0.5% of output span Repeatability: less than 0.1%
Supply V Effect: + 0.5% of output span for 5% change Ambient T Effect: less than 0.5% span for 50 F change Module 5 AR 428 Hydrogen Monitor Recorder Bailey 771 Recorder Ref: Bailey Prod Spec E12-771 Irput Span: 0-10V Accuracy: + 0.5% span Linearity: + 0.3% span Hysteresis: + 0.3% span Deadband: + U.2% span Response: less than 1 sec. for 100% pen travel to 100% input change (c)
Overall System Uncertainty One sigma at normal operating conditions.
S = + 1.94% of span
= 7.388% Hydrogen (0-20% H Scale)
= _7.194% Hydrogen (0-10% H Scale)
(d)
Location of hydrogen monitor intake ports There is one sample port for each of the HMS system. Both sample points are located high in the RB containment at appIuximately 460'-0" elevation.
~
(e)
There are no obstructions that would prevent the Hydrogen escaping from the core from reaching the sample point quickly.
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