NB/T 20149-2012 English PDF (NBT20149-2012)

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NB/T 20149-2012: Qualification procedure for pressure transmitter important to safety of nuclear power plants
NB/T 20149-2012
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.120.99
F 82
Filing number: 38339-2013
Qualification procedure for pressure transmitter
important to safety of nuclear power plants
ISSUED ON: OCTOBER 19, 2012
IMPLEMENTED ON: MARCH 01, 2013
Issued by: National Energy Administration
Table of Contents
Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Qualification test requirements ... 9 
4.1 General requirements ... 9 
4.2 Basic requirements for qualification tests ... 9 
4.3 Qualification test documents ... 9 
5 Program of qualification test ... 9 
5.1 Basic requirements ... 9 
5.2 Description of qualification device ... 10 
5.3 Qualification test conditions ... 10 
5.4 Qualification life goals ... 11 
5.5 Qualification margin ... 11 
5.6 Monitoring of functional characteristics during test ... 12 
5.7 Selection of test samples ... 12 
5.8 Evaluation of aging effects ... 12 
5.9 Maintenance during the test ... 13 
5.10 Test sequence ... 13 
5.11 Acceptance criteria ... 14 
5.12 Evaluation of test process ... 14 
6 Qualification test ... 15 
6.1 Compliance inspection and test preparation ... 15 
6.2 Reference test ... 16 
6.3 Test of influence quantity limit ... 20 
6.4 Test for evaluating the performance change of equipment over time ... 33 
6.5 Simulation test of design basis accident ... 39 
7 Records and reports ... 47 
7.1 Qualification test record ... 47 
7.2 Qualification test report ... 47 
Appendix A (Informative) Descriptions of pressure transmitter’s characteristics
... 48 
Appendix B (Informative) Accuracy calculation ... 50 
Appendix C (Informative) Typical LOCA test curve ... 53 
Qualification procedure for pressure transmitter
important to safety of nuclear power plants
1 Scope
This standard specifies the test methods, test items and sequence, test and
acceptance criteria during the test period for the qualification of the pressure
transmitter important to safety of nuclear power plants (including positive,
negative gauge pressure, differential pressure and absolute pressure).
This standard is applicable to the qualification of pressure transmitters for PWR
nuclear power plants, not to the software qualification of intelligent pressure
transmitters. The pressure transmitter of other types of nuclear power plant may
refer to this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 2423.1 Environmental testing for electric and electronic and electronic
products - Part 2: Test methods - Tests A: Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part
2: Test methods - Tests B: Dry heat
GB/T 2423.3 Environmental testing - Part 2: Testing method - Test Cab:
Damp heat, steady state
GB/T 2423.4 Environmental testing for electric and electronic products - Part
2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.5 Environmental testing for electric and electronic products - Part
2: Test methods - Test Ea and guidance: Shock
GB/T 2423.10 Environmental testing for electric and electronic products -
Part 2: Tests methods - Test Fc: Vibration (sinusoidal)
GB/T 29308 Management requirement of ageing of instrumentation and
control systems important to safety for nuclear power plants
GB/T 12727 Qualification of safety class electrical equipment for nuclear
power plants
GB/T 13625 Seismic qualification of electrical equipment of the safety
system for nuclear power plants
GB/T 15478 Test methods of the performances for pressure
transducer/sensor
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test
GB/T 18271.2 Process measurement and control devices - General methods
and procedures for evaluating performance - Part 2: Tests under reference
conditions
GB/T 26168.2 Electrical insulating materials - Determination of the effects of
ionizing radiation - Part 2: Procedures for irradiation and test
NB/T 20040 Seismic qualification test rules of safety classified electrical
equipment for nuclear power plants
JJG 882 Verification regulation of the pressure transmitter
3 Terms and definitions
The terms and definitions defined in GB/T 12727 as well as the following terms
and definitions apply to this document.
3.1
Pressure transmitter
The instrument that converts the process variables (pressure, pressure
difference, liquid level, flow) into 4 mA ~ 20 mA standard electrical signals
3.2
Gauge pressure (or absolute pressure) transmitter
Transmitter whose output electrical signal is proportional to gauge pressure
(or absolute pressure) applied to the pressure tap.
3.3
Differential pressure transmitter
4 Qualification test requirements
4.1 General requirements
The qualification of the pressure transmitter shall prove that during the life of
the qualification, under the environmental conditions of the design basis
accident, the pressure transmitter important for safety has the characteristics of
implementing the safety functions specified in the technical specifications
(including insulation resistance, accuracy, response time) .
The qualification test shall also determine the qualification life and end-of-life
status indicators of the pressure transmitter that needs to implement safety
functions in a harsh environment, as well as the installation method and
interface configuration of the pressure transmitter in the field.
4.2 Basic requirements for qualification tests
Each qualification test of the pressure transmitter shall be performed on the
same type of pressure transmitter. The test sample shall be consistent with the
actual transmitter in terms of design, material and manufacturing process. The
test conditions shall meet or exceed the most severe environmental and
operating conditions that may actually be experienced.
4.3 Qualification test documents
The qualification test results of the pressure transmitter shall be documented
as evidence that the pressure transmitter can implement its safety function
during the qualification life period and design basis accident period.
5 Program of qualification test
5.1 Basic requirements
The qualification of the pressure transmitter shall first compile the applicable
qualification test program, detailing the inspections, tests, performance
indicators, acceptance criteria, required analysis as required by the test
sample’s qualification test to prove that the pressure transmitter implements its
safety function.
The qualification test program shall include at least the requirements of 5.2 ~
5.12.
h) Input and output signal ratings and operating limits;
i) Electromagnetic interference (EMI), radio frequency interference (RFI),
power surges;
j) Software communication logic (only for smart transmitters).
5.3.2 Test conditions for design basis accidents
The qualification test program of the pressure transmitter shall determine the
simulation test conditions during and after the following design basis accidents,
as well as the duration required to impleme...