IS 15399 : 2003 Hardware for Computers in the Safety System of Nuclear and Radiation Facilities

1 Scope

1.1 This standard is applicable to computer systems hardware forsystems important to safety used in nuclear facilities. It is,therefore, applicable to safety systems and in general tosafety-related systems.

1.2 The requirements specified are applicable but not restrictedto the following items of such systems, down to the componentlevel:

a) External power supplies to the computer system;

b) Internal architecture;

c) Input/Output equipment and interfaces;

d) Data transmission means;

e) Storage devices; and

f) Test devices to prove continued correct operation as far asany Failure of these devices leads to failure of the computersystem.

2 References

IS 7354 Guide on reliability of electronic and electrical items:

    Part 1 : 1975 Preliminary reliability considerations

    Part 2 : 1984 Reliability and maintainability management

    Part 3 : 1984 Presentation of reliability data on electronicand electrical components (or parts)

    Part 4 : 1974 Collection of reliability, availability andmaintainability data from field performance

    Part 5 : 1975 Inclusion of lot-by-lot and periodic inspectionprocedures in specifications for
    electronic and electrical components (or parts)

    Part 6 : 1983 Inclusion of reliability clauses intospecifications for components (or parts)

IS 9692 Guide on maintainability of equipment:

    Part 1 : 1980 Introduction to maintainability

    Part 2 : 1980 Maintainability requirements in specificationsand contracts

    Part 3 : 1981 Maintainability programme

    Part 4 : 1987 Test and diagnostic procedures

    Part 5 : 1985 Maintainability studies during the design phase

    Part 6 : 1983 Maintainability verification

    Part 7 : 1984 Collection, analysis and presentation of datarelated to maintainability

    Part 8 : Sec 1 : 1988 Maintenance and maintenance supportplanning, Section 1 General

    Part 8 : Sec 2 : 1988 Maintenance and maintenance supportplanning, Section 2 Maintenance
    support analysis

    Part 8 : Sec 3 : 1988 Maintenance and maintenance supportplanning, Section 3 Maintenance
    planning analysis

    Part 8 : Sec 4 : 1988 Maintenance and maintenance supportplanning, Section 4 Maintenance
    support resources requirements

IS 11137 : Part 2 : 1984 Analysis techniques for systemreliability: Part 2 Procedure for failure mode and effectsanalysis (FMEA) and failure mode, effects and criticality analysis (FMECA)

IS 14700 Electromagnetic compatibility (EMC):

    Part 1 : Sec 1 : 2000 General, Section 1 Application and interpretation offundamental
    definitions and terms

    Part 3 : Sec 2 : 1999 Limits, Section 2 Limits for harmonic current emissions(equipment input
    currents ≤ 16A per phase)

    Part 3 : Sec 3 : 1999 Limits, Section 3 Limitations of voltage fluctuationsand flicker in low
    voltage supply systems for equipment with rated current ≤16A

    Part 4 : Sec 1 : 1999 Testing and measurement techniques,Section 1 Overview of immunity tests
    - Basic EMC publication

    Part 4 : Sec 2 : 1999 Testing and measurement techniques, Section 2 Electrostatic discharge
    immunity test- Basic EMC publication

    Part 4 : Sec 4 : 1999 Testing and measurement techniques,Section 4 Electrical fast
    transient/burst immunity test

    Part 4 : Sec 8 : 1999 Testing and measurement techniques,Section 8 Power frequency magnetic
    field immunity test

    Part 4 : Sec 9 : 1999 Testing and measurement techniques,Section 9 Pulse magnetic field
    immunity test

    Part 4 : Sec 12 : 1999 Testing and measurement techniques,Section 12 Oscillatory waves
    immunity test

    Part 4 : Sec 15 : 2001 Testing and measurement techniques,Section 15 Flickermeter functional
    and design specification

    Part 4 : Sec 16 : 2001 Testing and measurement techniques,Section 16 Test for immunity to be
    conducted common mode disturbances in the frequency range 0 Hz to 150 kHz

    Part 6 : Sec 3 : 2002 Generic standards,Section 3 Emission standards for residential,
    commercial and light industrial environment

IS 15398 : 2003 Software for computers in the safety systems ofnuclear and radiation facilities