Page 1 (4)
PROCEDURE AND REQUIREMENTS FOR INSTALLATION OF
ELECTRICAL EQUIPMENT
Heading
Designation
Installation Material
MBE 103
version
4 en
Content
1
1.1
1.2
2
3
3.1
3.2
3.3
3.4
4
4.1
4.2
Designation
GENERAL...................................................................................2
Scope ...........................................................................................2
Prerequisites ................................................................................2
DEFINITIONS.............................................................................2
INSTALLATION REQUIREMENTS.........................................3
General ........................................................................................3
Requirements in Nuclear Regulations .........................................3
Standardisation ............................................................................3
Technical Requirements ..............................................................3
INSTALLATION ........................................................................4
Typical Environmental Condition ...............................................4
Environmental Factor ..................................................................4
Version
MBE 103
2016-02-16 (533548151)
Date
4 en
Replaces
2006-03-27
3 en
MBE 103
1
GENERAL
1.1
Scope
Version 4 en
Sid. 2 (4)
MBE 103 contains requirements for installation material and choices of such material
for electrical installation. The requirements focus on the special requirements for
installation in safety classified areas (function class 1E).
1.2
Prerequisites
Material shall be qualified or of proven design for use in the intended application.
Electrical materiel must comply with applicable sections of the Swedish National
Electric Regulation, “ELSÄK-FS” general advice.
Environmental requirements and supplementary requirements shall be determined for
each area and for each component in which electrical installation will be carried out.
2
DEFINITIONS
Typical environmental conditions in a nuclear power plant have been divided into three
basic levels of severity, depending on the location of equipment.
Severity A
Applied to equipment located outside the reactor containment, in areas where no hot
process systems are installed. The level of ionising radiation is negligible.
[TBE 101]
Severity B
Applied to equipment located outside the reactor containment, in areas with hot process
systems. The equipment is exposed to ionising radiation.
[TBE 101]
Severity C
Applied to equipment located inside the reactor containment. The equipment is exposed
to ionising radiation.
[TBE 101]
Hot Component
Components that through heat emission from e.g. process pipe the wide cable's
connection point is set for temperature in excess of +50°C outside reactor inclusion
alternative +70°C in reactor inclusion must be mounting/connected with special adapted
to environmental materials. Hot objects in this sense are specified in special list.
.
2016-02-16 (533548151)
MBE 103
3
INSTALLATION REQUIREMENTS
3.1
General
Version 4 en
Sid. 3 (4)
Installation material must have the correct properties as regards tolerance for high/low
temperatures, damp/water, vibration, seismic requirements, radiation and other electrical
and mechanical requirements applicable to the actual installation and testing.
It shall also be well suited to final use during operation and maintenance, and shall have
the desired ageing properties and the correct properties and resistance to fire.
3.2
Requirements in Nuclear Regulations
For security classified components and equipment (function class 1E) applies special
nuclear requirements e.g requirements to clarify breakdown, earthquake and fire.
Which requirements that apply from the specific equipment be concluded from technical
specification. In addition to international standards, special Swede can addition
requirement apply.
Mounting material in the form of expanding fasteners and fire seals will be standard
approval certificate according to National Board of Housing, Building and Planning's
construction rules in applicable security class.
3.3
Standardisation
Products shall comply with the requirements, which are in line with the accepted
standard in the nuclear industry, or for the individual product.
3.4
Technical Requirements
Detailed technical requirements for electrical equipment or components in nuclear
power stations are noted in the TBE.
2016-02-16 (533548151)
MBE 103
4
INSTALLATION
4.1
Typical Environmental Condition
Version 4 en
Sid. 4 (4)
Requirements for the environmental endurance of components vary depending on the
area where the installation is to be done. The areas are subdivided as follows
4.2
Room Type
Environmental Conditions
Notes
Control room
Severity A
Supplementary requirements
for temperature, vibration etc
may occur.
Room for electrical
equipment
Severity A
-“
Process room
Severity A (B)
-“
Hot process room
Severity B
-“
Reactor containment
Severity C
-“
Environmental Factor
Installation material must be selected with consideration given to both the requirements
associated with each basic level of severity and with any extra requirements needed to
withstand the environmental factors found in each area. The choice of material shall
then be made with consideration given to the following:
2016-02-16 (533548151)
Environmental factor
To be considered
Temperature
Hot components, condensation
Damp and water
Immersion, spraying, high pressure washing, dipping
Chemical action
E.g. salt mist, salt and sulphur compounds
Mechanical action
Sand and dust particles. Protection from abrasion.
Bending radii of cables etc.
Vibration
Normal operation and during malfunctions
Radiation
Normal operation and during malfunctions, risk of
contamination