Illinois Administrative Code › Title 32 - ENERGY › Part 505 - SAFE OPERATION OF NUCLEAR FACILITY BOILERS AND PRESSURE VESSELS › Subpart C - NON-ISI BOILERS AND PRESSURE VESSELS › Section 505.2000 - Standards for Design, Construction, Operation and Inspection

Current through Register Vol. 48, No. 28, July 12, 2024
Non-ISI boilers and pressure vessels, including related
				  appurtenances, except those exempt under Section
				  505.50(a),
				  operated within or upon or in connection with a nuclear facility in Illinois,
				  shall be designed, constructed, installed, examined, tested, repaired, altered
				  and inspected as required by this Section, except in those cases in which NRC
				  has jurisdiction, as determined by NRC. When NRC has jurisdiction, the codes
				  and standards reflected in the facility's Operating License, Final Safety
				  Analysis Report, technical specifications or other licensing documents as
				  required or approved by the NRC shall apply. For non-ISI boilers and pressure
				  vessels over which NRC has no jurisdiction, as determined by NRC, the standards
				  required by this Part apply. If the NRC determines that NRC has jurisdiction,
				  but has not established standards, the Agency may propose to NRC that these or
				  other standards be applied to such boilers and pressure vessels in nuclear
				  power plants in Illinois.
a) All new,
				existing and reinstalled non-ISI boilers, including related appurtenances,
				shall be designed, constructed, installed, examined, tested, repaired and
				altered in accordance with the ASME Code or National Board Inspection Code, as
				applicable, and inspected in accordance with this Part. Where a non-ISI boiler
				is moved and reinstalled, the fittings and appliances of that boiler shall
				comply with this Part.
b) All
				non-ISI pressure vessels installed and placed in operation after December 31,
				1976 and all reinstalled non-ISI pressure vessels, including related
				appurtenances, shall be designed, constructed, installed, tested, examined,
				repaired and altered in accordance with the ASME Code or National Board
				Inspection Code, as applicable, and inspected in accordance with this Part.
				Where a non-ISI pressure vessel is moved and reinstalled, the fittings and
				appliances of that pressure vessel shall comply with this Part.
c) Non-ISI pressure vessels and related
				appurtenances installed and placed in operation at nuclear facilities on or
				before December 31, 1976 shall be inspected in accordance with this Part and
				designed, constructed, installed, tested, repaired and altered, in accordance
				with the following requirements.
1) The MAWP
				for standard pressure vessels shall be determined in accordance with the
				applicable provisions of the ASME Code under which they were constructed and
				stamped.
2) MAWP for Non-standard
				Pressure Vessels
A) The MAWP of a
				non-standard pressure vessel subject to internal pressure shall be determined
				by the strength of the weakest course computed from the thickness of the plate,
				the tensile strength of the plate, the efficiency of the longitudinal joint,
				the inside diameter of the course and the factor of safety set by this Part, as
				follows:
TS x t x E
=
MAWP, in psig
R x FS
where:
TS
=
ultimate tensile strength of shell plate, in psi.
							 When the tensile strength of steel plate is not known, it shall be taken as
							 55,000 psi for temperature not exceeding 650° F.
t
=
minimum thickness of shell plate of weakest course,
							 in inches.
E
=
efficiency of longitudinal joint, depending upon
							 construction. Use the following values (in percents):
For Fusion-Welded and Brazed Joints:
Single lap welded........................................
				  40
Double lap welded......................................
				  60
Single butt welded......................................
				  60
Double butt welded.....................................
				  75
Forge welded...............................................
				  70
Brazed steel.................................................
				  80
For riveted joints - calculate riveted joint efficiency in
				  accordance with rules given in Section I, Part PR, of the 1971 ASME
				  Code.
R
=
inside radius for weakest shell course, in inches,
							 provided the thickness does not exceed 10 percent of the radius. If the
							 thickness is over 10 percent of the radius, the outer radius shall be
							 used.
FS
=
factor of safety permitted shall be a minimum of
							 5.0.
B)
				The MAWP for cylindrical non-standard pressure vessels subject to external or
				collapsing pressure shall be determined by the rules in Par. UG-27 and UG-28 of
				the ASME Code Section VIII.
C) The
				minimum factor of safety may be increased when deemed necessary by the
				Authorized Inspector to assure the operation of the vessel within safe limits.
				The condition of the vessel and the particular service to which it is subject
				will be determining factors.
D) The
				MAWP permitted for formed heads under pressure shall be determined by using the
				appropriate formulas from UG-32 or UG-33 of the ASME Code Section VIII and the
				tensile strength and efficiencies given in this Section.