1. R6 Revision 3. Assessment of the integrity of structures containing defects. British Energy Generation Ltd, Amendment 10, May 1999.
2. Assessment of the integrity of structures containing defects. CEGB Report R/H/R6, 1976; Revision 1, 1977; Revision 2, 1980; Revision 3, 1986.
3. R5. Assessment procedure for the high temperature response of structures. British Energy Generation Ltd, Issue 2, 1998.
4. BS PD 6493. Guidance on some methods for the derivation of acceptance levels for defects in fusion welded joints. British Standards Institution, London, 1980.
5. BS PD 6493. Guidance on methods for assessing the acceptability of flaws in fusion welded structures. British Standards Institution, London, 1991.