6.56. In conclusion, in the safety assessment for a waste disposal facility, inadvertent (unintentional) human intrusion should be considered but quantification of the potential risks associated with deliberate intrusion need not be carried out. Consequently, inadvertent human intrusion should be assumed to occur at some time following the loss of knowledge about the site and its hazardous contents. This implies that an individual or group of individuals intruding into the disposal facility (the intruders) will, at least for a short period, be directly exposed to radiation while being unaware of the associated potential hazard. Intrusion may also lead to increased release of radioactive material and increased long term exposure of individuals or groups around the disposal facility.