The need for the information on radiation dose rate for ships from Japan has been on the increase at the ports outside Japan since the aftermath of damage on the Fukushima nuclear power plant caused by the earthquake on 11 March 2011 and subsequent Tsunami.

In the face of this need, Japanese Government (MLIT: Ministry of Land, Infrastructure, Transport and Tourism) has developed the guideline on radiation measurement for ships in order to provide foreign port authority with proper access to accurate data. Attestation for radiation dose rate will be issued if the measurement is conducted based on the guideline. ClassNK is requested by MLIT to issue an attestation in case where the measurement is conducted in Port of Keihin Yokohama Area.

In this context, ClassNK issues the attestation for ships of which radiation dose rate is measured in line with the guideline in Port of Keihin Yokohama Area. ClassNK is also ready to issue an appraisal report for ships that measurement is carried out in Japanese ports other than Yokohama area.

The attestation issuance procedures are shown below.
A) The radiation dose rate measurement operator is to be arranged by the applicant.
B) The applicant requests ClassNK (the nearest service site from the location of the measurements) for a document of attestation, submitting to ClassNK reports containing the results of measurement to be conducted following the guideline. ClassNK issues the attestation having confirmed that the data provided in the reports are based on the measurements method provided in the guideline.
C) ClassNK does not charge the attestation issuance fees.

For any questions about the above, please contact:

NIPPON KAIJI KYOKAI (ClassNK)
Survey Department, Administration Center, Head Office
Address: 4-7 Kioi-cho, Chiyoda-ku, Tokyo 102-8567, Japan
Tel.: +81-3-5226-2027 / 2028
Fax: +81-3-5226-2029
E-mail: svd@classnk.or.jp

Attachment:
1. Guideline for measurement of dose rate for ships in port
2. Application and reporting form