IAPWS Certified Research Needs (ICRN's) represent the considered opinion of experts in the field that research on a particular subject is needed. They are often developed as a response to the inavailability of adequate data of a particular kind. They consist of a statement of the problem, a statement of the industrial need, a contact person, and an expiration date. No funding is available from IAPWS, but the ICRN's may be copied and attached to proposals to funding agencies.

Below, we list the currently active ICRN's. Active links indicate those that are downloadable; others must be requested in paper form from the IAPWS Executive Secretary (see below). Following the list of active ICRN's, those that have recently expired are listed if closing statements are available.

Note that all ICRN's are numbered, but some numbers in the sequence are not listed on this page because the corresponding ICRN has expired or has not yet been issued. A complete list of IAPWS ICRN's, including those that have expired, is here.

List of Active ICRN's

• [13] Surface Tension of Aqueous Solutions. Issued September 1998. Expires July 2005. IAPWS Contacts: F. Sigon and F. Gabrielli
• [14] Thermophysical Properties of Humid Air and Combustion Gas Mixtures. Issued July 2002. Expires September 2008. IAPWS Contacts: R. Span and M. Hiegemann
• [15] Thermodynamic Properties of Metastable Steam. Issued July 2002. Expires September 2005. IAPWS Contact: B. Rukes
• [16] Thermophysical Properties of Seawater. Issued August 2007. Expires August 2010. IAPWS Contact: R. Feistel
• [18] Decomposition of Ion Exchange Resins. Issued September 2006. Expires September 2009. IAPWS Contact: K. Daucik
• [19] Improved Coolant Sampling and Analysis of Low Concentration Metals (Fe, Cu, Co, etc.). Issued September 2006. Expires September 2009. IAPWS Contact: D. Lister
• [20] Sensors for Use at Elevated Temperature in the Plant Cycle of the Power Industry. Issued September 2006. Expires September 2009. IAPWS Contacts: E. Maughan and S. Lvov

List of Available Closing Statements

• [1] Evaluation of Binary Nucleation Models. Issued September 1993. Expired August 2004. Closing Statement, November 2005. IAPWS Contact: F. Marsik
• [2] Solubility of Sodium Sulphate in Superheated Steam. Issued September 1993. Expired September 2001. Closing Statement, October 2001. IAPWS Contact: K. Daucik
• [5] Origin, Behavior, and Fate of Organics in the Power Cycle and their Impact on Chemical Specifications. Issued September 1993. Expired August 2004. Closing Statement, July 2006. IAPWS Contact: E. Maughan
• [6] Thermophysical Properties of Ammonia-Water Mixtures. Issued June 1994. Expired June 2000. Closing Statement, July 2002. IAPWS Contact: W. Parry

Updated June 4, 2008