Eesti tervishoiu esmatasandini jõudis kliiniliste otsuste tugisüsteem

Eesti Arst 2020; 99(11):665–666 &nbsp

Hatton-Rockall geophysical survey RRS discovery cruise D273 BGS project 03/01 operations report

This report describes the operation of Discovery Cruise D273, BGS Project 03/01, a regional geophysical survey of the UK Continental Shelf in the Hatton–Rockall area, carried out from 13th to 28th August 2003. Due to ongoing difficulties with the Discovery winch replacement programme, the duration of the cruise was cut, initially from 21 to 17 days and then by a further two days shortly before the start. Since the programme was planned for 21 days operations it was always going to be impossible to complete it. The vessel proved to be excellent for the work and the survey was very successful, with the above caveat. A total of 1677km of good quality data were collected. The survey was a part of the BGS Offshore Mapping and Modelling Project (E1281S73) and was allocated Discovery Station Number 15232

Cracking and Corrosion of Composite Tubes in Black Liquor Recovery Boiler Primary Air Ports

Black liquor recovery boilers are an essential part of kraft mills. Their design and operating procedures have changed over time with the goal of providing improved boiler performance. These performance improvements are frequently associated with an increase in heat flux and/or operating temperature with a subsequent increase in the demand on structural materials associated with operation at higher temperatures and/or in more corrosive environments. Improvements in structural materials have therefore been required. In most cases the alternate materials have provided acceptable solutions. However, in some cases the alternate materials have solved the original problem but introduced new issues. This report addresses the performance of materials in the tubes forming primary air port openings and, particularly, the problems associated with use of stainless steel clad carbon steel tubes and the solutions that have been identified