Band 7+: The diagram below shows the production of steam using a gas cooled nuclear reactor. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The report provides a clear and accurate overview of the main stages in the steam production process, correctly identifying the two main components and the cyclical nature of the gas coolant. It includes relevant details about the reactor, heat exchanger, and the roles of the gas and water. However, there are a few minor omissions and inaccuracies: the report does not mention the control rods, charge tubes, or concrete shielding, which are part of the diagram. Additionally, the description of the water circulation is slightly incomplete, as it does not mention the water circulator or the return of condensed water. The language is generally clear, but there are some grammatical and spelling errors (e.g., 'componant', 'graphte', 'tranfers', 'It is subsequently passes') that slightly affect readability. To improve, ensure all key components are mentioned and proofread for grammatical accuracy.

The report is logically organized and the process is described in a clear sequence. However, there are some minor lapses in cohesion, such as the abrupt transition from the reactor to the heat exchanger, and the final sentence could be more smoothly integrated. The use of cohesive devices is generally effective, but a few more linking words would enhance the flow.

The vocabulary used is appropriate for the task, with some good technical terms like 'uranium fuel', 'graphite moderators', and 'high-pressure steam'. However, there are some spelling errors (e.g., 'componant', 'graphte', 'tranfers') and a few awkward phrases (e.g., 'passes through reactor core' could be 'passes through the reactor core'). A wider range of precise vocabulary and more sophisticated control would improve the score.

The report demonstrates a good range of grammatical structures, including passive voice and complex sentences. However, there are several grammatical errors, such as 'consists two main componant' (should be 'consists of two main components'), 'It is subsequently passes' (should be 'It subsequently passes'), and missing articles (e.g., 'the reactor core'). These errors, while not impeding understanding, affect the overall accuracy and would need to be addressed for a higher band score.