Source: https://tendernation.io/opportunities/01a13ce8-d36d-718c-aa66-26e557664f1b/active-electrochemical-measurements

awarded GB negotiated without publication procedure Suitable for SMEs

# Active Electrochemical Measurements

[National Nuclear Laboratory Limited](https://tendernation.io/buyers/national-nuclear-laboratory-limited)

Estimated value

£27,400

Published

28 Feb 2024

Deadline

Closed

19 Jan 2024

## Who can bid

- Buyer says suitable for SMEs

    The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid.
- Small contract value

    Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services.

[More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses)

## About this tender

Non-active electrochemistry data for AGR cladding has been generated and modelling evaluation was carried

out by NPL, using the newly measured data to guide inputs, to predict susceptibility of the fuel cladding to SCC

in caustic conditions. Following these initial experiments, additional non-active testing has been carried out and

subsequent further modelling tasks and development have been recommended.

NPL will carry out the following Tasks:

• Investigation of the sensitivity of the modelling results (tip acidification and tip chloride accumulation) to the

transfer coefficient related to the cathodic reaction.

• Investigation of the sensitivity of the modelling results (tip acidification and tip chloride accumulation) to the

passive current density.

• Modify previous COMSOL simulation model of crack electrochemistry for advanced gas-cooled reactor

stainless steel cladding in pond storage to include the presence of boric acid.

• Modify the model to account for the dependency of the crack-tip current density on the local electrode

potential.

• Assess numerical convergence issues related to the very sharp change in electrode kinetics between the crack

walls and crack-tip and endeavour to resolve.

• NPL report containing the modifications to the previous model and example of results.

• Modify COMSOL model

## CPV classification

Nuclear fuels

Source

Contracts Finder (UK)

[View official notice](https://www.contractsfinder.service.gov.uk/notice/89c71dd5-926c-4379-89b6-cb0791c01c14)

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