The steam dump system in Gentilly Nuclear Power Plant consists of four parallel steam pipes, each of which comprises a steam control valve. Two pipes of this system experienced high-cycle fatigue damage. In-situ vibration and dynamic strain measurements were therefore conducted to identify the cause of the damage and formulate suitable counter-measures. The test results pointed to the high-frequency noise of the valve as the primary source causing the fatigue failure. By means of small-scale model tests, using a compressed air network, a new valve stem was developed, which produces a substantially lower noise level than that generated by the original valve stem. Implementing this new stem in the plant, without any other modifications in the valve body or the piping system, significantly reduced the dynamic stresses of the piping, but increased the vibration level of the valve itself. An alternative valve stem, which is a simpler version of the new design, was therefore tested and found to reduce the pipe stresses sufficiently while not increasing the level of valve vibration.
Patients are best positioned to provide information about their experiences of healthcare services; however, their perspectives are often underutilized. During informal discussions with massage therapists (MTs), and through the authors’ own professional experiences, it was noted that there are times when patients decide independently, and without notice, to end the care they are receiving. To date, no research has been published exploring the experiences of patients who choose to discontinue massage therapy care and there is a gap in the quality assurance process of MTs. Lack of understanding of patients’ experiences is a missed opportunity to strengthen the therapeutic relationship, ensure patient safety, improve treatment quality, and develop professionally. To affect change within multiple levels of the profession so that patients’ experiences are valued and solicited in a manner that allows patients to provide critical feedback, we recommend two initial actions. First, we challenge massage therapy stakeholders to consider alternate research methodologies and methods to explore this phenomenon. Second, we recommend that MTs cultivate an appreciation for constructive criticism and actively listen to their patients with confidence.
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