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The following report is an excerpt from a … The following report is an excerpt from a fax from Engine Systems, Inc.:</br>ESI (Engine Systems, Inc.) supplied a refurbished pressure regulator assembly, P/N 1776 506, S/N 20776487, to Brunswick Nuclear Plant in August 2017. ESI later determined that two components of the assembly, an upper and lower diaphragm plate, were omitted during reassembly of the refurbished regulator. Reference item 8 on Figure 1 for location of the diaphragm plates within the pilot valve portion of the regulator </br>assembly. These metal diaphragm plates distribute load and retain the associated rubber diaphragm. Omission of the metal plate may not initially affect operation of the pilot valve and therefore may not be detected during functional testing; however over repeated cycles there is a strong possibility that </br>the rubber diaphragm would tear or rupture without the benefit of load distribution and support </br>provided by the metal diaphragm plate. </br>The regulator assembly is used in the safety-related air start system of the emergency diesel generators (EDGs) at Brunswick Nuclear Plant. Failure of the regulator to function properly due to the omission of a component within the pilot valve portion of the assembly could adversely affect the starting capability of the EDG. Since the EDG is a safety system used to ensure the safe shutdown of the nuclear reactor, this issue is considered to be a reportable defect as defined by 10CFR21.a reportable defect as defined by 10CFR21. +
04:00:00, 1 February 2018 +
53,302 +
15:50:00, 30 March 2018 +
04:00:00, 1 February 2018 +
The following report is an excerpt from a … The following report is an excerpt from a fax from Engine Systems, Inc.:</br>ESI (Engine Systems, Inc.) supplied a refurbished pressure regulator assembly, P/N 1776 506, S/N 20776487, to Brunswick Nuclear Plant in August 2017. ESI later determined that two components of the assembly, an upper and lower diaphragm plate, were omitted during reassembly of the refurbished regulator. Reference item 8 on Figure 1 for location of the diaphragm plates within the pilot valve portion of the regulator </br>assembly. These metal diaphragm plates distribute load and retain the associated rubber diaphragm. Omission of the metal plate may not initially affect operation of the pilot valve and therefore may not be detected during functional testing; however over repeated cycles there is a strong possibility that </br>the rubber diaphragm would tear or rupture without the benefit of load distribution and support </br>provided by the metal diaphragm plate. </br>The regulator assembly is used in the safety-related air start system of the emergency diesel generators (EDGs) at Brunswick Nuclear Plant. Failure of the regulator to function properly due to the omission of a component within the pilot valve portion of the assembly could adversely affect the starting capability of the EDG. Since the EDG is a safety system used to ensure the safe shutdown of the nuclear reactor, this issue is considered to be a reportable defect as defined by 10CFR21.a reportable defect as defined by 10CFR21. +
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00:00:00, 30 March 2018 +
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11:30:40, 2 April 2018 +
15:50:00, 30 March 2018 +
57.535 d (1,380.83 hours, 8.219 weeks, 1.891 months) +
04:00:00, 1 February 2018 +
Part 21 - Refurbished Pressure Regulator May Result in Emergency Diesel Generator Failure to Start +
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