Human IPLs

About Human IPLs

Human IPLs are IPLs that require operators or other staff to take action to prevent an undesired consequence, in response to alarms or following a routine check of the system.

In LOPA, you can create a Human IPL record for each type of human IPL. This record stores the recommended probability of failure on demand (PFD) of the human IPL. The PFD value indicates the likelihood that the Human IPL will fail to perform its safety function when required. The Human IPL records populate the IPL Sub Type field in the IPL Checklist section of the Safeguard, which is of type Human IPL.

Default Human IPL Records

By default, the following Human IPL records are available in GE Digital APM:

Human IPL IDLower RangeUpper RangeDefault Value
Human Action with BPCS/alarm-4 min response time0.0110.1
Human Action with >10 min response time0.110.1
Human Action with >40 min response time0.010.10.1

Access a Human IPL

Procedure

  1. Access the LOPA Admin page.
  2. In the left pane, select Human IPL.

    A list of available Human IPLs appears.

  3. In the Human IPL ID column, select the link for the Human IPL that you want to access.

    In the Record Manager, the page for the selected record appears, displaying the datasheet for the record.

    Note: To modify the Human IPL, as needed, modify values in the available fields, and then select to save your changes. The values in the existing Safeguards that have used the modified Human IPL will not be affected by the changes. If you want to apply the changes to an existing Safeguard, in the IPL Checklist section of the Safeguard, in the IPL Sub Type box, you must reselect the Human IPL that you modified.

Create a Human IPL

Before You Begin

  • For the Human IPL that you want to create, you must create a system code in the MI_HUMAN_IPL System Code Table. The system code populates the Human IPL ID box. When you create the Human IPL, in the Human IPL ID box, you must select the value that you entered in the System Code Table.

Procedure

  1. Access the LOPA Admin page.
  2. In the left pane, select Human IPL.

    A list of available Human IPLs appears.

  3. In the upper-left corner of the workspace, select .

    A blank datasheet for Human IPL appears.

  4. As needed, enter values in the available fields.
  5. In the upper-right corner of the workspace, select .

    The Human IPL record is created.

Results

Delete a Human IPL

Before You Begin

  • Before you can delete a Human IPL, you must delete the corresponding System Code that you created in the MI_HUMAN_IPL System Code Table.

Procedure

  1. Access the LOPA Admin page.
  2. In the left pane, select Human IPL.

    A list of available Human IPLs appears.

  3. In the row for each Human IPL that you want to delete, select the check box.

    In the upper-right corner of the workspace, the button is enabled.

  4. Select .

    The Delete Human IPL dialog box appears, asking you to confirm that you want to delete each selected Human IPL.

  5. Select OK.

    Each selected Human IPL is deleted.

Results

  • In the IPL Checklist section of the Safeguard of type Human IPL, the Human IPL that you deleted does not appear in the list of values in the IPL Sub Type box.

    Note: The values in the existing Safeguards that have used the deleted Human IPL will not be affected when you delete the Human IPL record.

Related Information