Separate modified-handling Safeguards Information from ordinary sensitive records

Use this document to connect an official requirement or behavior to observable evidence: Separate modified-handling Safeguards Information from ordinary sensitive records. Only the official source and traced locations below supply facts. Confirm applicability before acting.

Source fact:

The official 10 CFR 73.23 – Safeguards Information-Modified Handling from U.S. Nuclear Regulatory Commission via eCFR supports the following bounded statements:

• Under 10 CFR 73, protected Safeguards Information – Modified Handling includes nonpublic, site-specific design features of plant security communications systems. The research record locates this support at 10 CFR 73.23(a)(1)(v), read with 10 CFR 73.23(a)(1)|73.23(a) (eCFR anchor p-73.23(a)(1)(v)).
• Under 10 CFR 73, protected Safeguards Information – Modified Handling includes a facility’s or site’s composite physical security plan. The research record locates this support at 10 CFR 73.23(a)(1)(i), read with 10 CFR 73.23(a)(1)|73.23(a) (eCFR anchor p-73.23(a)(1)(i)).

Do not import neighboring assumptions into the source record. The supported task is a scoped comparison involving access control, video, intrusion detection, communications, supporting facilities, operators, and documented response paths and the conditions the source actually describes.

What the source does not establish

NRC regulation for a defined information category; classification, authorization, handling, and disclosure decisions require qualified review and protected operational details must not be published. A correct source interpretation can still be inapplicable to a particular design. Confirm identity, Windows DNS where used, time, networks, power, life-safety systems, vendors, and monitoring personnel, ownership, and change authority instead of treating documented behavior as a deployment guarantee.

Applicability questions

• For source statement 1 at 10 CFR 73.23(a)(1)(v), read with 10 CFR 73.23(a)(1)|73.23(a) (eCFR anchor p-73.23(a)(1)(v)), which observable configuration, record, or test can confirm applicability here?
• For source statement 2 at 10 CFR 73.23(a)(1)(i), read with 10 CFR 73.23(a)(1)|73.23(a) (eCFR anchor p-73.23(a)(1)(i)), which observable configuration, record, or test can confirm applicability here?
• Which deployed instance of access control, video, intrusion detection, communications, supporting facilities, operators, and documented response paths will be compared with the source, and why that instance?
• How will the review distinguish a source mismatch from a failure in identity, Windows DNS where used, time, networks, power, life-safety systems, vendors, and monitoring personnel?
• Who approves the conclusion, exception, test window, and rollback threshold?

DSE recommendation:

DSE recommends using the cited source as the evidence anchor for this decision. Use a two-person review for the source interpretation and the resulting operational decision. Record the source location, examined part of access control, video, intrusion detection, communications, supporting facilities, operators, and documented response paths, observed and expected states, owner, and reason for deviation.

Translate the conclusion into change control only after documenting dependencies, impact, test method, expected signals, failure signals, and restoration steps. Include identity, Windows DNS where used, time, networks, power, life-safety systems, vendors, and monitoring personnel, while excluding secrets and sensitive personal or topology data from ordinary tickets.

Verification and evidence

Build a reproducible chain from 10 CFR 73.23(a)(1)(v), read with 10 CFR 73.23(a)(1)|73.23(a) (eCFR anchor p-73.23(a)(1)(v)); 10 CFR 73.23(a)(1)(i), read with 10 CFR 73.23(a)(1)|73.23(a) (eCFR anchor p-73.23(a)(1)(i)) to the observed environment. Useful domain evidence includes asset and firmware inventories, configuration exports, event tests, inspections, alarm response records, and maintenance findings; label every item with scope, timestamp, collector, and stable identifier.

Close the review only when the evidence, exception handling, resulting action, and after-state are linked. Schedule a new review after material technical, organizational, incident, or source changes; today’s observation is not a continuing guarantee.

Official references

• 10 CFR 73.23 – Safeguards Information-Modified Handling — U.S. Nuclear Regulatory Commission via eCFR